US4653468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cookware handle
Assignee: Copernicus Corp
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Filing: 1986-01-13
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Granted: 1987-03-31
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Expires: 2006-01-13
Abstract
Abstract A cooking pan includes a handle made up of a tubular stainless steel insert and upper and lower wires. The upper wire wraps around the insert and is welded at each end to the pan body. The lower wire is welded at one end to the pan body and at the other end to the insert. The wires provide three struts connecting the insert and the pan body, and are formed of a configuration and material adapted to minimize heat transfer to the insert. In this way an all-metal handle is provided which does not heat excessively in use. Preferably the insert is inclined upwardly towards the pan at an angle of 25° to increase the comfort of the user.
Inventors
- 👤 Charles D. Lemme
- 👤 Tracy R. Lemme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:31
CPC Classifications
A; A47; A47J; A47J37/00; A47J37/10; A47J45/00; A47J45/06; A47J45/061
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
241 words
A cooking pan comprising: a pan body which comprises a bottom that defines a horizontal plane; a tubular metal insert which defines an outer end and an inner end; a first metal wire which defines a central bight section which extends around and is secured to the insert and two end sections which are rigidly secured to the pan body; a second metal wire which is secured at one end to the pan body and at the other end to the inner end of the insert, wherein the second wire is spaced vertically from the first wire at the insert and at the pan body; said insert defining a holding axis angled at about 15°-40° to the horizontal plane with the inner end farther from the horizontal plane than the outer end; said wires extending upwardly between the pan body and the insert with respect to the holding axis such that the inner end of the insert is positioned above the end sections of the first wire; said wires characterized by a radiating surface A between the pan body and the insert, a total cross-sectional area X, a thermal conductivity k, and a length L between the pan body and the insert, wherein the product kX/L is no greater than about 0.03 (BTU/hour-°F.), and wherein A is no less than about 3 square inches such that the insert remains cool enough to touch even when the pan body contains boiling water.
Claim 2
Dependent Claim
241 words
A cooking pan comprising: a pan body which comprises a bottom that defines a horizontal plane; a tubular metal insert which defines an outer end and an inner end; a first metal wire which defines a central bight section which extends around and is secured to the insert and two end sections which are rigidly secured to the pan body; a second metal wire which is secured at one end to the pan body and at the other end to the inner end of the insert, wherein the second wire is spaced vertically from the first wire at the insert and at the pan body; said insert defining a holding axis angled at about 15°-40° to the horizontal plane with the inner end farther from the horizontal plane than the outer end; said wires extending upwardly between the pan body and the insert with respect to the holding axis such that the inner end of the insert is positioned above the end sections of the first wire; said wires characterized by a radiating surface A between the pan body and the insert, a total cross-sectional area X, a thermal conductivity k, and a length L between the pan body and the insert, wherein the product kX/L is no greater than about 0.03 (BTU/hour-°F.), and wherein A is no less than about 3 square inches such that the insert remains cool enough to touch even when the pan body contains boiling water.
Claim 3
Dependent Claim
18 words
The invention of claim 1 wherein the holding axis is aligned at about 25° to the horizontal plane.
Claim 4
Dependent Claim
23 words
The invention of claim 1 wherein the insert and the wires are formed of stainless steel and wherein k is about 0.67 BTU/(hour-inch-°F.).
Claim 5
Dependent Claim
25 words
The invention of claim 1 wherein the diameter of each of the wires is less than about 0.2 inches and L is about 3 inches.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |