• 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:

    公开号:SE536601C2
    申请号:SE1330040
    申请日:2013-04-23
    公开日:2014-03-18
    发明作者:Fredrik Lagerloef
    申请人:Fredrik Lagerloef；
    IPC主号:
    专利说明:

    536 601 the mechanisms with memory metal regulate poorly, the overcooking protection also becomes poor with these mechanisms.
    The above-mentioned problems of the prior art are avoided by the present invention. An apparatus according to the invention has for this purpose an opening mechanism arranged at the lid for controlled operation of an opening portion of the lid cooperating with an opening of the lid when reaching temperatures close to the boiling point in the pan, which opening mechanism comprises a thermostat with a control piston and of the type having a piston actuating, built-in swell body, the volume of which depends on the temperature of the thermostat's environment, the thermostat being arranged to via the control piston, at temperatures approaching the boiling point of the liquid in the pan, usually water, strive to cause the opening mechanism to regulate the opening portion towards an open position, and a spring, which is arranged to, in opposition to the thermostat, strive to move the opening mechanism and the opening portion towards the closed position of the opening at decreasing temperature. The opening is regulated as the cooking process continues, and the regulation takes place with in this context negligible hysteresis.
    In an embodiment of the device according to the invention, the opening mechanism comprises an articulated lever for opening the lid portion. The lever is then arranged to cooperate with the thermostat. A mechanism of this kind is advantageous in that a gear ratio of the movement of the thermostat can be achieved for good control of the opening process.
    In yet another embodiment of the invention, the lever is arranged to cooperate with an operating surface of the opening portion and has a first step portion with two end contact points which alternately cooperate with the operating surface. This gives a gearing in two steps, which is advantageous if you boil liquids where it is necessary to have a quick additional opening in an already open position.
    In another, simpler embodiment of the invention, the thermostat is arranged to work mechanically in direct opposition to the spring with the opening portion slidably mounted between the thermostat and the spring. The invention will be described and explained in the following in connection with a pair of exemplary embodiments, which are shown in the accompanying drawings, in which Fig. 1 schematically shows a perspective view of a saucepan lid with a first example of a device according to the invention, Fig. 2 shows a view of the saucepan lid according to Fig. 1 from one side, Fig. 3 shows a section through the saucepan lid according to Fig. 1 from the same side as in Fig. 2, Fig. 4 shows, in the same section as Fig. 3, how the device lifts an opening portion of the lid with a small gap, Fig. 5 shows, in the same section as Figs. 3 and 4, how the device lifts the opening portion of the lid to a relatively larger opening in Fig. 4, Fig. 6 schematically shows a sectional view of a saucepan lid with a second example of a device according to the invention, seen in a section AA according to Fig. 7, in closed position, Fig. 7 shows the device according to Fig. 6 from above, as if it were on a pan and Fig. 8 shows the device in section as in Fig. 6 but here in the open position.
    As can be seen from Figures 1-5, a first example of a device according to the invention includes a round saucepan lid 1 with a main portion 2, which is intended to abut against the edge of the opening of a pan 1A in the form of a saucepan, (indicated by dashes), and with an opening portion 3, which geometrically forms substantially a circular segment and which covers an opening 4 in the main portion 2 with an edge portion 5. The edge portion 5 extends concentrically outside the outer edge of the opening portion 3 as part of a circular arc segment with the same outer periphery as a part of the main portion 2 and an inner periphery which is concentrically located inside the periphery of the opening portion. The opening 4 in the main portion 2 therefore has approximately the same segmental shape as the segmental opening portion 3 but is slightly smaller than and extends within the entire edge of the opening portion 3. The opening portion 3 is at its segmentally straight side articulated at the main portion 2 via a hinge 6. The hinge 6 consists of an extended jaw 7 arranged along a central portion of the straight edge 8 of the opening 4, which is attached, upright in the figure, to the main portion 2, near the segmentally straight edge 8 of the opening 4, and a lip cooperating with the hook 7. 9, which is attached to the opening part 3. When lifting the opening portion 3, the opening portion 3 rotates angularly around the hinge 6. 536 601 On the upper side of the opening portion 3 (seen in Figs. 1-5) there is an opening mechanism 30 for regulated opening of the opening portion 3. In the opening mechanism 30 includes a lifting hook 10, which has a shape similar to an angle hook, fixed with a spacer portion 11, which extends up substantially perpendicular to the top side n of the opening portion 3. Perpendicular to the spacer portion, the lifting hook 10 includes a lifting portion 12, which extends over the upper side of the opening portion 3, towards the center of the lid 1.
