Arrangement of a hot plate in a cook top

• US 6,050,176 A
• Filed: 10/22/1998
• Issued: 04/18/2000
• Est. Priority Date: 10/23/1997
• Status: Expired due to Fees

• Current Assignee: SCHOTT Glass
• Original Assignee: SCHOTT Glass
• Inventors: Taplan, Martin, Schultheis, Bernd
• Primary Examiner(s): SIMONE, TIMOTHY F
• Application Number:
  US09/176,981
• Time in Patent Office: 544 Days
• Field of Search: 99/326-333, 99/339, 99/422, 99/340, 99/349, 99/389, 99/451, 99/378, 99/447, 99/449, 99/400, 99/401, 126/214 A, 126/39 A, 126/39 B, 126/39 N, 126/39 R, 126/214 C, 126/214 D, 126/211, 126/39 K, 126/221, 126/42, 126/494, 126/497, 219/445.1, 219/506, 219/452.12, 219/451.1, 219/448.1, 219/458.17, 219/448.11, 219/462.1, 219/400, 392/418, 392/422
• US Class Current: 99/339
• CPC Class Codes: F24C 15/102 electrically heated
• CPC Class Codes: H05B 3/74 Non-metallic plates , e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits

Abstract

Arrangement of an electrical heating element as a cooking zone, having as a carrier a ceramic of very high thermal conductivity, in a cutout of a surface consisting of glass-ceramic, glass, ceramic, metal or plastic. The ceramic carrier of the heating element can rest with overlap on regions of the surface which deviate from the main plane of the plate-like surface so as form elevations running linearly, such as cone frustums, spherical segments and/or cones, and which define the edge of the cutout. This elevated rest of the heating element serving as a bearing, and the underside of the surface serving as an abutment for a cover arranged below the main plane of the surface and closing off the cutout downwards, and the heating element being fixed positively and non-positively in the cutout of the surface by way of fastening elements connected firmly to the heating element and firmly and releasably to the cover.

Claims

1. A device for cooking food, said device comprising:

a cook top, said cook top defining a plane;

said cook top comprising a cutout portion;

a hot plate comprising a carrier and an electrical heating element;

said hot plate being disposed at said cutout portion of said cook top;

said cook top comprising a first portion, said first portion being disposed about and adjacent said cutout portion of said cook top;

said first portion of said cook top being configured to be disposed to project upwardly a substantial distance from said plane of said cook top;

said hot plate being disposed adjacent to and being disposed above said upwardly projecting portion of said cook top;

said hot plate and said upwardly projecting portion being configured to permit movement of said hot plate due to thermal expansion of said hot plate relative to said projecting portion and to permit movement substantially parallel to and above said plane of said cook top; and

said upwardly projecting portion being configured and disposed to support said hot plate.

2. The device according to claim 1 wherein:

a part of said cook top adjacent said upwardly projecting portion and said upwardly projecting portion together comprise a structure about said cutout portion;

said part is disposed outward of said upwardly projecting portion;

said structure comprises a one-piece continuous substantially uniform structure made from substantially the same material therealong; and

said part extends a substantial distance outward from said upwardly projecting portion.

3. The device according to claim 2 wherein:

said projecting portion extends out of the plane of said cook top;

said projecting portion is configured and disposed to form an elevated portion;

said elevated portion is configured and disposed to form a bearing for said heating arrangement; and

said elevated portion comprises one of (a) (b) and (c);

(a) a cone frustrum;

(b) a spherical segment; and

(c) a cone.

4. The device according to claim 3 comprising:

said cook top comprising first and second sides, said first side being configured to be disposed above said second side;

said hot plate being disposed adjacent said first side of said cook top;

a cover to cover a region below said cutout of said cook top;

said cover being disposed adjacent said second side of said cook top and adjacent said cutout portion of said cook top;

said cover being disposed to abut said second side of said cook top;

said cover being disposed to form a substantially enclosed region with said cook top and said hot plate, adjacent said cutout portion of said cook top;

a connecting element to hold said heating arrangement adjacent said cutout portion of said cook top;

said connecting element being securely connected to said hot plate; and

said connecting element being releasably connected to said cover.

