• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    FILTER APPLIANCE WITH EJECTION ARRAY. It is a filter cartridge that includes bolts to eject the filter cartridge from a filter housing as the filter cartridge and filter housing are removed from a filter base. The ferrules are configured to engage corresponding ferrules of the filter base to limit the axial movement of the filter cartridge as the filter cartridge and the filter housing are threadedly removed from the filter base.
    公开号:BR112014018543B1
    申请号:R112014018543-3
    申请日:2013-01-23
    公开日:2021-02-02
    发明作者:John H. Beard；Stephen Schweitzer
    申请人:Baldwin Filters, Inc；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    [001] The present invention relates to filtration devices and, more particularly, to replaceable filter cartridges and, even more particularly, to mechanisms and methods of removing a filter cartridge from a filter housing. BACKGROUND OF THE INVENTION
    [002] Filtration systems are used to filter fluids. For example, filtration systems are used to filter impurities from fuel, hydraulic fluids, water and other fluid fluids. A particular filter uses a filter base to which a filter element is attached. The filter base provides an inlet through which the dirty fluid enters the filter system and an outlet through which the clean fluid exits the filter system. The filter element performs the function of removing unwanted impurities from the fluid.
    [003] For some systems, such as engine fuel systems, hydraulic power systems and lubrication systems, the filter element includes filter means that are replaced at predetermined maintenance intervals or when otherwise spent. Therefore, it is desirable to provide easy methods for replacing the filter media.
    [004] In some embodiments, the filter element includes a reusable housing in which a disposable filter cartridge, which includes the filter means, is positioned during operation. The housing can also be called a bowl. In many cases, the filter cartridge is sealed in the filter housing which can make it difficult to remove the replaceable filter cartridge at service intervals. A problem associated with removing the replaceable filter cartridge is that this can create a significant problem for the user if it is difficult to remove the filter cartridge from the outer housing.
    [005] The present invention relates to the current state of the art, since it relates to filtration systems that use a reusable housing and a replaceable filter cartridge that make it easy to remove the filter cartridge from the filter housing. BRIEF SUMMARY OF THE INVENTION
    [006] The embodiments of the present invention provide improved removal of a filter cartridge from a filter housing while removing a filter element formed from the filter cartridge and the filter housing from a filter base.
    [007] In a particular embodiment, a filter is provided that includes a filter base, a filter element and an auto-eject interface. The filter element is selectively mountable on the filter base. The filter element includes an external housing that includes a side wall that defines an open end. The filter element also includes a filter cartridge axially received within the filter housing slidable between a position released relative to the housing in which the filter cartridge can be removed from the housing with the use of a first amount of axial force (in a gravity mode when the filter element is inverted) and an inserted position in relation to the housing where a second amount of force, greater than the first amount of force, is required to axially transit the filter element with respect to the filter housing for the released position. The filter cartridge includes filter means for filtering fluid that passes through the filter element. The auto-eject interface is provided between the filter element and the filter base and is configured to transition the filter cartridge to the released position from the inserted position as the filter element is transitioned from an assembled state to a disassembled state in relation to the filter base.
    [008] In one embodiment, the filter cartridge engages the housing in the inserted state with sufficient force that prevents the filter cartridge from being moved from the inserted position to the position released under the force of gravity when the filter element is removed from the base filter and inverted.
    [009] In one embodiment, the auto-eject interface includes a filter base contiguity shelf and a filter cartridge contiguity hook. The filter cartridge contiguity hook axially engages the filter base contiguity shelf axially which limits the movement of the filter cartridge in relation to the filter base as the filter element is moved from the assembled to the disassembled state. so that the filter cartridge transitions from the inserted state to the released state as the filter element is transitioned from the assembled state to the disassembled state along an assembly geometry axis.
    [010] In one embodiment, the filter base contiguity shelf includes a first contiguity surface that is axially facing away from the filter means when the filter element is attached to the filter base and the filter cartridge contiguity hook includes a second contiguous surface facing axially towards the filter means. The first contiguity surface engages the second contiguity surface when the filter cartridge contiguity hook axially engages the filter base contiguity shelf.
    [011] In one embodiment, the filter base contiguity shelf extends angularly around the geometric axis of the filter assembly by an amount greater than the contiguity of the filter cartridge, the filter element transits from the assembled state to the state disassembled along the geometric axis of assembly.
    [012] In one embodiment, the filter cartridge contiguity hook includes a leg portion that extends axially and a head portion that extends radially outwardly from the leg portion. The filter base contiguity shelf includes a flange portion that extends radially inward. The radially inwardly extending flange portion and the radially outwardly extending hook portion engage axially when the filter cartridge contiguity hook axially engages the filter base contiguity shelf.
    [013] In one embodiment, the leg portion is configured to flex radially to adjust the radial position of the hook portion to allow the hook portion to pass axially beyond the flange portion that extends radially inward as per the filter element moves axially along the assembly axis to the assembled state from the disassembled state while the filter element is mounted on the filter base.