    The lifting hook 10 cooperates with a lever 13, which has an upwardly bent, first step portion 17, which abuts the lifting hook 10 towards the opening portion 3 facing, in the figure below, lifting edge 12A on the lifting portion 12. The lever 13 consists of a bent along its extent in several steps, in this context rigid straps, preferably of metal as well as most of the opening mechanism 30.
    The lever 13 extends between and is held in place by, in the figure from left to right, a coil spring 14, a stirrup 15 and a thermostat 16, which may be of a per se known type and which is described in more detail below. The hinge bar 15 supports from above an intermediate portion of the lever 13 and consists of two side supports 19 and 20 and a guide pin 21 attached between them, which rests against the upper side of the lever 13. The hinge pin 21 forms an axis around which the lever 13 is rotatable under the action of one side the thermostat 16, which when its temperature increases, strives to push the right-hand end of the lever 13 upwards in the figure, and on the other side of the coil spring 14 which strives to push the left-hand end of the lever 13 in the figure upwards, around the hinge pin 21, against the action of the thermostat 16. The thermostat 16 has a mounting flange 16A which rests against the top of the lid 1. The function of the first step portion 17 will be explained later.
    The coil spring 14 is arranged between the main portion 2 of the lid and a slightly obliquely bent first spring support portion 18 for the spring 14 on the lever 13. This is explained in more detail below. Against the pressure of the coil spring 14 the thermostat 16 acts via a piston 22 included in the thermostat, which piston abuts, in the figures below, against the lever 13, and with the spring acts, to some extent, in the position of use, the weight of the opening portion 3 via abutment of the first step 17 of the lever 13 against the lifting hook 10. In order to be held in place well, the lever 13 is provided with an upwardly bent second step portion 23 between the pivot pin 21 and 536 601 the spring-supporting, obliquely supported support portion 18 and a piece from the second step portion 23, at the lever 13 attaches the locking pin 24.
    Fig. 2 shows that the helical spring 14 is clamped between the outer, first spring support portion 18 of the lever 13 and a second spring support 25 of the main portion 2 of the lid 1 so that the spring 14 is kept in a well-defined position when it springs in its working area, i.e. compressed or expanded. Figure 2 also shows on the underside of the lid 1 a sensor body 26 of the thermostat 16, which sensor body 26 is intended to sense the steam temperature inside the saucepan 1A (shown diagrammatically in Fig. 1 with dashes) on which the lid is intended to rest.
    Fig. 3 shows the exemplary invention in a section, from the same direction as in Fig. 2, showing how the lever 13 is held in position with the hinge pin 21 located between the second step portion 23 and the locking pin 24. The spring 14 and the thermostat 16 are mounted so that the two, in combination with the hinge bar 15, closely hold the lever 13 in a position where it is substantially parallel to the top of the lid 1, when room temperature or at least temperatures significantly below the boiling point of water prevail in the thermostat 16. The opening 4 in the lid 1 is then closed by the opening portion 2. The spring 14 is tensioned, but in its least compressed position, and the piston 22 of the thermostat 16 is in the neutral position, i.e. the thermostat 16 is not expanded.
    Fig. 4 shows how the opening mechanism 30 caused the opening portion 3 to lift from the main portion 2 to release excess energy, steam, through the opening 4 (not visible in this ur gur). This opening process takes place in the following way.
