• 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:
    SAW, SAW BLADE AND CONNECTION MECHANISM. The present disclosure relates to a saw (100) comprising a drive mechanism (110), a first blade (220) configured to oscillate around an axis perpendicular to a plane defined by a surface of the first blade (220) , a second blade (240) configured to oscillate around an axis perpendicular to the plane in a direction opposite to that of the first blade (220) and wherein the gear (120, 140) is provided between the drive mechanism (110) and to the first and second blades (220, 240) to reduce the speed of oscillation of the blades. A saw blade, a connecting mechanism for connecting a blade to a saw, and associated methods are also provided.
    公开号:BR112015000632B1
    申请号:R112015000632-9
    申请日:2013-07-09
    公开日:2021-06-08
    发明作者:Azagen Mootien；Daniel Herzog
    申请人:Synthes Gmbh；
    IPC主号:
    专利说明:

    REFERENCE TO RELATED DEPOSIT REQUESTS
    [001] This application claims the benefit of the provisional patent application under serial number 61/670,914 filed on July 12, 2012 and the provisional patent application under serial number 61/692,869 filed on August 24, 2012, all disclosures of each application are hereby incorporated by reference for all purposes. FIELD OF TECHNIQUE
    [002] The present disclosure relates to saw blades, a connecting mechanism for connecting a saw blade to a saw, a saw, a cutting method and a method of removing the saw blades from a saw. BACKGROUND
    [003] Motor-equipped saws are often used in surgical procedures, particularly osteotomies. It is desirable to apply a high torque to the bone through the blades of a saw during the cutting procedure to improve the accuracy of the cut and reduce the time it takes to perform the procedure. Furthermore, the cutting efficiency can be affected by the oscillation frequency of the saw blades, if the saw frequency is similar to that of the bone, the cutting performance would be zero. US Patent No. 5,846,244 discloses a counterbalanced oscillating saw in which the moment produced by a blade is compensated by the moment produced by its cutting blade counterpart to reduce mechanical vibration, rotational and linear movement of the saw.
    [004] Surgical saw blades are often used in sterile environments. Being useful to be able to supply disposable blades or blades that can be Petition 870200025251, of 02/21/2020, p. 5/32 2/19processed for reuse independently of the saw so that one saw can be reused while avoiding the expense or time of sterilizing the entire saw. However, it is important that any blades are securely attached to the handle during use to avoid the highly unsatisfactory consequences of blades that become loose during a cutting procedure. Therefore, it is desirable to provide a free-standing blade that is easily removable from the saw for processing, but that can be securely attached to the saw during use.
    [005] Thus, there is a need to provide an improved saw that can cut using high torque and prevent the object being cut from swinging in harmony with the saw, and blades that are independent of the saw, but can be securely connected to the saw. Mountain range. SUMMARY
    [006] In a first aspect of the present disclosure a saw blade is provided that includes a cutting edge at a distal end thereof. The saw blade may have a clamping portion at a proximal end of the blade that is configured to connect the blade to a saw and a projection that extends from the blade and is resiliently forced into a position where it extends in the opposite direction. of a blade surface. The saw blade can be configured to cut bone. The clamping portion and the projection can act together to allow the blade to be releasably attached to the saw. The projection can be positioned towards the proximal end of the blade. Projection can be integral with the blade. Alternatively, the projection can be a separate component attached to the blade. In one embodiment, the securing portion comprises a wrench-shaped head. The securing portion may also comprise a pair of Petition 870200025251, of 02/21/2020, p. 6/32 3/19arms that are substantially parallel to each other. The wrench-shaped head and pair of arms can define an inner surface that extends through an angle of between about 45° and about 75° with respect to a plane of the blade. In the exemplary embodiment, the angle can be about 60°. When the clamping portion is configured in this way, the blade clamping portion may be connected to a complementary angled surface to provide an interlocking thereto.