    [014] In one embodiment, the filter housing includes at least one housing thread that cooperates with at least one filter base thread from the filter base to selectively mount the filter element on the filter base by rotating the housing in around the geometric axis of assembly in a first angular direction. The cooperation between the filter base thread and the housing thread causes the filter element to be pulled axially towards the filter base along the mounting axis as the housing is rotated about the mounting axis in the first angular direction.
    [015] In one embodiment, the filter cartridge translates a first distance parallel to the mounting axis relative to the housing between the released position and the inserted position and where the filter housing translates at least the first distance parallel to the geometric axis of mounting in relation to the filter base between the mounted state and the disassembled state.
    [016] In one embodiment, a removal notch is angularly adjacent to one end of the flange portion that extends radially inward. The removal notch is configured to allow the head portion to axially pass through it when the head portion is angularly aligned therewith to disengage the filter cartridge from the filter base. The removal notch allows less or no radial deformation of the leg portion as the head portion passes axially through it in comparison to the axial passage beyond the inwardly extending flange portion.
    [017] In one embodiment, the filter cartridge is slidable in relation to the housing on a sliding interface. The sliding interface includes a radially directed annular seal that slides on an annular surface. The annular seal engages the annular surface in the inserted position and the annular seal substantially disengaged from the annular surface in the released position.
    [018] In one embodiment, the filter base includes an annular skirt that extends angularly around and axially parallel to the geometric axis of assembly. The annular skirt receives the open end of the side wall of the housing axially therein. The housing includes at least one housing thread that cooperates with at least one filter base thread formed on the annular skirt of the filter base to selectively mount the filter element on the filter base by rotating the housing around the geometric axis of assembly in a first angular direction. The cooperation between the filter base thread and the housing thread causes the filter element to be pulled axially towards the filter base along the mounting axis as the housing is rotated about the mounting axis in the first angular direction. The filter cartridge contiguity hook is provided by the filter cartridge.
    [019] In one embodiment, the filter cartridge includes an end cap positioned adjacent to the open end of the housing in the inserted position. The end cap that includes the filter cartridge contiguity hook.
    [020] In another mode, a filter cartridge is provided. The filter cartridge is configured for insertion into a housing of a filter element that is selectively mountable on a filter base. The housing has a sealing surface directed radially inward and a housing thread directed radially outward. The filter base has an annular skirt that defines at least one base thread that can be engaged with the housing thread. The filter base also defines a filter base contiguity shelf that extends radially. The filter cartridge includes filter means, a first end cap, an outer rim and a filter cartridge contiguity hook. The first end cap is attached to the filter means. The outer rim engages the sealing surface directed radially inward when installed. The filter cartridge contiguity hook includes an axially extending leg portion and a radially extending head portion from the leg portion. The radially extending head portion is configured to axially engage the filter base contiguity shelf that extends radially to prevent movement of the filter cartridge relative to the filter base when the filter element is removed axially from the filter base. filter.
    [021] In one embodiment, the leg portion is configured to flex radially to adjust the radial position of the head portion to allow the head portion to pass axially beyond the contiguity shelf that extends radially as the filter element moves axially along a geometric mounting axis as the filter element is mounted on the filter base.
    [022] In one embodiment, the head portion extends radially outward.
    [023] In another embodiment, the filter cartridge contiguity hook is part of the first end cap.
    [024] In another mode, a filter cartridge is provided. The filter cartridge includes a tubular ring of filter means; a first end cap; a filter cartridge contiguity hook and a radially outwardly sealing seal. The first end cap is attached to a first end of the filter means. The filter cartridge contiguity hook includes an axially extending leg portion and a radially extending head portion from the leg portion. The radially extending head portion defines a contiguous surface facing axially towards the filter means. The first seal directed radially outwardly is adjacent to a radially outer rim of the first end cap to seal the end cap in a filter housing.
    [025] In one embodiment, the filter cartridge contiguity hook is part of the first end cap. The leg portion extends axially outwardly from a body portion of the first end cap and in the direction opposite to the filter means. The head portion extends radially over a portion of the body portion and forms a lower cut region between it.
    [026] Other aspects, objectives and advantages of the invention will become more evident from the following detailed description when adopted in conjunction with the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS
    [027] The accompanying drawings incorporated in and forming a part of the specification illustrate various aspects of the present invention and, together with the description, serve to explain the principles of the invention. In the drawings:
    [028] Figure 1 is a cross-sectional illustration of a filter according to an embodiment of the present invention;
    [029] Figure 2 is a partially exploded cross-sectional illustration of the filter in Figure 1;
    [030] Figure 3 is a cross-sectional perspective illustration of the filter in Figure 1;
    [031] Figure 4 is an additional partial exploded perspective illustration of the filter of Figure 1 taken in cross section 4-4 of Figure 1;
    [032] Figures 5 to 7 are simplified illustrations of the interaction between the components of the auto-ejection mechanism of the filter in Figure 1;
    [033] Figures 8 to 10 are illustrations in cross section of the filter in the same orientation as in Figures 5 to 7;
    [034] Figures 11 to 13 illustrate in simplified form the torsion lock coupling of the filter of Figure 1;
    [035] Figures 14 to 16 are similar to Figures 5 to 7, but during the removal process;
    [036] Figures 17 to 19 are similar to Figures 11 to 13 and illustrate the twist lock arrangement in simplified form during the removal process;
    [037] Figures 20 to 22 are cross-sectional illustrations similar to Figures 8 to 10 during the removal process;
    [038] Figure 23 further illustrates the removal of the filter cartridge from the filter housing as the filter element is removed from the filter base in accordance with an embodiment of the present invention.
