Pot support with elastic foot and method for fixing elastic foot to a pot support

Abstract

The invention presents a solution to avoid glue when fixing an elastic foot to a pot support, such as used in ranges and kitchen hobs. The pot support (1000) has a cavity (2200) which is aligned with an elastic foot (1300) which comprises on the other hand a hollow space (3240). By inserting an expansion body (3220, 3450) into the hollow space, a press fit is generated between a support structure (1800) of the pot support and/or elastic material of the foot (1300). Rivets (3450) or bolts (3220) are taught as expansion bodies. The invention also teaches a method to mount an elastic foot to a pot support. The invention provides a solution for avoiding the deteriorating effects of aging glue used in the prior art, which leads to the loss of rubber feet on current pot supports.

Claims

1. A cooking appliance comprising: a gas burner disposed at a cooktop surface; and a pot support positioned above the gas burner and supported by the cooktop surface, wherein the pot support comprises: a support structure; a contact surface; a cavity within the support structure accessible through the contact surface; a foot made from elastic material comprising a hollow space extending into the cavity, the foot being adapted to contact the cooktop surface to support the pot support thereon; and an expansion body within the cavity and the hollow space, wherein the expansion body is larger than the hollow space, thus establishing at least a press fit of the elastic material.

2. The cooking appliance according to claim 1, wherein the cavity is a stud hole or a bore having a first diameter, the foot having a second diameter.

3. The cooking appliance according to claim 2, wherein the second diameter is larger than the first diameter.

4. The cooking appliance according to claim 1, wherein the expansion body is a bolt.

5. The cooking appliance according to claim 1, wherein the expansion body is fixed within the cavity.

6. The cooking appliance according to claim 1, wherein the expansion body is a rivet.

7. The cooking appliance according to claim 1, wherein the elastic material is rubber.

8. A cooking appliance comprising: a gas burner disposed at a cooktop surface; and a pot support positioned above the gas burner and supported by the cooktop surface, wherein the pot support comprises: a support structure; a contact surface; a cavity within the support structure accessible through the contact surface; a foot made from elastic material comprising a hollow space, wherein the foot does not extend into the cavity, and wherein the foot is adapted to contact the cooktop surface to support the pot support thereon; and an expansion body within the cavity and the hollow space, wherein the expansion body is a rivet.

9. The cooking appliance according to claim 8, wherein the rivet directly contacts a wall of the cavity.

10. A method for mounting a foot comprising elastic material to a pot support of a cooking appliance, wherein the cooking appliance comprises a gas burner disposed at a cooktop surface and the pot support is positioned above the gas burner and is supported by the cooktop surface, wherein: in a first step, a hollow space of the foot and a cavity of the pot support are aligned; and in a second step, an expansion body is inserted into the hollow space to form a press fit with the foot, wherein the expansion body is larger than the hollow space, thus establishing at least a press fit of the elastic material, the foot being adapted to contact the cooktop surface to support the pot support thereon.

11. The method according to claim 10, wherein the elastic material is pressed against a sidewall of the cavity.

12. The method according to claim 11, wherein the expansion body is a rivet that is fixed after the cavity and hollow space have been aligned.

13. The method according to claim 10, wherein the elastic material is expanded by a bolt fixed inside the cavity, when the foot is inserted into the cavity.

14. The method according to claim 10, wherein the foot is pressed against a contact surface by the expansion body.

15. The method according to claim 10, wherein in the first step, the hollow space of the foot and the cavity of the pot support are aligned such that the hollow space of the foot is positioned within the cavity.

Description

(1) Subsequently, the invention will be further explained on the basis of examples shown in drawings, wherein:

(2) FIG. 1 shows a pot support;

(3) FIG. 2 shows another view of a pot support; and

(4) FIG. 3 shows a number of examples of feet secured to a pot support.

(5) As FIG. 1 shows in a preferred embodiment, a pot support 1000 may have four extensions that with a contact surface rest on a range, a hob or a flush-mounted hob in order to securely position a pot above a gas flame, for instance. Within a support structure, elastic feet 1100, 1200, 1300 and 1400 are maintained. Also shown is an access 1500, 1600 that shows where another example 1050 is cut. In a cut enlarged detail view 1700, an elastic foot 1300 is shown, which may be of any elastic material and especially made of rubber because rubber is highly time-stable and undergoes no particular rapid aging. In this case, the rubber foot has a cylindrical portion which has a diameter 1770. The cylindrical portion is inserted into a stud hole 1750. Also shown is a sidewall of the support structure 1800.

(6) FIG. 2 shows a further detail of a pot support according to an embodiment of the present invention. In particular, the inventors have realized that secure connections between elastic feet and a support structure can be established without the use of glue. Here, a bottom contact surface of the support structure 1800 is shown which is identified by reference sign 2000. Within the support structure, a cavity, in this case a bore or a stud hole is provided 2200, which has a first diameter 2100. Also a bolt 2300 can be seen which is e.g. built into the stud hole respectively cavity 2200 and may enter a hollow space within an elastic foot to expand it once it is inserted into the stud hole 2200. In an enlarged view 1700, the elastic foot 1300 is shown, and its cylindrical portion has a distance 1850 to a top and of a stud hole. It is to be noted that the cavity where the elastic foot is inserted or supported does not have to be of a regular shape. On the other hand, it is easier to calculate a friction force between an elastic foot and a sidewall of the cavity built within a support structure in a predetermined manner in order to establish constant manufacturing conditions by providing feet and bores of a certain measurement relationship.