    The sensor body 26 has sensed that the temperature in the pan is approaching the boiling point (approximately 100 ° Celsius for water at normal air pressure). A wax body (not shown) inside the sensor body has then begun to swell and therefore pushes up the piston 22, which in turn lifts the part of the lever 13 against which it rests upwards correspondingly therewith. The first step portion 17, which is formed with two end contact points, a toe portion 27 and a heel portion 28 (one can imagine the first step portion 17 as the profile of an upside down foot) thereby contacts the lower edge 12A of the lifting hook 10 and lifts it and the the opening portion 3 is attached to the lifting hook 10. The opening portion 3 is conductively connected to the hinge 6, and therefore, according to the laws of mechanics, the opening portion 3 rotates around the hinge 6 and lifts from the edge portion 5.
    A free passage is thus formed under the opening portion 3, through the opening 4 (not shown in Fig. 536 601 4) between the interior 29 of the pan and the surrounding space, and energy in the form of steam in the pan is released so that the temperature in the pan drops, the temperature goes down and overcooking is counteracted. The spring 14 is angled and compressed in this process a bit by the action of the lever 13. Since the spring 14 is mounted at an angle to the cover 1, facing the oblique outer support portion 18 on the second stage 23 of the lever, the spring is compressed with a smaller compression stroke in relation to the movement of the thermostat at the beginning of its expansion, which is advantageous. If the opening now provided is sufficient, and temperature changes in the pan actuate the thermostat 16 so that its wax body stops swelling and the piston 22 is not pushed out any more, the opening mechanism 30 remains approximately in the reached position. Some oscillation in the back and forth position may occur, as this is a regulatory process.
    If the opening made according to the sequence of events described above is not enough, the excessive temperature in the pan remains, and thus the threat of overcooking, the following progress takes place, as shown in Fig. 5. Thus, if the temperature increase remains or does not decrease sufficiently by the opening achieved, the wax body in the thermostat 16 swells further and the force then becomes sufficient for the thermostat piston 22 to be able to further compress the spring 14 via the lever 13, i.e. via the lever 13 lift the opening portion 3 further. The piston 22 of the thermostat 16 is then expressed a further distance from the thermostat 13, compared with Fig. 4, and has lifted the lever 13 so that the opening portion 3 has swung a further distance around the hinge 6 and increased its upward angle towards the main portion 2 of the lid 1, in its mode of use. Because the distance between the hinge 6 and the point of contact between the lever 13 at the toe portion 27 of the lever (see Fig. 4) and the lower edge 12A of the lifting hook 10 is less than the distance between the turning point of the lever 13 around the pivot 21 and the toe portion 27, the contact point between the lifting hook 10 and the lever 13 to move from the toe portion 27 to the heel portion 28 of the lever (see Fig. 5). This has the effect that the control effect on the lifting of the opening portion 3 from the lever 13 becomes more sensitive, since the effective lever of the lifting hook 10 of the opening portion 2 relative to the hinge 6 becomes shorter. i.e. for each degree the lever 13 is now lifted, the opening portion 3 is raised higher than when the lever contact with the lifting hook is at the toe portion 27. Thus, this means that the gear ratio of the opening mechanism 30 is changed and the control is optimized. 536 601 In order to obtain a controlled course as far as possible when opening the lid 1, the coil spring 14 of the opening mechanism 30 is as previously mentioned arranged at an angle to the lid 1 and standing obliquely, towards the obliquely bent, or towards the main extent of the lever 13, angled, the support portion 18 on the lever 13. In this case, a gear ratio is achieved when the lever 13 is rotated, under the influence of an expanding thermostat 16, i.e. the compression of the helical spring 14 becomes smaller than if it were directly below the end portion 18 of the lever, perpendicular to the main plane of the lid 2 and thus entails less work for the thermostat 16. This enables the spring constant to be larger than otherwise, giving a safe return of the thermostat 16 and thus closing the opening portion 3 in the last position, when the temperature in the vessel has dropped. This contributes to a temperature-fine lifting and opening holding of the opening portion 3, i.e. a well-regulated opening function of the lid 1 is obtained. The main function of the spring, to push in the piston 22, ie. compress, or reset the thermostat 16, when the wax body with decreasing temperature shrinks, is thus obtained by selecting the constants of the coil spring in relation to the geometric conditions selected for the parts of the opening mechanism 30 and the properties of the thermostat together with the described geometry.