    [039] Although the invention is described in conjunction with certain preferential modalities, it is not intended to limit it to those modalities. Adversely, the intention is to cover all alternatives, modifications and equivalents as included in the spirit and scope of the invention as defined in the appended claims. DETAILED DESCRIPTION OF THE INVENTION
    [040] Figure 1 is a simplified cross-sectional illustration of a filter 100 according to a first embodiment of the present invention. Filter 100 is used to remove impurities from a fluid. More particularly, the filter 100 can be used to remove particulate, as well as liquid (i.e., water), impurities from the fluid flowing through it. However, the modalities of the filter 100 do not need to filter both the particulates and the fluid liquid while remaining within the teachings of the present invention.
    [041] The filter 100 generally includes a filter base 102 and a filter element 104 which is removably attached to the filter base 102.
    [042] The filter base 102 generally includes a fluid inlet 106, a clean fluid outlet 108 and a return port 110. The dirty fluid inlet 106 is functionally and fluidly coupled to a dirty fluid source such such as a pump, engine, hydraulic system, fuel supply, etc. The fluid that is cleaned by the filter 100 exits through the clean fluid outlet 108 and is used by a downstream system. Return port 110 is functionally coupled to an outlet or storage where impurities that have been removed from the fluid can be drained from filter element 104. More particularly, in one embodiment, return port 110 is functionally coupled to the system's fluid storage tank. Impurities such as water that are removed from the fluid can be drained back into the storage tank via return port 110. Not all embodiments and implementations of the invention require a return port 110.
    [043] The filter element 104 is selectively mountable on the filter base 102 and is generally formed of a filter housing 114 (alternatively called "bowl 114") and a filter cartridge 116.
    [044] In further reference to Figure 3, the filter element 104 is preferably threadably attached to the filter base 102 with at least one cooperative thread arrangement between the filter base 102 and the filter housing 114 in such a way that the rotation of the filter element 104 about the geometric axis 162 assembles the element 104 on the filter base 102 and the rotation in the opposite direction removes the filter element 104 from the filter base 102. In the illustrated embodiment, the filter housing 114 it has a pair of threads 120 that cooperate with a corresponding set of threads of the filter base 102 (see, for example, Figure 3). The filter base 102 includes an annular skirt portion 124 which defines the threads 122 which cooperate with the corresponding threads 120 of the filter element which rotatably hold the filter element in the filter base 102.
    [045] Referring to Figure 1, as the filter element 104 is rotated with respect to the filter base 102 around the geometric axis 162, the filter element 104 is axially pulled at an open end 126 of the annular skirt 124 along geometry axis 162. As filter element 104 is axially pulled into annular skirt portion 124, filter element 104 will functionally engage filter base 102 to define multiple flow passages through filter 100. More particularly , the filter element 104 will engage the filter base 102 to define a dirty fluid stream, a clean fluid stream that is separated from the dirty fluid stream by filter means of filter element 116 and an evacuation stream to evacuate the particulates through the return port 110.
    [046] Additionally, filter 100 includes a twist lock arrangement 130 that acts between filter element 104 and filter base 102. Details of twist lock arrangement 130 are described in patent No. US8,057,669, filed on June 16, 2008, entitled "Filter Element and Filter Assembly Including Locking Mechanism", by Beard et al., whose teachings and revelations are incorporated by reference in this document. The twist lock arrangement 130 is used to prevent loosening of the filter element 104 from the filter base 102 by inhibiting rotation in an opposite direction about the geometry axis 162 as required to mount the filter element 104 on the filter base 102.
    [047] In further reference to Figure 2, filter element 104, as noted above, is generally provided by filter housing 114 and filter cartridge 116. Filter housing 114 generally includes an annular side wall 134 and a closed bottom part 136. The closed bottom part 136 may, however, include drain valves or other openings. In opposition to the closed bottom part 136 is an open end 138 which is generally provided by a distal end of the annular side wall 134. The open end is dimensioned for sliding receipt and removal of filter cartridge 116 into and out of the housing filter 114. As noted above, housing 114 provides threads 120 which are used to secure filter element 104 to filter base 102. These threads 120 extend radially outwardly from the outer surface of the annular sidewall 134.
    [048] In the illustrated embodiment, filter housing 114 is generally configured to be a reusable component of filter 100.