(7) As FIG. 3 shows various examples of mounting an elastic foot to a support structure for forming a pot support are possible. The examples belonging to each other show various stages of the mounting process and those depicted above each other belong together to the same embodiment. In the example 3100, a support structure 3110 is shown and an elastic foot 3120 is inserted into the support structure 3110. The elastic foot has a circular pad-shaped portion 3122 and a cylindrical barrel-shaped portion 3127 which is inserted e.g. into a cavity respectively bore or stud hole of the support structure 3110. In case of the prior art example shown here, glue 3130 is used to fix the foot 3120 in the support structure 3110.

(8) In another example 3200, a development according to an embodiment of the present invention is shown. Here, in the support structure 3110, a bolt 3220 is shown. This bolt 3220 may e.g. be a nail. On the other hand, this bolt may be formed during the iron casting of the support structure 110 together with it.

(9) Further below, a foot 3230 is shown. It is inserted into a cavity 3225 and also features a hollow space 3240 that is here provided in a central symmetry axis and along with it. On the upper part, it can be seen that the bolt 3220 enters the hollow space 3240 of the foot and applies a pressure force to the elastic material in an area 3250. In this manner, the friction force between the elastic material in the area 3250 and applied to a sidewall of the cavity 3250 can be controlled by the dimensions of the bolt 3220 and dimensioned in such a manner that the foot 3230 will be reliably maintained by way of a press fit within the support structure 3110, no matter under which thermal conditions the pot support is operated and which thermal stress is created between the foot and the support structure.

(10) At 3300, a similar example of an embodiment of the pot support according to the present invention is shown. Here, the bolt is not fixed to the support structure 3110. The elastic foot 3330 is inserted into a cavity into the support structure 3110 as shown and later a bolt 3320 is inserted into a central hollow space 3340 provided along a symmetry axis within the elastic foot 3330. In this manner, using the bolt 3320 as an expansion body, the elastic material will be pressed against the sidewall 3360 of the cavity in an area 3350 in order to securely fix the elastic foot to the support structure of the pot support. The insertion of bolt 3320 may be executed by means of a nail gun or a semi-automatic device or tool which increases the lead time in production lines over hand made processes.

(11) In another example of the pot support according to a further development of an embodiment of the present invention 3400, an elastic foot in a similar manner as in the previous examples 3430 having a hollow space 3440 is inserted into a support structure 3110. In this case, however, a rivet consisting of a central part 3450 and an outer hollow cylindrical part 3455 is inserted into the hollow space 3440. As further shown, the cylindrical part 2455 is expanded in a manner that it presses the elastic material of the foot 3430 against the support structure 3110.

(12) By dimensioning the rivet according to the desired pressure after fixing it, the friction force between the support structure and the elastic foot 3430 can be exactly dimensioned in a manner that it is sufficient to maintain the elastic foot in position when the pot support is exposed to a usual temperature range in question for a kitchen hob or a range.

(13) In a further development of an embodiment according to the present invention, the elastic foot shown in the example 3500 consists of a pad-shaped portion 3530 having a hollow space 3540 that is not inserted in the cavity or bore 3525. In this case, also a rivet consisting of an interior part 3550 and a hollow cylindrical part 3555 is inserted through the hollow space 3540 and then expanded. Here, as shown further below, the rivet is attached to a sidewall 3560 with its exterior part 3555. On the other hand, the hollow cylindrical part securely presses the pad-shaped portion of the elastic foot 3530 against a bottom surface of the support structure 3110. Thus, as shown above, various possibilities exist to fix and mount an elastic foot to a support structure of a pot support, respectively pan support.

LIST OF REFERENCE NUMERALS

(14) 1000 pot support; 1100, 1200, 1300, 1400 elastic feet; 1500, 1600 cut axis 1050 cut support structure; 1700 detailed enlarged view; 1800 support structure; 1770 diameter of cylindrical part of elastic foot 1750 cavity; 2000 bottom contact surface of support structure; 2100 diameter of cavity; 2200 cavity; 2300 expansion body; 1850 distance between top end of foot and top end of stud hole; 3100 prior art; 3110 support structure; 3120 elastic foot; 3122 pad-shaped portion of elastic foot; 3140 glue; 3130 glue; 3127 cylindrical portion of elastic foot; 3200 other development; 3220 bolt; 3225 sidewall of hole/bore; 3250 press-fit area; 3240 hollow space; 3230 pad-shaped portion of elastic foot; 3300 further example; 3330 elastic foot; 3320 bolt; 3340 hollow space; 3400 other example; 3440 hollow space; 3430 pad-shaped portion of elastic foot; 3455 cylindrical portion of rivet; 3450 bolt portion of rivet; 3500 other example; 3525 bore: 3535 pad-shaped portion of elastic foot; 3540 hollow space; 3555 hollow cylindrical portion of rivet; 3550 bolt portion of rivet; 3560 sidewall of bore in support structure 3110.