    [007] In a second aspect of the present disclosure, a connection mechanism for connecting a saw blade to a saw is provided. The connection mechanism may include a mounting member, for example a mounting portion, which defines a receiving surface and a raised portion. The blade can define an opening that extends through the blade. The blade may define a surface that can be slid into engagement with the receiving surface. The raised portion is/can be received by opening the blade. Engagement between the opening and the raised portion can prevent undesirable relative axial, i.e., longitudinal, movement of the blade with respect to the saw. In this way, the blade is configured to securely connect to the raised portion of the mounting portion without the need for additional components. In one embodiment, the blade may define an inner surface that defines the opening. Additionally, the raised portion can define an external surface. The opening inner surface and the outer surface of the raised portion may be complementary angled so as to provide an interlock between the blade and the raised portion of the mounting portion. Entanglement can prevent relative axial or longitudinal movement of the blade, which, although it causes vibrations between blade surfaces (for example, when two blades are used), allows the blade to slide in connection. Petition 870200025251, of 21/ 02/2020, p. 7/32 4/19with the saw. In one embodiment, the inner opening surface may extend at an angle of between 45° and 75° with respect to the plane of the blade. The angle of the opening inner surface to the plane of the blade is about 60°. As noted above, the blade may comprise two substantially parallel arms that at least partially define the opening. The configuration of the arms can allow the blade to be easily slid in connection with the saw. The blade may also comprise a locking projection which extends into a locking surface on the mounting portion to prevent removal of the blade from the mounting portion or saw. The locking projection can be resiliently forced into a position that extends away from the plane of the blade. As a result, the locking projection can be forced into the position where it extends into the locking surface. In this way, the blade can be securely connected to the mounting portion when it has been slid into engagement with the receiving surface thereof. The blade according to the second aspect of the present disclosure may be the saw blade according to the first aspect of the present disclosure. The saw can be a motor driven saw, a pneumatically driven saw or a manually driven saw.
    [008] In a third aspect of the present disclosure, a saw is provided that includes a drive mechanism, a first blade configured to oscillate around an axis that is perpendicular to the plane defined by a surface of the blade. The saw may include a second blade configured to oscillate around an axis that is perpendicular to the plane in a direction opposite to that of the first blade. The axes can be the same or each axis can be different. The gear is disposed between the Petition mechanism 870200025251, of 02/21/2020, p. 8/32 5/19drive and the first and second blades and is configured to reduce the speed of oscillation of the blades around their respective axes. Axes can be similar. The saw is thus configured to increase the speed of the torque transferred to the blade from the drive mechanism. The increased torque output on the blades acts to execute the cut, while the oscillating blades in the opposite direction reduce the torque, which can prevent the object being cut if it swings in harmony with the saw. The saw may further comprise an eccentric drive shaft pivotally connected to the drive mechanism, wherein the eccentric drive shaft acts to cause the first and second blades to oscillate. The eccentric drive shaft can be arranged perpendicular to the plane of each blade. The eccentric drive shaft configuration allows for symmetrical industrial design of the saw. The gear may comprise at least one gear, for example a 90° gear transmission or a planetary gear. The 90° gears allow the drive mechanism to be arranged parallel to the plane of the blade. The 90° gear transmission can provide a gear ratio of 1:1.5. Regardless of the specific gear type or amount of gear, the blade oscillation speed can be between 7,000 to 10,000 rpm or 8,000 to 10,000 rpm. In an exemplary modality, the blade oscillation speed is about 7,000 rpm. Although the saw can run at slower speeds, for example 2,000 to 3,000 rpm, there is a tendency among surgeons to apply considerable pressure to the bone using the saw. At lower saw speeds, this trend limits saw power. Operating the saw at swing speeds of 7,000 rpm compensates for this trend. In an alternative modality, Petition 870200025251, of 02/21/2020, p. 9/32 6/19gear may comprise a planetary gear or a bevel gear. A planetary or bevel gear acts effectively to provide high torque at low speeds to the blades from the drive mechanism. In this embodiment, the 90° gear transmission can provide a gear ratio of 1:1.3846. The gear can provide a gear ratio of 1:3.9474 and the blade oscillation speed can be between 2000 to 3000 rpm. The gear allows the blades to operate at lower speeds, thus generating less heat. The drive mechanism can be a motor drive. In addition, the saw may include a drive mechanism location configured to support, for example, at least partially support the drive mechanism.
    [009] As noted above, according to the third aspect of the revelation, the blades oscillate around the same axis. Furthermore, the blades can be detachably attached to the saw. The saw is designed to cut bone. In addition, the blades may include a first and a second blade which comprise the blades of the first aspect of the present disclosure. The saw may further comprise a connection mechanism in accordance with a second aspect of the present disclosure.
    [0010] In a fourth aspect of the present disclosure, a cutting method is provided which comprises the step of transferring torque from a drive mechanism for the first and second blades to oscillate the first and second blades in opposite directions relative to each other. The method includes the step of transferring the movement of the drive mechanism, through a gear, so as to reduce the speed of oscillation of the first and second blades. The gear increases the torque output to the blades from the drive mechanism, which Petition 870200025251 of 02/21/2020, p. 10/32 7/19improves blade cutting skill. Swinging the first and second blades in opposite directions can prevent the object being cut from swinging in harmony with the blades. The method may comprise the step of transferring torque from a drive mechanism to an eccentric drive shaft which causes the first and second blades to oscillate. The method may further comprise the step of transferring motion through a 90° gear transmission between the drive mechanism and the first and second blades. The method may also comprise the step of transferring motion through a planetary gear that is disposed between the drive mechanism and the blades. The drive mechanism can be a motor drive, a pneumatic drive mechanism, or a manual drive mechanism. The method can include cutting bone. The method according to the fourth aspect of the disclosure may include the blade according to the first aspect of the disclosure, the connecting mechanism according to the third aspect of the disclosure and the saw according to the third aspect of the disclosure.
    [0011] In a fifth aspect of the present disclosure a method of removing saw blades from a saw is provided. The method comprises the step of moving a resiliently forced locking member of a blade from a first position in which it engages a mounting member of the saw to a second position in which it no longer engages the mounting member and removing the blade axially from the mounting member. The blade can be easily removed from the saw by sliding it out of engagement with a mounting member once a locking member has been moved from a locking position. The method according to the fifth aspect of the disclosure may include the blade according to the first aspect of the disclosure, the connecting mechanism. 11/32 8/19according to the third aspect of the revelation and/or the saw according to the third aspect of the revelation.
    [0012] A sixth aspect of the present disclosure provides use of a saw as described above in a procedure for cutting bone. BRIEF DESCRIPTION OF THE DRAWINGS
    [0013] The aforementioned summary, as well as the following detailed description of the illustrative embodiments of the devices and methods of the present application, will be better understood when read in conjunction with the attached drawings. For purposes of illustrating the device and methods of the present application, illustrative embodiments are shown in the drawings. It should be understood, however, that the application is not limited to the precise provisions and instruments shown. In the drawings:
    [0014] Figure 1A is a cut-away perspective view of a saw equipped with a motor according to an embodiment of the present disclosure;
    [0015] Figure 1B is a sectional side elevation view of a saw equipped with a motor similar to the saw equipped with a motor illustrated in Figure 1A, but constructed according to an alternative embodiment;
    [0016] Figure 1C is a side elevation view of an eccentric shaft of the motor-equipped saw illustrated in Figures 1A to B;
    [0017] Figure 2 is a perspective view of a proximal end of a saw blade according to an embodiment of the present disclosure;
    [0018] Figure 3 is a perspective view of a dismounting member according to an embodiment of the present disclosure;
    [0019] Figure 4A is a cut-away perspective view of the connecting mechanism according to an embodiment of the present Petition 870200025251, of 02/21/2020, p. 12/32 9/19disclosure, illustrating the blade shown in Figure 2 engaged with the connecting mechanism shown in Figure 3;
    [0020] Figure 4B is a bottom plan view of the connection mechanism illustrated in Figure 4A;
    [0021] Figure 5 is a sectional perspective view of a portion of the connection mechanism according to an embodiment of the present disclosure;
    [0022] Figure 6 is a bottom plan view of the proximal end of a saw blade shown in Figure 2; and
    [0023] Figure 7 is a cross section of the proximal end of the saw blade along line B-B in Figure 6. DETAILED DESCRIPTION OF ILLUSTRATIVE MODALITIES
    [0024] Referring to Figure 1A, a saw equipped with a motor 100 that has a drive mechanism location that is configured to support a motor drive 110 that is functionally connected to the eccentric shaft 140 through a gear. The motor-equipped saw 100 may include the motor drive 110, for example at the drive mechanism location as illustrated in Figure 1A or the drive mechanism location may define a receptacle 111 (see Figure 1B) that is configured to receive , for example, detachably receiving a drive mechanism such as a motor drive. The saw 100 may include a handle portion or handle 102 and a cutting portion 104 spaced from the handle portion 102 along the longitudinal direction L. The saw 100 may include a housing 107 for carrying at least a portion of the mechanism. 110 drive and gear. Housing 107 may at least partially define receptacle 111.
