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US4270067A Expired / Lapsed US ⏱️ 0.0 years remaining

Electric frying pan

Assignee: TRANS-CANADA LIFE-WARE Ltd
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Filing: 1978-10-18
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Granted: 1981-05-26
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Expires: 1998-10-18
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Abstract

Abstract The invention relates to an improved frying pan providing good thermal contact between the pan bottom and the heating element, the device comprising a pan adapted with threaded studs to the underside thereof, a support plate adapted with a depression shaped to hold a heating element and further adapted with holes for engaging the support plate on the studs, whereby when locknuts are tightened onto the studs, all parts of the heating element are subject to compression.

Inventors

  • 👤 Alvin W. Thomas
  • 👤 Benjamin G. Mills

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 14:56
CPC Classifications
A; A47; A47J; A47J37/00; A47J37/10; A47J37/105; H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/48; H05B3/50

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 213 words
An improved electric frying pan comprising: a pan constructed of an aluminum core and a layer of stainless steel on each of the surfaces thereof and including a bottom and a continuous peripheral side wall upstanding from the bottom, and at least two threaded studs connected to the underside of said bottom in spaced relationship with each other; means, resistant to heat conduction, to support said pan in an elevated position; a plurality of washers and companion threaded lock nuts adapted to be received as a set on each of said studs; an electrically insulated heating element of a generally circular cross-section including a flat upper surface portion for contacting the bottom of said pan, said element adapted to be connected to an electrical source; a support plate defining a depression of depth less than the thickness of said heating element and into which said heating element will lie, a series of first holes for engagement over said studs and a plurality of second holes adjacent the centre of said plate for drainage of water that may become trapped above said support plate; in which by advancing said nuts onto said studs until said nuts are tight to the support plate, all parts of said heating element are subject to a compressive load.
Claim 2
Dependent Claim 213 words
An improved electric frying pan comprising: a pan constructed of an aluminum core and a layer of stainless steel on each of the surfaces thereof and including a bottom and a continuous peripheral side wall upstanding from the bottom, and at least two threaded studs connected to the underside of said bottom in spaced relationship with each other; means, resistant to heat conduction, to support said pan in an elevated position; a plurality of washers and companion threaded lock nuts adapted to be received as a set on each of said studs; an electrically insulated heating element of a generally circular cross-section including a flat upper surface portion for contacting the bottom of said pan, said element adapted to be connected to an electrical source; a support plate defining a depression of depth less than the thickness of said heating element and into which said heating element will lie, a series of first holes for engagement over said studs and a plurality of second holes adjacent the centre of said plate for drainage of water that may become trapped above said support plate; in which by advancing said nuts onto said studs until said nuts are tight to the support plate, all parts of said heating element are subject to a compressive load.
Claim 3
Dependent Claim 18 words
An improved electric frying pan as claimed in claim 1 wherein said heating element is circular in shape.
Claim 4
Dependent Claim 61 words
An improved electric frying pan as claimed in claim 1 or claim 2 wherein; said pan is fitted with a lid adapted with a lifting means resistant to heat conduction, said pan further having at least two lifting handles composed of material resistant to heat conduction; said support means comprising a plurality of feet composed of material resistant to heat conduction.
Claim 5
Dependent Claim 39 words
An improved electric frying pan as claimed in claim 1 or claim 2 wherein: said support plate is constructed of stainless steel; and, said heating element is coated on its rounded surface area with a layer of silicone rubber.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-05-25 1984-11-24 1985-05-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-05-25 1988-11-24 1989-05-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-05-25 1992-11-24 1993-05-26 $7700.00 Window Closed / Lapsed

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