5. The device according to claim 4 wherein:

said carrier comprises a ceramic of high thermal conductivity;

said cook top comprises at least one of (d), (e), (f), and (g);

(d) glass-ceramic;

(e) glass;

(f) ceramic; and

(g) metal;

said elevated portion comprises a surface, said surface of said elevated portion being disposed substantially parallel to said plane of said cook top;

said projecting portion defines the outside of said cutout portion of said cook top;

said carrier comprises an outer portion;

said outer portion of said carrier is disposed to overlap said projecting portion of said cook top; and

said hot plate is connected in said cutout.

6. The device according to claim 5 wherein said elevated portion comprises one of (h), (i), and (j):

(h) a circular portion;

(i) an oval portion; and

(j) an elliptical portion.

7. The device according to claim 6 wherein said elevated portion comprises at least one of:

a circular cone frustrum, and a circular cone.

8. The device according to claim 7 wherein said cover is one of (k) and (l):

(k) formed from said cook top by shaping; and

(l) a separate piece from said cook top, said separate piece comprising at least one of;

metal, and plastic.

9. The device according to claim 8 wherein:

said cover comprises at least one orifice;

said at least one orifice is disposed and configured to permit said connecting element to be firmly and releasably connected to said cover;

said connecting element comprises one of (m) and (n);

(m) at least one snap hook;

each of said at least one snap hook comprising a nose portion; and

said nose portion of each of said at least one snap hook being configured and disposed to connect said connecting element to said cover through a corresponding one of said at least one orifice; and

(n) at least one threaded bolt;

said at least one thread bolt being disposed through a corresponding one of said at least one orifice; and

at least one threaded nut, said at least one threaded nut being disposed on a corresponding one of said at least one threaded bolt to secure said cover to said connecting element.

10. The device according to claim 9 comprising:

said fastening element being hard-soldered to said hot plate;

a gasket;

said elevated portion comprising a contact portion to contact said hot plate;

said gasket being disposed at least one of;

between said contact portion and said hot plate to contact said hot plate and said contact portion, and between said cover and said cook top to contact said cover and said cook top;

said gasket comprises at least one of;

a graphite containing material and a ceramic fiber material;

an insulating material;

said insulating material being disposed in said substantially enclosed region;

said insulating material being at least one of;

heat insulating; and

electrically insulating;

heating conductors disposed in said substantially enclosed region;

electrical leads disposed in said substantially enclosed region;

cable strain relief devices disposed in said substantially enclosed region; and

cable leadthroughs disposed in said substantially enclosed region.

11. A device for cooking food, said device comprising:

a cook top, said cook top defining a plane;

said cook top comprising a cutout portion;

a hot plate comprising a carrier and an electrical heating element;

said hot plate being disposed at said cutout portion of said cook top;

said cook top comprising a first portion, said first portion being disposed about and adjacent said cutout portion of said cook top;

said first portion of said cook top being configured to be disposed to project upwardly a substantial distance from said plane of said cook top;

a part of said cook top adjacent said upwardly projecting portion and said upwardly projecting portion together comprising a structure about said cutout portion;

said part being disposed outward of said upwardly projecting portion;

said structure comprising a one-piece continuous substantially uniform structure made from substantially the same material therealong;

said part extending a substantial distance outward from said upwardly projecting portion;

said hot plate being disposed adjacent to and being disposed above said upwardly projecting portion of said cook top; and

said upwardly projecting portion being configured and disposed to support said hot plate.

12. The device according to claim 11 wherein said hot plate and said upwardly projecting portion are configured to permit movement of said hot plate due to thermal expansion of said hot plate relative to said projecting portion and to permit movement substantially parallel to and above said plane of said cook top.

13. The device according to claim 12 wherein:

said projecting portion extends out of the plane of said cook top;

said projecting portion is configured and disposed to form an elevated portion;

said elevated portion is configured and disposed to form a bearing for said heating arrangement; and

said elevated portion comprises one of (a) (b) and (c);

(a) a cone frustrum;

(b) a spherical segment; and

(c) a cone.