    The saw 100, or the cutting portion 104, may include a Petition 870200025251, dated 02/21/2020, p. 13/32 10/19first blade 220 and a second blade 240. First and second blades 220 and 240 include a proximal end 252 and 352, respectively, each of which is configured to attach to the saw (detailed below) and a distal end 254 and 354, respectively, spaced apart from the proximal end 252 and 352 along the longitudinal direction L when the blades are clamped to saw 100. The proximal ends of the blades may define the respective blade clamping portions. The first blade 220 includes a first or an upper surface 256 and a second or a lower surface 258 spaced from the first surface 256 along the transverse direction T. The transverse direction T may be substantially perpendicular to the longitudinal direction L of the saw 100. Blades 220, 240 can extend along the longitudinal direction L and have a transverse directional component. Furthermore, second blade 240 includes a first or an upper surface 356 and a second or lower surface 358 spaced from the first surface 356 along the transverse direction T. Each of the respective blade surfaces extends between the proximal end 252 , 352 and the distal end 254, 354 of the blades 220, 240 and may define respective planes extending along the longitudinal direction L. The blades 220, 240 each comprise a cutting portion 221, 241 disposed at the end. distal 254, 354 thereof, which is positioned distal to blade attachments 320, 340 along the longitudinal direction L when the blade is connected to saw 100. In order to cut an object, the first and second blades 220, 240 are configured to attach to the saw 100 so that they oscillate around a similar axis or, alternatively, around different axes. For example, the first and second blades 220 and 240 may oscillate around an axis that is perpendicular to a plane defined by any one of Petition 870200025251, of 02/21/2020, p. 14/32 11/19Respective surfaces of each respective blade, so that the blades oscillate in an oscillating direction O. As further detailed below, the first and second blades 220, 240 oscillate in opposite directions.
    [0026] Blades 220, 240 may be detachably connected to saw 100 via blade clamps 320, 340 which are configured to hold blades 220, 240 in parallel planes extending along the longitudinal direction L. Blade clamps 320, 340 each have a first pair of arms 320a and 320b and a second pair of arms 340b, 340b (Figures 1C and 4B) that surround the eccentric shaft 140 (see also Figure 1C). The eccentric shaft 140 is disposed along a transverse direction T, which is perpendicular to the blades 220, 240 and blade attachments 320, 340. The gear is provided between the drive mechanism location and the first and second blades 220, 240 to reduce the oscillation speed of the blades 220, 240. The gear may include one or both of a planetary gear 120 and a transmission gears at 90° 130.