    [049] Filter cartridge 116 is configured to be a replacement repair component. As such, at standard maintenance intervals or when filter cartridge 116 is otherwise worn, filter cartridge 116 is removed from filter housing 114 through open end 138 and discarded. A new filter cartridge 116 is axially inserted into the filter housing 114 through the open end 138 and the filter element 104 is fixed to the filter base 102.
    [050] In the illustrated embodiment, the filter cartridge 116 includes a first end cap 142. Attached to the first end cap 142 is a cylindrical ring of filter means 144. At an opposite end of the cylindrical ring of filter means 144 is a second end cap 146 sealingly attached to the cylindrical ring of the filter means 144. The filter means 144 separates the dirty fluid inlet from the clean fluid outlet in such a way that the fluid flow through the system needs to pass through the filter means 144 without deviating from means 144 so that impurities are removed therefrom as the fluid flows through the filter 100 from the dirty fluid inlet 106 to the clean fluid outlet 108.
    [051] The filter element 104 includes a housing seal 146 that forms a radial seal between the first end cap 142 and the filter housing 114. The housing seal 146 forms part of an outer ring 148 of the filter cartridge that the filter housing 114 radially engages. The inner surface 150 of the filter housing 114 defines a radially inward sealing surface 152 that cooperates with the radially outer rim 148 of the filter cartridge 116, and particularly the housing seal 146.
    [052] The engagement between the housing seal 146 and the sealing surface 152 can provide a significant frictional engagement between the filter housing 114 and the filter cartridge 116. This frictional engagement can make removal of the filter cartridge difficult. 116 of the filter housing 114, at maintenance intervals. As such, when an operator attempts to remove filter cartridge 116 from filter housing 114, it may require large amounts of axial force which can result in splashing or spilling of fluids within filter element 104. Similarly, such removal in previous designs may require the user to manually pick up or engage the filter cartridge. This can expose the operator to the fluid within the filter element.
    [053] Typically, the engagement between filter housing 114 and filter cartridge 116 is such that filter cartridge 116 cannot be removed from filter housing 114 by simply tilting filter element 104 upside down such that the force of gravity would pull filter cartridge 116 out of filter housing 114.
    [054] Therefore, the illustrated embodiment incorporates an auto-eject interface between filter element 104 and filter base 102. The auto-eject interface is configured to carry filter cartridge 116 to a released position in relation to filter housing 114 , in which the filter cartridge 116 can be removed from the housing 114 with the use of a first amount of axial force (preferably gravity), from an inserted position, in which a second greater amount of axial force is required to move the cartridge filter 116 in relation to the housing 114, in relation to the filter housing 114. More particularly, the auto-eject interface transits the filter cartridge 116 to the position released from the inserted position as the filter element 104 is disassembled from the base filter 102 (i.e., transitioned from an assembled state to a disassembled state in relation to the filter base 102).
    [055] As the filter element 104 is transitioned from the assembled to the disassembled state, the auto-eject interface will transition the filter cartridge 116 from the inserted position to a released position where it can be easily removed from the filter housing 114. preferably, the released position of filter cartridge 116 is such that filter cartridge 116 can be removed from filter housing 114 by simply tilting filter housing 114 upside down and allowing gravity to remove the filter cartridge 116 of the filter housing 114. In the inserted position, the filter cartridge 116 preferably will not slide under the force of gravity in relation to the filter housing 114.
    [056] The auto-eject interface of the illustrated mode is provided by the cooperation of hook portions of the filter cartridge 116 and the filter base. The hook portion of the filter base 102 is provided by a pair of filter base contiguity shelves 158 that are part of the filter base 102. The hook portion of the filter element 104 is provided by the filter cartridge 116 and particularly by a pair of filter cartridge contiguity hook portions 160. The filter cartridge contiguity hook portions 160 axially engage the corresponding filter base contiguity shelves 158 and particularly the contiguity surfaces 190 thereof. turned axially in the direction opposite to the means of the cartridge 116 (see, for example, Figures 1, 2, 4 and 21). This engagement limits the movement of the filter cartridge 116 in relation to the filter base 102 as the filter element 104 is transitioned from an assembled state to an unassembled state. By limiting the movement of the filter cartridge 116, the filter cartridge 116 transitions from the inserted state to the released state as the filter element 104 is transitioned from the assembled state to the disassembled state along an assembly axis 162.
    [057] As the filter element 104 is rotated about the assembly geometric axis 162 to disconnect the filter element 104 from the filter base 102, the filter cartridge contiguity hook portions 160 will be in contiguity with the shelves contiguity of the filter base 158 and stop the axial movement of the cartridge 116 along the assembly axis 162. In the meantime, the continued rotation of the housing 114 around the assembly axis 162 will continue to transit the filter housing 114 in the direction contrary to the filter base in a general direction illustrated by arrow 164 (see Figure 1). Due to the fact that the movement of the cartridge 116 is limited in the axial direction along the assembly geometry axis 162, but the movement of the filter housing 114 is not, the filter housing 114 will move axially with respect to the filter cartridge 116 This movement will cause the outer ring portion 148 of the filter cartridge 116 to slide axially along the sealing surface 152 and disengage the sealing surface 152 from the housing 114 by sufficiently axial movement of the filter housing 114 with respect to the base. filter 102 along geometry axis 162.