14. The device according to claim 13 comprising:

said cook top comprising first and second sides, said first side being configured to be disposed above said second side;

said hot plate being disposed adjacent said first side of said cook top;

a cover to cover a region below said cutout of said cook top;

said cover being disposed adjacent said second side of said cook top and adjacent said cutout portion of said cook top;

said cover being disposed to abut said second side of said cook top;

said cover being disposed to form a substantially enclosed region with said cook top and said hot plate, adjacent said cutout portion of said cook top;

a connecting element to hold said heating arrangement adjacent said cutout portion of said cook top;

said connecting element being securely connected to said hot plate; and

said connecting element being releasably connected to said cover.

15. The device according to claim 14 wherein:

said carrier comprises a ceramic of high thermal conductivity;

said cook top comprises at least one of (d), (e), (f), and (g);

(d) glass-ceramic;

(e) glass;

(f) ceramic; and

(g) metal;

said elevated portion comprises a surface, said surface of said elevated portion being disposed substantially parallel to said plane of said cook top;

said projecting portion defines the outside of said cutout portion of said cook top;

said carrier comprises an outer portion;

said outer portion of said carrier is disposed to overlap said projecting portion of said cook top; and

said hot plate is connected in said cutout.

16. The device according to claim 15 wherein said elevated portion comprises one of (h), (i), and (j):

(h) a circular portion;

(i) an oval portion; and

(j) an elliptical portion.

17. The device according to claim 16 wherein said elevated portion comprises at least one of:

a circular cone frustrum, and a circular cone.

18. The device according to claim 17 comprising:

said cover being one of (k) and (l);

(k) formed from said cook top by shaping; and

(l) a separate piece from said cook top, said separate piece comprising at least one of;

metal, and plastic;

said cover comprising at least one orifice;

said at least one orifice being disposed and configured to permit said connecting element to be firmly and releasably connected to said cover;

said fastening element being hard-soldered to said hot plate;

a gasket;

said elevated portion comprising a contact portion to contact said hot plate;

said gasket being disposed at least one of;

between said contact portion and said hot plate to contact said hot plate and said contact portion, and between said cover and said cook top to contact said cover and said cook top;

said gasket comprises at least one of;

a graphite containing material and a ceramic fiber material;

an insulating material;

said insulating material being disposed in said substantially enclosed region;

said insulating material being at least one of;

heat insulating; and

electrically insulating;

heating conductors disposed in said substantially enclosed region;

electrical leads disposed in said substantially enclosed region;

cable strain relief devices disposed in said substantially enclosed region;

cable leadthroughs disposed in said substantially enclosed region; and

said connecting element comprising one of (m) and (n);

(m) at least one snap hook;

each of said at least one snap hook comprising a nose portion; and

said nose portion of each of said at least one snap hook being configured and disposed to connect said connecting element to said cover through a corresponding one of said at least one orifice; and

(n) at least one threaded bolt;

said at least one thread bolt being disposed through a corresponding one of said at least one orifice; and

at least one threaded nut, said at least one threaded nut being disposed on a corresponding one of said at least one threaded bolt to secure said cover to said connecting element.

19. A device for cooking food, said device comprising:

a cook top, said cook top defining a plane;

said cook top comprising a cutout portion;

a hot plate comprising a carrier and an electrical heating element;

said hot plate being disposed at said cutout portion of said cook top;

said cook top comprising a first portion, said first portion being disposed about and adjacent said cutout portion of said cook top;

said first portion of said cook top being configured to be disposed to project upwardly a substantial distance from said plane of said cook top;

a part of said cook top adjacent said upwardly projecting portion and said upwardly projecting portion together comprising a structure about said cutout portion;

said part being disposed outward of said upwardly projecting portion;

said structure comprising a one-piece, continuous structure made from substantially the same material;

said part extending a substantial distance outward from said upwardly projecting portion;

said hot plate being disposed adjacent to and being disposed above said upwardly projecting portion of said cook top; and

said upwardly projecting portion being configured and disposed to support said hot plate.

20. The device according to claim 19 wherein said hot plate and said upwardly projecting portion are configured to permit movement of said hot plate due to thermal expansion of said hot plate relative to said projecting portion and to permit movement substantially parallel to and above said plane of said cook top.