    [0027] In use, torque is transferred from drive mechanism 110 through planetary gear 120 and 90° gear transmission 130 to rotate eccentric shaft 140 around a center shaft shaft 140a. As shaft 140 rotates it converts the rotary motion of drive mechanism 110 into oscillation of blades 220, 240 through blade clamps 320 and 340. Blade clamps 320 and 340 define respective center shafts 329 and 339 that are spaced apart at relation to the center shaft 140a and can be arranged in opposition to each other so that the center shaft 140a is disposed between the center shafts 329 and 339. The eccentric shaft 140 is configured so that, when rotating, it moves the first pairs Petition 870200025251, of 02/21/2020, p. 15/32 12/19of arms 320a and 320b and a second pair of arms 340a and 340b of the clamping mechanism in opposite directions, thereby oscillating the blades in opposite directions 0 relative to one another. The eccentric shaft 140 has a center portion 150, a first offset portion 152 and a second offset portion 154. The center portion 150 extends along the center shaft axis 140a. First offset portion 152 and second offset portion 154 extend along respective center offset axes (not shown) which rest in a similar plane with respect to center axes 339 and 329. First pairs of arms 320a and 320b attach to compensating portion 154 and the second pair of arms 340a and 340b attach to compensating portion 152. Blades 220, 240 are attached to the saw so that the blades oscillate around the same axis, e.g. of central axis 140a, which extends along the transverse direction T. For example, the central axis axis 140a may extend along the transverse direction T and is substantially perpendicular to the first blade surfaces 256 and 258 and/or to the second blade surfaces 356 and 358. Blades 220, 240 are securely connected to blade attachments 320, 340, as described below, so that torque is transferred from the drive mechanism to blades 220 and 240.
    [0028] The planetary gear 120 achieves a reduction in the speed of the drive mechanism transmitted to the blades and, conversely, an increase in torque. The ratio of the speed reduction along one direction from the drive mechanism 110 to the blades 220, 240 caused by the planetary gear is 1:3.9474, although it should be noted that the speed reduction caused by the gear planetary can be configured as desired, for example between 1:1.1 and 1:10. Petition 870200025251, of 02/21/2020, p. 16/32 13/1990° gear transmission 130 may include a first or an input gear 131, which may be a bevel gear, and a second or an output gear 133, which may be a bevel gear, which is interleaved with the first gear 131. The planetary gear 120 can be disposed between the drive mechanism location (and thus the motor drive 110) and the 90° gear transmission 130. The 90° gear transmission can be disposed between the planetary gear 120 and the eccentric shaft 140.
    [0029] During operation, the first gear 131 rotates around a first rotation axis 331 (Figure 1A) and the second gear 133 rotates around a second rotation axis 333 that is angularly displaced, for example, oriented substantially 90° ° with respect to the first axis of rotation 331. The first gear 131 is coupled to the drive mechanism 110. The first gear 131 is configured to be driven to rotate the drive mechanism 110 along the first axis of rotation and the second gear 133 is coupled to shaft 140 so as to drive the shaft to rotate about a corresponding axis of rotation which may be parallel or coincident with the second axis of rotation. Thus, first gear 131 is disposed between second gear 133 and drive mechanism 110, and second gear 133 is disposed between shaft 140 and first gear 131. Second gear 133 is configured to drive eccentric shaft 140 to rotate, thus causing the blades 220, 240 to oscillate reciprocally. The first gear 131 may be sized smaller than the second gear 133 and may thus have fewer teeth than the second gear 133. Consequently, the second gear 133 rotates at a speed that is less than that of the first gear 131 and appetition 870200025251 , of 02/21/2020, p. 17/32 14/19a torque that is proportionally greater than that of the first gear 131. According to a modality, the gear ratio can be as desired, for example, between 1:1.1 and 1:2. According to the illustrated embodiment, the gear ratio can be 1:1.3846. The 90° gear transmission gear reduction produces a corresponding reduction in speed that equals the gear ratio and a corresponding increase in torque output that equals the gear ratio. When the planetary gear speed reduction ratio is 1:3.9474 and the speed reduction ratio of the 90° gear transmission is 1:1.3846, the saw equipped with 100 motor produces a speed reduction ratio from drive mechanism 110 to eccentric shaft 140 of approximately a ratio of 1:5.4656. Although a planetary gear is illustrated, it may also be possible to use a bevel gear instead.