    Figures 6-8 show a second example of a device according to the invention, in this case with an opening mechanism 130 of a somewhat simpler type than the example described above. Thus, with reference to Figures 6-8, the device of the second example includes a lid 101.
    The opening mechanism 130 includes a base in the form of a flat ring 102, intended to abut against the edge of a pan 101A, which is to be protected against overcooking. Integrated inside the ring, preferably in the same plane, there is a cruciform center portion 103 (see Fig. 7). The center portion 103 carries in its center a thermostat 104 of substantially the same type as the thermostat in the first example, i.e. it has a piston, 105, which protrudes when the temperature in the thermostat rises significantly. Close up, on top of the piston 105 of the thermostat 104, rests a conical upper lid 106, which, when the thermostat is not actuated, also lies close to the ring 102. The conical upper cover 106 is rotationally symmetrical about its lid tip 107. In other words, the lid tip 107, or rather the pit inside the tip 107, rests in the position of use of the lid on top of the thermostat piston 105 at the same time as the lid lid edge 108 also has circumferential contact with the ring 102. To obtain a more secure contact, the lid lid edge is provided with a flattening bevel 109. The lid 106 has two diametrically located holes. 110. Two pins 111A and 111B extend through the 536 601 holes 110. The pins 111A and 111B are attached to each of two opposite spokes 103A and 103B in the center portion 103 near its center but outside the part carrying the thermostat 104. At the pins 111A and 111B a round knob 112 is attached, from the center portion 103 seen outside or rather, above the top cover 106. Finally, a coil spring 113 is clamped between the knob 112 and the top cover 106, on top of the cover tip and in opposition to the thermostat 104.
    Figure 8 shows how the thermostat 104 reacted to a temperature close to the boiling point in the pan 101A and thereby pressed out the piston 105. The piston 105 then lifted the top cover 106, and at the same time compressed the coil spring 113. The spring 113 is suitably so formed at its end facing the top cover 106 that the top cover is balanced so that a slit-like, substantially annular opening 102A is formed around the same, above the ring 102. In this position, excess energy in the form of steam can be released between the cover 101 and the ring 102.
    When sufficient excess energy has been released, the temperature and thus the power of the thermostat 104 decreases. The coil spring 113 is dimensioned so that it can then press down the top cover 106 and thus the piston 105 back into the thermostat 104, so that the emission of energy is regulated. In this context, a largely hysteresis-free regulatory process arises.
    The present invention is defined by the appended claims and is not limited to what is described in connection with the exemplary embodiment shown in the drawings.
    For example, the hinge in example one may consist of a so-called ordinary hinge, and the lid may have a different shape; for example, it may be embossed so that it is not flat. The method of attaching the details of the opening mechanism to the parts of the lid may be welding, gluing or another method known to those skilled in the art. The spring can be of a different type than a coil spring, e.g. a resilient jumper. The thermostat can be of a type that is common in the cooling system of internal combustion engines in motor vehicles. The actuator effect is achieved in these by a medium, usually of wax, undergoing a phase change from solid to liquid, from liquid to gas or from solid to gaseous form when the temperature rises. The phase change leads to a volume expansion which in turn is used to exert a force on, for example, a piston, which is displaced in a cylinder. When the temperature drops, the process is reversed and in most types of this type of thermostat an external force is needed to return the piston to "neutral | ownership", in the example shown in the form of the said spring. The control process 536 601, which is important for the invention, thus takes place in the interaction between the force of the spring on the one hand and the temperature-dependent force of the thermostat on the other hand, just as in the first example.