    [058] In a preferred embodiment, the filter base 102 includes removal notches 168 angularly adjacent to the ends of the contiguity shelves of filter base 158 and angularly interposed between them (see Figures 4 to 7). The removal slots 168 are configured to allow the filter cartridge contiguity hooks 160 to axially pass through it when aligned with it to disengage the filter cartridge 116 from the filter base 102. Preferably, the filter cartridge contiguity hooks filter 160 are oriented with respect to the threads 120 of the filter housing 114 such that when the threads 120 of the filter housing 114 disengage the threads 122 from the filter base 102, the filter cartridge contiguity hooks 160 are aligned with a corresponding one of the removal slots 168 to allow axial removal of the filter element from the filter base. Alternatively, the threads 120 of the filter housing 114 can disengage from the threads 122 of the filter base 102 before the filter cartridge contiguity hooks 160 align at an angle with the removal notches 168. However, the user is then required to , rotate the housing 114 until the filter cartridge contiguity hooks 160 align with the removal notches 168.
    [059] In a preferred embodiment, referring in addition to Figure 3, the filter cartridge 116 includes an angled switching structure that cooperates with a corresponding switching structure of the filter housing 114 to properly align the contiguity hooks of an filter cartridge 160 in relation to the threads 120 of the filter housing in order to cause the filter cartridge contiguity hooks 160 to align with the removal notches 168 as the filter element 104 is being removed from the filter base 102. The switching arrangement in the illustrated embodiment is provided by a radially extending flap 170 formed adjacent to the outer rim 148 of the first end cap 142. The radially extending flap 170 will insert axially into radially formed grooves 172 formed in the inner surface 150 of filter housing 114. This engagement will prevent the angular movement of filter cartridge 116 in with respect to filter housing 114. Therefore, as filter element 104 is being rotatably attached or separate from filter base 102, filter cartridge 116 will remain in an angular position substantially coordinated with respect to filter housing 114.
    [060] Referring to Figure 4, filter cartridge contiguity hooks 160 generally include an axially extending leg portion 176 and a radially extending head portion 178. Head portion 178 extends radially to outside from a distal end of the leg portion 176 that forms a lower cut region 180 between the rim portion 148 and the head portion 178. The leg portion 176 is configured to flex radially inward toward the geometric axis 162 during the process of installing the filter element 104 in the filter base 102.
    [061] To promote bending radially directed into the leg portion 176, the filter cartridge contiguity hooks 160, and particularly the head portion 178 thereof, include a tapered end face 182 which is generally axially oriented in the direction away from the filter means 144. The tapered end face 182 also tapers radially inward when it moves axially in the direction away from the filter means 144. This tapered end face 182 also forms or acts as a cam surface that it will slide on the radially inner edge portions 184 of the filter base contiguity shelves 158 as the filter element 104 is mounted on the filter base 102.
    [062] The lower cutting region 180 of the filter cartridge contiguity hooks 160 is formed between a contiguity surface 186 of the head portion 178 and a top surface 188 of the outer rim portion 148. The contiguity surface 186 in The filter means 144 is axially facing axially. In the assembled state, contiguity surface 186 will be axially facing a corresponding contiguity surface 190 of the filter base contiguity shelf 158. Contiguity surface 190 is axially facing in the opposite direction to the filter means 144 or towards filter base 102 when filter element 104 is attached to filter base 102. As such, contiguity surfaces 186, 190 are axially facing each other when filter element 104 is mounted on filter base 102. When filter element 104 is removed from filter base 102, contiguous surfaces 186, 190 filter element 104 moves axially in the direction away from the filter base along geometry axis 162 in the disassembly direction 164 to limit the axial movement of the filter cartridge with respect to filter base 102.
    [063] Although the filter base contiguity shelves 158 and the current filter cartridge contiguity hooks 160 are configured in such a way that the filter base contiguity shelves 158 are flanges that extend radially inward and the hooks filter cartridge contiguity 160 include the radially outward head portion 178, these arrangements could be inverted such that the head portion 178 extends radially inward and the filter base contiguity shelves 158 extend radially to outside.
    [064] In primary reference to Figures 4 to 10, the process of assembling the filter element 104 on the filter base 102 will be described. The user will first install the filter cartridge 116 in the filter housing in such a way that the filter cartridge 116 is in the inserted position with the housing seal 146 engaged on the sealing surface 152 and the key 170 in the slot 172.