    [0030] Planetary gear 120 acts to provide high torque for blades 220, 240 at low speed. In this way, the blades can be operated at low speed but with high torque. Blades cut with torque, not speed, and less heat is transmitted to the bone. Furthermore, because the cut is performed by the two blades that are oscillating in opposite directions around the same axis, for example, the central axis axis 140a, limiting, if any, the vibration resulting from the bone or contractorque transmitted to the handle 102. Once limited, if any, the contractor is transmitted to the handle, making tool handling easier, resulting in a more accurate cut. The entire speed of the saw blades is between 2000 to 3000 rpm.
    [0031] In an alternative saw mode, the planetary or bevel gear can be omitted so that there is a direct drive between the 90° gear transmission 130 and Petition 870200025251, of 02/21/2020, p. 18/32 15/19the blades 220, 240. For example, with reference to Figure 1B, the motor-equipped saw 100 defines a receptacle 111 which can provide drive mechanism location. Receptacle 111 is configured to receive a drive mechanism, such as a motor drive, at the drive mechanism location, where the drive mechanism is operable to rotate at a desired speed and produce a corresponding torque output. The saw equipped with motor 100 can be devoid of the planetary gear shown in Figure 1A so that the speed and torque output of the motor drive are communicated to the first gear 131 of the gear transmission at 90° 130. first gear 131 can be driven to rotate at substantially the same speed as the motor drive at substantially the same torque that is emitted from the motor drive. As described above, the first gear 131 may be smaller in size than the second gear 133 and may therefore have fewer teeth than the second gear 133. Consequently, the second gear 133 rotates at a speed that is less than that of the first. gear 131 and at a torque that is proportionally greater than that of the first gear 131. According to an embodiment, the gear ratio can be as desired, for example, between and including approximately 1:1.1 and approximately 1:5, including approximately 1:1.3846, approximately 1:1.5, or any alternative suitable gear ratio as desired. Gear reduction of the 90° 130 gear transmission produces a corresponding reduction in speed that equals the gear ratio and a corresponding increase in torque output that equals the gear ratio. Furthermore, according to the mode illustrated in Figure 1B, the gear ratio of the transmission of Petition 870200025251, of 02/21/2020, p. 19/32 16/19gears at 90° 130 can define the gear ratio, and thus the speed reduction and torque increase, between the motor drive and the blades.
    [0032] The emitted speed of the oscillation of the blades 220, 240 can be between 7,000 to 10,000 rpm, including 8,000 rpm to 10,000 rpm. According to a saw mode equipped with a 100 motor, the blade oscillation speed can be 7,000 rpm.
    [0033] Blades 220, 240 and corresponding blade clamps 320, 340 can be symmetrical. Therefore, a saw 100 is provided which can have two blades configured in identical ways. It should be understood that blades can have different configurations as needed. For the purpose of illustrating the configuration of the first and second blades 220 and 240, only blade 220 will be detailed further below. It should be understood that the features described herein with respect to the first blade 220 are applicable to the second blade 240. Furthermore, the features described herein with respect to the blade attachment 320 are applicable to the blade attachment 340.
    [0034] Referring to Figures 2, 3 and 6, the proximal end252 of the blade 220 has a wrench shaped head 222. The wrench shaped head 222 defines an opening 223 that extends along a longitudinal direction L. For example, head 222 has two arms 223a and 223b that are spaced apart and extend substantially parallel to each other. Arms 223a and 223b define and at least partially surround opening 223. Proximal end 252 of blade 220 also comprises a projection 227 that extends from surface 258 (or 256) of blade 220 along a transverse direction T. Projection 227 may be a stop that is milled from blade 220 and is flexed backwards along the transverse direction T so that Petition 870200025251, of 02/21/2020, p. 20/32 17/19 is resiliently forced into a position in which it extends from surface 258 of blade 220.
    [0035] Referring to Figure 3, the blade attachment 320 includes a mounting member 321, for example a mounting portion 321. The mounting portion 321 has a receiving surface 322 and a raised portion 323, for example a portion that has risen with respect to receiving surface 322 along the transverse direction T. Raised portion 323 is configured to match the shape of aperture 223 of blade 220 shown in Figure 2. Blade 220 can thus be slid into engage with receiving surface 322 so that arms 223a and 223b encircle raised portion 323 of mounting portion 321 (Figure 4A) as shown in Figure 4.