    The receptacles 110 in example 2 are of course dimensioned with a clearance towards the pins 111A and 111B, but with such a small gap that the steam emission through the receptacles in the context can be neglected. The size of the lid 106, ie. its diameter, can of course be varied and thereby adapted correspondingly to the diameter of the ring 102.
    权利要求:
    Claims (4)
    [1]
    Device for avoiding overcooking of a combination of cookware (1A, 101A) with lid (1, 101) during cooking, characterized by an opening mechanism (30, 130) arranged at the lid (1, 101) for controlled operation of a with an opening (4, 102A) of the lid (1, 101) cooperating opening portion (3, 106) of the lid (1, 101) upon reaching temperatures near the boiling point of the pan, which opening mechanism (30, 130) comprises a thermostat (16 , 104) with a control piston (22, 105) and of the type having a piston (22, 105) acting on the built-in swelling body, the volume of which depends on the temperature of the thermostat's environment, the thermostat being arranged to ), at temperatures approaching the boiling point, strive to cause the opening mechanism (30, 130) to control the opening portion (3, 106) towards an open position, and a spring (14, 113), which is arranged to counteract the thermostat ( 16, 104) strive to move the opening mechanism (30, 130) and the opening portion (3, 106) against the closed position of the opening (4, 102A) at decreasing temperature.
    [2]
    Device according to claim 1, characterized in that the opening mechanism (30) comprises a lead-mounted lever (13) for opening the opening portion (3) and that the lever (13) is arranged to cooperate with the thermostat (16) and the spring. (14) for regulated opening of the opening portion (3).
    [3]
    Device according to claim 2, characterized in that the lever is arranged to cooperate with a lifting hook (10) of the opening portion (3) and has a first step portion (17) with two end contact points (27, 28) which are arranged to alternately at different opening degrees of the opening mechanism (30) cooperate with the lifting hook (10).
    [4]
    Device according to claim 1, characterized in that the thermostat (104) operates mechanically in direct opposition to the spring (113) with the opening portion (106) slidably mounted between the thermostat (104) and the spring (113). 10
    类似技术:
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    同族专利:
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    WO2014175813A1|2014-10-30|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB154604A|1919-12-03|1922-02-28|Svenska Aktiebolaget Gas Accum|Cooking apparatus for use with gas, liquid fuel or electricity|
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    US4617452A|1983-12-13|1986-10-14|Kabushiki Kaisha Toshiba|Rice cooker|
    US5004617A|1988-05-23|1991-04-02|Raytheon Company|Method of heating food|
    DE4233913C2|1992-10-08|2003-04-30|Behr Thermot Tronik Gmbh|Electrically heated thermostatic valve for a coolant circuit of an internal combustion engine|
    DE4330215A1|1993-09-07|1995-03-09|Behr Thomson Dehnstoffregler|Cooling system for an internal combustion engine of a motor vehicle with a valve|
    WO2005117528A2|2004-06-01|2005-12-15|Son, Tae-Soon|Container lid for preventing overbrimming|
    US20080257166A1|2007-04-21|2008-10-23|Zheng Peng|Modular cooking apparatus|
    CA2617149A1|2008-01-08|2009-07-08|Joseph Fishman|Electromechanical failsafe thermostat|
    US8191468B2|2009-04-08|2012-06-05|Javad Malek Azary|Smart anti burn cooking pot|
    WO2014058437A1|2012-10-12|2014-04-17|Empire Technology Development Llc|Containers with shape-changing materials|
    US10258195B2|2013-03-29|2019-04-16|Jim Blomberg|Barbeque grill and oven|EP2923619B1|2014-03-25|2016-07-20|BALLARINI PAOLO & FIGLI S.p.A.|Lid of containers for cooking food|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1330040A|SE1330040A1|2013-04-23|2013-04-23|Overheating Protection|SE1330040A| SE1330040A1|2013-04-23|2013-04-23|Overheating Protection|
    PCT/SE2014/050486| WO2014175813A1|2013-04-23|2014-04-23|Protection against overcooking|
    US14/785,859| US20160088971A1|2013-04-23|2014-04-23|Protection against overcooking|
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