    [065] The user will then start to screw the housing 114 into the filter base 102 (see Figures 5 and 8). At this time, it is preferable that the filter cartridge contiguity hook 160 is not axially in contiguity with the filter base contiguity shelf 158 on the opposite side 190. This allows the initial engagement between cooperating threads 120, 122 to be easily started without interference by the auto-eject interface. Referring to Figures 6 and 9, the filter element 104 was rotated angularly about the geometric axis 162 and was pulled axially towards the filter base 102 in such a way that the filter cartridge contiguity hooks 160 were in contiguity with the filter base contiguity shelves 158. Additionally, leg portion 176 has been flexed radially inward as the tapered end face slides along radially inner edge portion 184. This flexion allows the filter cartridge contiguity hook 160 pass axially past the filter base contiguity shelf 158 as the filter element 104 is mounted on the filter base 102 and transitioned towards the mounted state. Referring to Figures 7 and 10, after the filter cartridge 116 has moved a sufficient distance along the assembly axis 162, the head portion 178 will pass the filter base contiguity shelf 158 in such a way that the surfaces contiguity 186, 190 are axially facing each other as discussed above. The leg portions 176 will spring out such that the inner edge portion is positioned radially within the lower cut region 180. In that state, the filter element 104 is in the assembled position.
    [066] To remove filter element 104 from filter base 102, the user will rotate filter element 104 in the opposite direction to the assembly of filter element 104. As filter element 104 rotates relative to filter base 102, the head portion 178 and, in particular, the contiguity surface 186 of the head portion 178 of the filter cartridge contiguity hooks 160 will slide along the contiguity surfaces 190 of the filter base contiguity shelf 158. As filter element 104 is being rotated, filter housing 114 is being moved axially against the filter base along geometry axis 162. However, engagement between contiguous surfaces 186, 190 prevents corresponding axial movement of the cartridge filter 116. As such, filter cartridge 116 moves axially with respect to filter housing 114.
    [067] The filter element 104 will be rotated a sufficient angular distance until the filter cartridge contiguity hooks 160 are located inside the removal slots 168. At that time, the threads 120, 122 will disengage and the filter element 104 can be removed from filter base 102. Additionally, at that time, filter cartridge 116 has been transitioned to the released state. During the removal process, the filter cartridge 116 travels a first distance parallel to the geometry axis 162 in relation to the housing 114 between the released position and the inserted position. The filter housing 114 travels at least that first distance parallel to the geometry axis 162 as the filter housing 114 is axially translated due to the interaction between the threads 120, 122.
    [068] The user can then easily remove filter cartridge 116 from filter housing 114, preferably by simply tilting filter housing 114 upside down (e.g., inversion of filter housing 114).
    [069] Some other features of the system will also be identified. With reference to Figures 5 to 7, the angular dimension α of the contiguity hooks 160 is smaller than the angular dimension β of the removal notches 168 as well as the angular dimension θ of the filter base contiguity shelves 158.
    [070] Additionally, a radial distance R1 of the radially outermost portion of the contiguity hooks 160 from the geometric axis 162 is greater than the radial distance R2 of the inner edge portion 184 of the contiguity shelves 158.
    [071] In the illustrated embodiment, the first end cap 142 includes an axially extending central part 194 and carries the seal 196. The seal 196 radially seals a sealing surface 198 provided by the filter base 102. The contiguity hooks 160 they are positioned radially between the radially outer rim 148 and the central part 194.
    [072] In one embodiment, as shown in Figures 1 and 2, a coil spring 197 is axially interposed between the filter element 104 and the filter housing 114. The coil spring 197, when compressed, axially guides the filter element 104 in a direction extending from the closed bottom 136 towards the open end 138 of the filter housing 114. The coil spring 197 is used to reduce the amount of axial engagement force required between contiguity hooks 160 and shelves 158 to superimpose the frictional forces between the filter cartridge 116 and the housing 114. The force provided by the coil spring 197 is preferably not large enough to cause the filter cartridge 116 to eject from the filter housing 114 when the element filter 104 is removed from filter base 102.
    [073] All references, which include publications, patent applications and patents mentioned in the present invention, are hereby incorporated by reference to the same point that each reference was individually and specifically indicated as being incorporated by reference and presented in its entirety in this document.
    [074] The use of the terms "one" and "one" and "o (a)" and similar referents in the context of describing the invention (especially in the context of the following claims) should be interpreted as encompassing the singular and the plural, except if otherwise indicated in this document or clearly contradicted by the context. The terms "that understands", "that has", "that includes" and "that contains" are to be interpreted as terms of free interpretation (ie, that mean "that includes, but not limited to,") unless otherwise indicated. another way. The mention of ranges of values in this document is merely intended to serve as a shorthand method of individual reference to each separate value that falls within the range, unless otherwise indicated in this document and each separate value is incorporated in the specification as being individually mentioned in this document. All methods described in this document may be performed in any appropriate order unless otherwise indicated in this document or otherwise clearly contradicted by the context. The use of any and all examples or exemplary language (for example, "such as") provided in this document is intended merely to better clarify the invention and does not impose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be interpreted as indicating any element not claimed as essential to the practice of the invention.