    [0036] Referring to Figures 2, 6 and 7, the blade 240 may define an inner surface 225, at least partially defining the opening 223. The inner surface 225 may extend from the upper blade surface 256 to the surface of lower blade 258 and along spaced arms 223a and 223b to define a U-shape. The inner surface 225 of arms 223a, 223b of blade 220 is angled relative to lower surface 258 or the plane of blade 220. In one embodiment, the angle of the inner surface 225 to the plane of the blade is about 60°. As can be seen in Figure 3, the mounting portion 321 may also define an outer surface 325 extending from the raised portion 323 to the receiving surface 322. The outer surface 325 of the raised portion 323 is angled relative to the portion. raised 323 to define a complementary angle with respect to the inner surface 225 of the blade 220. Thus, the outer surface 325 of the raised portion 323 and the inner surface 225 of the arms 223a and 223b intertwine when the blade aperture 223 is slid into engagement. 870200025251, of 02/21/2020, p. 21/32 18/19river with raised portion 323 as shown in Figures 4A to B. As a result, movement with respect to the blade surface is effectively prevented so that vibration between the two blade surfaces is minimized.
    [0037] Referring to Figures 2 and 3, the receiving surface 322 has an opening 327 that is positioned distal to the raised portion 323 along the longitudinal direction L. The opening 327 is configured to receive at least a portion of the projection 227. opening 327 can act as a locking surface, against which projection 227 of blade 220 locks once blade 220 has been slid into the position shown in Figures 4A to B. From that position, blade 220 cannot be moved axially, for example along the longitudinal direction L out of engagement with the mounting portion 321. The locking projection 227 is resiliently biased towards the locking surface. However, locking projection 227 is accessible through opening 327 through an opening on the opposite side of mounting portion 321 to receiving surface 322 (see, for example, opening 349 in Figure 5). As a result, it is possible to release the locking projection 227 from its first position in the opening 327 in which it is resiliently biased as shown in Figure 4A and 4B, into a second position in which the projection 227 no longer locks against the locking surface. When the projection is in the second position, the blade 220 is no longer prevented from moving axially with respect to the mounting portion 321 and can be moved out of engagement therewith. In this way, blade 220 is readily removable from engagement with mounting member 321, and thus saw equipped with motor 100. As shown in Figure 5, second blade 240 may have a locking projection 247 that can engage the opening 347 of the blade attachment 340. Petition 870200025251, of 02/21/2020, p. 22/32 19/19
    [0038] It will, of course, be understood that the present disclosure has been described above purely by way of example and that modifications of the details may be made within the scope of the present disclosure. Petition 870200025251, of 02/21/2020, p. 23/32 1/3
    权利要求:
    Claims (14)
    [0001]
    1. Saw (100), comprising: a drive mechanism (110); a first blade (220) configured to oscillate around a first axis perpendicular to a plane defined by a surface of the first blade (220); blade (240) configured to oscillate around a second axis perpendicular to the plane in a direction opposite to that of the first blade (220), and a gear (120, 1430) disposed between the drive mechanism (110) and the first and second blades (220, 240), characterized in that the gear (120, 130) is configured to reduce the speed transmitted from the drive mechanism (110) to the first and second blades (220, 240).
    [0002]
    2. Saw (100) according to claim 1, characterized in that it further comprises an eccentric drive shaft (140) pivotally connected to the drive mechanism (110), wherein the eccentric drive shaft (140 ) acts to cause the first and second blades (220, 240) to wobble.
    [0003]
    3. Saw (100) according to claim 2, characterized in that the eccentric drive shaft (140) is perpendicular to the plane of each of the first and second blades (220, 240).
    [0004]
    4. Saw (100) according to any one of the preceding claims, characterized in that the gear (120, 130) comprises at least one of a planetary gear (120) and a 90° gear transmission (130). Petition 870200025251, of 02/21/2020, p. 24/32 2/3
    [0005]
    5. Saw (100) according to claim 4, characterized in that the gear (120, 130) comprises a 90° gear transmission (130) so that the drive mechanism (110) is parallel to the flat.
