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US4143711A Expired / Lapsed US ⏱️ 0.0 years remaining

Portable refrigerator unit

Assignee: BIPOL Ltd
•
Filing: 1978-03-31
•
Granted: 1979-03-13
•
Expires: 1998-03-31
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Abstract

Abstract A portable refrigerator unit is cooled by a thermoelectric element of the Peltier type, having hot and cold faces adapted to be energized by an external DC source, which can be disconnected from the unit to make the unit entirely portable. The thermoelectric unit has a cold face in contact with an internal thermal sink, which in turn is in contact with a heat conducting lining, and its hot face in contact with an external thermal sink, having heat dissipating means associated therewith. The internal thermal sink has a large portion imbedded in an insulated wall of the unit, and a relatively small portion having a face free of the insulating material, which free face is in heat-transfer contact with the cold face of the thermoelectric unit. The external thermal sink with its heat dissipating means is spaced from said unit so that its surfaces are exposed to the ambient atmosphere. The external thermal sink and its associated heat dissipating means is made of a single sheet having a flat central portion, laterally extending loops with the free ends thereof underlying the flat central portion with the three portions in heat-transfer contact with each other to form the thermal sink.

Inventors

  • 👤 Shlomo Beitner

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 20:26
CPC Classifications
F; F25; F25B; F25B21/00; F25B21/02; F25D; F25D11/00; F25B2321/00; F25B2321/02; F25B2321/023; F25B2321/025; F25B2321/0251; F25D2400/00; F25D2400/12; F25D2400/40

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 64 words
A heat dissipator which comprises a thermal sink of heat-conducting material comprising a plurality of sheets having portions lapped in heat transfer contact with each other to form a flat central portion and laterally extending portions spaced from each other to permit the free flow of ambient air between them, in which at least some of the laterally extending portions are formed into loops.
Claim 2
Dependent Claim 64 words
A heat dissipator which comprises a thermal sink of heat-conducting material comprising a plurality of sheets having portions lapped in heat transfer contact with each other to form a flat central portion and laterally extending portions spaced from each other to permit the free flow of ambient air between them, in which at least some of the laterally extending portions are formed into loops.
Claim 3
Dependent Claim 17 words
The heat dissipator unit of claim 1, in which each loop is integral with two lapped portions.
Claim 4
Dependent Claim 19 words
The heat dissipator unit of claim 2, in which one of the lapped portions is integral with two loops.

References Cited (Backward Citations)

US3095037A Cited
US3194024A Cited
US3412566A Cited
US3310953A Cited
US4007600A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-03-12 1982-09-11 1983-03-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-03-12 1986-09-11 1987-03-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-03-12 1990-09-11 1991-03-13 $7700.00 Window Closed / Lapsed

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