    [075] The preferred embodiments of this invention are described in the present document, which includes the best known way for the inventors to carry out the invention. The variations of these preferential modalities can become evident to the elements of common knowledge in the technique by reading the above description. The inventors expect the versed elements to employ such variations as appropriate and the inventors intend for the invention to be put into practice in another way as specifically described in this document. Accordingly, this invention includes all modifications and equivalents of the subject mentioned in the appended claims to this document as permitted by applicable law. In addition, any combination of the elements described above in all possible variations thereof is covered by the invention unless otherwise indicated in this document or otherwise clearly contradicted by the context.
    权利要求:
    Claims (19)
    [0001]
    1. Filter (100) comprising: a filter base (102); a filter element (104) selectively mountable to the filter base (102), the filter element (104) including: an outer housing (114) including a side wall (134) defining an open end (138); a filter cartridge (116) axially received within the filter housing (114) slidable between a released position in relation to the housing (114) where the filter cartridge (116) can be removed from the housing (114) by applying a first amount of axial force and a position inserted in relation to the housing (114) where the application of a second amount of force, greater than the first amount of force, is required to axially transit the filter element (104) in relation to the filter housing (114) for the released position, the filter cartridge (116) including filter means (144) for filtering fluid through the filter element (104), FEATURED further comprising: a self-eject interface provided between the filter element (104) and the filter base (102) configured to transition the filter cartridge (116) to the position released from the inserted position as the filter element (104) is transitioned from an assembled state p for a disassembled state in relation to the filter base (102).
    [0002]
    2. Filter (100), according to claim 1, CHARACTERIZED by the fact that the filter cartridge (116) engages the housing (114) in the inserted state with sufficient force to prevent the filter cartridge (116) from being carried over from the inserted position to the position released under the force of gravity when the filter element (104) is removed from the filter base (102) and inverted.
    [0003]
    3. Filter (100) according to claim 1, CHARACTERIZED by the fact that the auto-eject interface includes a filter base contiguity shelf (158) and a filter cartridge contiguity hook (160), the hook filter cartridge contiguity (160) axially engages the filter base contiguity shelf (158) axially limiting movement of the filter cartridge (116) in relation to the filter base (102) according to the filter element (104). transitioned from the assembled state to the disassembled state, such that the filter cartridge (116) transitions from the inserted state to the released state as the filter element (104) is transitioned from the assembled state to the disassembled state along an axis geometric assembly (162).
    [0004]
    4. Filter (100) according to claim 3, CHARACTERIZED by the fact that the filter base contiguity shelf (158) includes a first contiguity surface (190) facing axially in the direction opposite to the filter means (144 ) when the filter element (104) is attached to the filter base (102) and the filter cartridge contiguity hook (160) includes a second contiguity surface (186) axially facing the filter means (144), the first contiguity surface (190) engages the second contiguity surface (186) when the filter cartridge contiguity hook (160) axially engages the filter base contiguity shelf (158).
    [0005]
    5. Filter (100) according to claim 3, CHARACTERIZED by the fact that the filter base contiguity shelf (158) extends angularly around the geometric assembly axis (162) of the filter (100) by a greater quantity than the filter cartridge contiguity hook (160), in which the filter element (104) transitions from the assembled state to the disassembled state along the assembly geometric axis (162).
    [0006]
    6. Filter (100) according to claim 3, CHARACTERIZED by the fact that the filter cartridge contiguity hook (160) includes an axially extending leg portion (176) and a head portion (178) radially extending out of the leg portion (176), the filter base contiguity shelf (158) including a radially inwardly extending flange portion, the radially inwardly extending flange portion and hook extending radially outwardly engaging axially when the filter cartridge contiguity hook (160) axially engages the filter base contiguity shelf (158).
    [0007]
    7. Filter (100) according to claim 6, CHARACTERIZED by the fact that the leg portion (176) is configured to flex radially to adjust the radial position of the hook portion to allow the hook portion to pass axially beyond from the flange portion that extends radially inward as the filter element (104) moves axially along the mounting geometry axis (162) to the assembled state while the filter element (104) is mounted on the filter base ( 102).
    [0008]
    8. Filter (100) according to claim 7, CHARACTERIZED by the fact that the filter housing (114) includes at least one housing thread (120) that cooperates with at least one filter base thread (122) from the filter base (102) to selectively mount the filter element (104) on the filter base (102) by rotating the housing (114) around the geometric mounting axis (162) in a first angular direction, cooperation between the filter base thread (122) and the housing thread (120) causing the filter element (104) to be pulled axially towards the filter base (102) along the mounting geometric axis (162) according to the housing (114) it is rotated about the geometric axis of assembly (162) in the first angular direction.
    [0009]
    9. Filter (100), according to claim 8, CHARACTERIZED by the fact that the filter cartridge (116) travels for a first distance parallel to the assembly geometric axis (162) in relation to the housing (114) between the position released and the position inserted and in which the filter housing (114) translates at least for the first distance parallel to the assembly axis (162) in relation to the filter base (102) between the assembled state and the disassembled state.