    [0006]
    6. Saw (100) according to claims 4 or 5, characterized in that the gear (120, 130) provides a gear ratio of approximately 1:1.5.
    [0007]
    7. Saw (100) according to claim 5, characterized in that the gear (120, 130) comprises a 90° gear transmission (130) which includes a first bevel gear (131) configured to be coupled to a drive mechanism (110), a second bevel gear (133) which is coupled to the eccentric drive shaft (140), the first bevel gear (131) having fewer teeth than the second bevel gear (133).
    [0008]
    8. Saw (100) according to claim 6, characterized in that the 90° gear transmission (130) provides a gear ratio of 1:1.3846.
    [0009]
    9. Saw (100) according to any one of claims 5 to 8, characterized in that the gear (120, 130) further comprises the planetary gear (120) disposed between the drive mechanism (110) and the transmission 90° gears (130).
    [0010]
    10. Saw (100) according to claim 9, characterized in that the planetary gear (120) defines a gear ratio of 1:3.9474 which defines a speed reduction along a direction from the drive mechanism (110) to the first and second blades (220, 240).
    [0011]
    11. Saw (100), according to any one of the preceding claims, characterized by the fact that the first Petition 870200025251, of 02/21/2020, p. 25/32 3/3e second blades (220, 240) oscillate around the same axis.
    [0012]
    12. Saw (100) according to any one of the preceding claims, characterized in that the first and second blades (220, 240) are detachably attached to the saw (100).
    [0013]
    13. Saw (100) according to any one of claims 1 to 12, characterized in that the first and second blades (220, 240) comprise a saw blade (220, 240), comprising: a cutting edge at a distal end (254, 354); a clamping portion at a proximal end (252, 352) of the blade (220, 240), the clamping portion configured to connect the blade (220, 240) to a saw (100 ); and a projection (227) extending from the blade (220, 240) and resiliently biased into a position in which it extends in the opposite direction from a surface of the blade (220, 240).
    [0014]
    14. Saw (100) according to any one of claims 1 to 12, characterized in that it further comprises a connection mechanism comprising: a mounting portion (321) defining a receiving surface (322) and a raised portion (323); and a blade (220, 240) defining an opening (223); wherein a surface of the blade (220, 240) is slidable into engagement with the receiving surface (322) and the raised portion (323) is received in the opening ( 223) of the blade (220, 240) in the plane of the blade (220, 240).
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    KR20180019056A|2018-02-23|Gear mechanism to drive oscillating shaft
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    同族专利:
    公开号 | 公开日
    CN104470447B|2018-04-27|
    KR20150036379A|2015-04-07|
    CA2878822C|2021-07-13|
    BR112015000632A2|2017-06-27|
    EP2872052B1|2018-10-10|
    EP3453340A3|2019-05-22|
    EP2872052A1|2015-05-20|
    EP3453340A2|2019-03-13|
    US9629638B2|2017-04-25|
    IN2014DN10608A|2015-09-11|
    KR102160396B1|2020-10-05|
    CA2878822A1|2014-01-16|
    US20140018811A1|2014-01-16|
    WO2014011577A1|2014-01-16|
    CN104470447A|2015-03-25|
    US20170196570A1|2017-07-13|
    US20210369286A1|2021-12-02|
    US11109871B2|2021-09-07|
    US20180317936A1|2018-11-08|
    JP2015527911A|2015-09-24|
    US10052109B2|2018-08-21|
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    法律状态:
    2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-12-03| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-05-04| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-06-08| 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 09/07/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US201261670914P| true| 2012-07-12|2012-07-12|
    US61/670,914|2012-07-12|
    US201261692869P| true| 2012-08-24|2012-08-24|
    US61/692,869|2012-08-24|
    PCT/US2013/049632|WO2014011577A1|2012-07-12|2013-07-09|A saw, a saw blade and a connection mechanism|
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