Patent Application
20150230649
This application relates generally to commercial cooking devices such as kettles and, more specifically, to a cooking device including a tilt arrangement.
In commercial kitchens (e.g., found in restaurant, cafeteria and retail environments) cooking kettles are often utilized to cook relatively large volumes of food product, such as soups. It is known to provide such kettles with a tilt arrangement that allows the kettle to be tilted downward in order to empty the kettle of its contents.
To supply a tilting function for a cooking kettle, a gear reducer may be employed. Limitations in the quality of gearmesh, inherent to such gear reducer assemblies, can introduce an uneven “chattering” in the tilting motion of the kettle, particularly when the gear reducer is required to deliver higher levels of torque.
It would be desirable to provide a cooking kettle, or other cooking device, with a tilting arrangement in which chatter is alleviated and/or the gear reducer that is used can be less expensive while still providing suitable performance.
In one aspect, a cooking assembly includes a frame and a cooking receptacle, the cooking receptacle having a opening for placement of product into a cooking space of the cooking receptacle. The cooking receptacle is pivotally mounted to the frame for rotation about a pivot axis between an upright position and a tilted position. A damper arrangement is operatively connected to dampen rotary motion of the cooking receptacle.
In one implementation, the damper arrangement includes a torque arm operatively connected for rotation with the cooking receptacle and at least one damper having a first end mounted to the frame and a second end mounted to the torque arm at a location spaced from the pivot axis.
In one implementation the damper is of a linear type that is extendable and retractable as the cooking receptacle is rotated back and forth between the upright position and the tilted position.
In one implementation, the first end of the damper is pivotally mounted to a fixed location on the frame and the second end of the damper is pivotally mounted to the torque arm.
In one implementation, the damper arrangement includes a multi-function linear damper that includes dampen on extension, dampen on compression and extension force.
In one implementation, a gear reducer is operatively connected between a tilt actuator and the cooking receptacle.
In one implementation, the cooking receptacle is a kettle body, the actuator is a manual handle that is operatively connected to the gear reducer, and the gear reducer is operatively connected to rotate a shaft that is aligned with the pivot axis and operatively connected to the kettle body. The damper arrangement includes a torque arm operatively connected to the shaft for rotation with the shaft and the kettle body and at least one damper having a first end mounted to the frame and a second end mounted to the torque arm at a location spaced from the pivot axis.
In another implementation, the cooking receptacle is a kettle body, the actuator is a powered device that is operatively connected to the gear reducer, and the gear reducer is operatively connected to rotate a shaft that is aligned with the pivot axis and operatively connected to the kettle body. The damper arrangement includes a torque arm operatively connected to the shaft for rotation with the shaft and the kettle body and at least one damper having a first end mounted to the frame and a second end mounted to the torque arm at a location spaced from the pivot axis.
In another aspect, a cooking kettle assembly includes a frame and a kettle body. The kettle body has a top opening for placement of product into a cooking volume of the kettle body. The kettle body is pivotally mounted to the frame for rotation about a pivot axis between an upright position and a tilted position. An actuator is operatively connected for effecting pivot of the kettle body between the upright position and the tilted position. A torque arm is operatively connected so as to rotate with the kettle body about the pivot axis simultaneous with the kettle body. A damper has a first end pivotally mounted at a fixed location on the frame, and a second end pivotally mounted to the torque arm at a location spaced from the pivot axis. The damper is extendable and retractable as the kettle body is rotated back and forth between the upright position and the tilted position.
In one implementation, the damper is a multi-function damper that includes dampen on extension, dampen on compression and extension force.
In one implementation, a gear reducer is operatively connected between the actuator and the kettle body.
In one implementation, the actuator is a manual handle that is operatively connected to the gear reducer, and the gear reducer is operatively connected to rotate a shaft that is aligned with the pivot axis and operatively connected to the kettle body.
In one implementation, the torque arm is operatively connected to the shaft.
In one implementation, a first end of the shaft is operatively connected to the kettle body, the torque arm is operatively connected to a second end of the shaft and the gear reducer engages the shaft between the first end and the second end.
In one implementation, the actuator is a powered device that is operatively to the gear reducer, and the gear reducer is operatively connected to rotate a shaft that is aligned with the pivot axis and operatively connected to the kettle body.
In one implementation, the damper is a first damper member, the fixed location is a first location and the cooking kettle assembly further comprises a second damper having a first end pivotally mounted at a second fixed location on the frame, and a second end pivotally mounted to the torque arm at a location spaced from the pivot axis, where the second damper is extendable and retractable as the kettle body is rotated back and forth between the upright position and the tilted position.
In one implementation, the cooking kettle assembly further includes a third damper having a first end pivotally mounted at a third fixed location on the frame, and a second end pivotally mounted to the torque arm at a location spaced from the pivot axis, and the third damper is extendable and retractable as the kettle body is rotated back and forth between the upright position and the tilted position, wherein the first damper is configured to dampen on extension, the second damper is configured to dampen on compression and the third damper is configured to provide extension force.
In one implementation, the cooking volume of the kettle body is at least 20 gallons.
In one implementation, a heating system is provided to heat contents with the kettle body.
In one implementation, the damper extends as the kettle body rotates from the upright position to the tilted position, and the damper compresses as the kettle body rotates from the tilted position to the upright position.
Referring to
A tilt actuator 30 is operatively connected for effecting pivot/rotation of the kettle body between the upright position and the tilted position. In the illustrated embodiment the actuator takes the form of a manually rotatable handle. However, it is recognized that powered actuators could also be used. The actuator 30 is operatively connected to a gear reducer 32, which is in turn operatively connected to rotate a shaft 34. The shaft 34 is aligned with the pivot axis and operatively connected to the kettle body 14 so that rotation of the shaft 34 effects rotation of the kettle body 14. A torque arm 36 is operatively connected so as to rotate with the kettle body 14 about the pivot axis 16 simultaneous with the kettle body. In the illustrated embodiment, one end of the shaft 34 is operatively connected to the kettle body 12, and the torque arm 36 is operatively connected toward the other end of the shaft 34, with the gear reducer engaging the shaft at a location between the two shaft ends. However, in other embodiments the torque arm could be provided at other locations in the assembly.
A linear damper 38 (e.g., hydraulic or pneumatic type) has one end pivotally mounted at a fixed location 40 on the frame, and an opposite end pivotally mounted to the torque arm at a location 42 spaced from the pivot axis 16. Due to the rotational movement of the torque arm, the damper 38 extends and retracts as the kettle body is rotated back and forth between the upright position and the tilted position. In the illustrated embodiment of
The damper arrangement alleviates the chatter issue mentioned above. The linear damper 38 in combination with the torque/lever arm 36 reduces the torque (internal to the gear reducer 32) and dampens uneven rotary motion of the kettle body. In one example, it was found that the maximum torque contribution from the gear reducer to effect full rotation to the tilted position was reduced from approximately 160 ft-lb to approximately 80 ft-lb by use of a suitable damper, resulting in easier operation of the gear reducer hand crank 30 and a reduction the amount of shake in the kettle tilt motion. Thus, it may be desirable for the damper arrangement to be configured reduce the required torque contribution from the gear reducer by at least 25% (e.g., at least 35% or even at least 40%, such as 50% or more).
Referring now to
It is to be clearly understood that the above description is intended by way of illustration and example only, is not intended to be taken by way of limitation, and that other changes and modifications are possible. For example, while tiltable cooking kettles are primarily described above, it is recognized that the tilt arrangement with damper could be used in conjunction with any of tiltable kettles, tiltable brazing pans (e.g., rectangular or round) or any other tiltable cooking receptacle.