    [0010]
    10. Filter (100) according to claim 6, characterized in that it additionally comprises a removal notch (168) angularly adjacent to one end of the flange portion extending radially inward, the removal notch (168 ) configured to allow the head portion (178) to pass axially through it when the head portion (178) is angularly aligned with it to disengage the filter cartridge (116) from the filter base (102).
    [0011]
    11. Filter (100) according to claim 1, CHARACTERIZED by the fact that the filter cartridge (116) is slidable in relation to the housing (114) on a sliding interface, the sliding interface including an annular seal (146) radially directed that slides on an annular surface (152), the annular seal (146) engaging the annular surface (152) in the inserted position and the annular seal (146) disengaged from the annular surface (152) in the released position.
    [0012]
    12. Filter (100), according to claim 11, CHARACTERIZED by the fact that the friction on the sliding interface is sufficient to prevent the filter cartridge (116) from being moved from the inserted position to the position released under the force gravity when the filter element (104) is removed from the filter base (102) and inverted.
    [0013]
    13. Filter (100) according to claim 3, CHARACTERIZED by the fact that the filter base (102) includes an annular skirt (124) that extends angularly around and axially parallel to the geometric assembly axis (162 ), the annular skirt (124) receiving the open end (138) of the side wall (134) of the housing (114) axially there, the housing (114) includes at least one housing thread (120) which cooperates with at least a filter base thread (122) formed on the annular skirt (124) of the filter base (102) to selectively mount the filter element (104) on the filter base (102) by rotating the housing (114) around of the mounting geometry axis (162) in a first angular direction, the cooperation between the filter base thread (122) and the housing thread (120) causing the filter element (104) to be pulled axially towards the filter base (102) along the assembly axis (162) as the housing (114) is rotated around the geometric axis of assembly (162) in the first angular direction, the filter cartridge contiguity hook (160) being provided by the filter cartridge (116).
    [0014]
    14. Filter (100) according to claim 13, CHARACTERIZED by the fact that the filter cartridge (116) includes an end cap (142) positioned close to the open end (138) of the housing (114) in the inserted position , the end cap (142) including the filter cartridge contiguity hook (160).
    [0015]
    15. Filter cartridge (116), for a filter (100) as defined in any one of claims 1 to 14, CHARACTERIZED in that it comprises: a tubular ring of filter means (144); a first end cap (142) attached to a first end of the filter means (144); a filter cartridge contiguity hook (160) including an axially extending leg portion (176) and a head portion (178) extending radially from the leg portion (176), the head portion ( 178) extending radially defining a contiguity surface (186) facing axially towards the filter means (144); and a first seal (146) directed radially outwardly close to a radially outer rim (148) of the first end cap (142) to seal the end cap (142) to a filter housing (114); and a central part (194), the central part (194) carrying a second seal (196) to seal with a filter base (102), the filter cartridge contiguity hook (160) being radially positioned between the first and second seals (146, 196).
    [0016]
    16. Filter cartridge (116) according to claim 15, CHARACTERIZED by the fact that the filter cartridge contiguity hook (160) is part of the first end cap (142), the leg portion (176) extending axially outwardly from a body portion of the first end cap (142) and in the opposite direction to the filter means (144), the head portion (178) extending radially over a portion of the body portion and forming a lower cut region (180) between them.
    [0017]
    17. Filter cartridge (116) according to claim 16, CHARACTERIZED by the fact that the head portion (178) has an axially tapered end face (182) which is generally turned axially in the direction opposite to the means filter (144).
    [0018]
    18. Filter cartridge (116) according to claim 17, CHARACTERIZED by the fact that the axially tapered end face (182) also faces radially outwards and in the opposite direction from a center of the filter cartridge ( 116).
    [0019]
    19. Filter cartridge (116) according to claim 17, CHARACTERIZED by the fact that the axially tapered end face (182) also faces radially inward and towards a center of the filter cartridge (116).
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    EP2806961A4|2015-12-23|
    EP2806961A1|2014-12-03|
    CN104245084A|2014-12-24|
    US9884279B2|2018-02-06|
    US20130193054A1|2013-08-01|
    US8709247B2|2014-04-29|
    AU2013212254A1|2014-08-14|
    US20180117509A1|2018-05-03|
    JP2015509047A|2015-03-26|
    MX2014009074A|2014-09-12|
    WO2013112572A1|2013-08-01|
    US20140183115A1|2014-07-03|
    CN104245084B|2016-12-07|
    US11235268B2|2022-02-01|
    JP6250559B2|2017-12-20|
    AU2013212254B2|2017-05-11|
    CN106925025A|2017-07-07|
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    法律状态:
    2018-03-27| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-09-03| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-08-25| B07A| Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]|
    2021-01-05| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-02-02| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 23/01/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/360,181|US8709247B2|2012-01-27|2012-01-27|Filter apparatus with ejection arrangement|
    US13/360.181|2012-01-27|
    PCT/US2013/022732|WO2013112572A1|2012-01-27|2013-01-23|Filter apparatus with ejection arrangement|
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