Patent US5088302A successfully refreshed from Google Patents.
US5088302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable cooler using chemical reaction
Assignee: Panasonic Holdings Corp
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Filing: 1991-04-11
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Granted: 1992-02-18
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Expires: 2011-04-11
Abstract
Abstract A portable cooler for cooling an article by utilizing the endothermic and exothermic phenomenon pertaining to a chemical reaction is disclosed, in which an adsorbent and a working medium are sealed in a reaction chamber defined between an inner wall and an outer wall, a working medium retaining member is disposed on the inner wall inside the reaction chamber for holding therein the working medium, the working medium retaining member being spaced from the adsorbent disposed on the outer wall, and a heater is held in contact with the adsorbent for regenerating the same, at least a part of said outer wall constituting a heat radiating portion.
Inventors
- 👤 Takeshi Tomizawa
- 👤 Koji Arita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:51
CPC Classifications
F; F25; F25B; F25B17/00; F25B17/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
104 words
A cooler comprising: (a) an inner wall defining a cooling chamber for receiving therein an article to be cooled; (b) an outer wall defining jointly with said inner wall a reaction chamber sealingly receiving therein an adsorbent and a working medium, said adsorbent being disposed on said outer wall; (c) a working medium retaining member disposed on said inner wall within said reaction chamber for holding therein said working medium, said working medium retaining member being spaced from said adsorbent; (d) a heater held in contact with said adsorbent; and (e) a heat radiating portion constituting at least a part of said outer wall.
Claim 2
Dependent Claim
104 words
A cooler comprising: (a) an inner wall defining a cooling chamber for receiving therein an article to be cooled; (b) an outer wall defining jointly with said inner wall a reaction chamber sealingly receiving therein an adsorbent and a working medium, said adsorbent being disposed on said outer wall; (c) a working medium retaining member disposed on said inner wall within said reaction chamber for holding therein said working medium, said working medium retaining member being spaced from said adsorbent; (d) a heater held in contact with said adsorbent; and (e) a heat radiating portion constituting at least a part of said outer wall.
Claim 3
Dependent Claim
24 words
A cooler according to claim 1, wherein said adsorbent is a material selected from the group consisting of activated carbon, zeolite and silica gel.
Claim 4
Dependent Claim
25 words
A cooler according to claim 1, wherein said working medium is a material selected from the group consisting of water, alcohol and a mixture thereof.
Claim 5
Dependent Claim
18 words
A cooler according to claim 1, wherein said working medium retaining member is made of a porous material.
Claim 6
Dependent Claim
19 words
A cooler according to claim 4, wherein said working medium retaining member is formed of a sintered metal fiber.
Claim 7
Dependent Claim
17 words
A cooler according to claim 4, wherein said working medium retaining member is formed of a fabric.
Claim 8
Dependent Claim
22 words
A cooler according to claim 1, further including an air-permeable adsorbent-supporting wall supporting thereon said adsorbent and facing toward said inner wall.
Claim 9
Dependent Claim
17 words
A cooler according to claim 7, wherein said adsorbent-supporting wall is a wire net of stainless steel.
Claim 10
Dependent Claim
14 words
A cooler according to claim 7, wherein said adsorbent-supporting wall is a plastic net.
Claim 11
Dependent Claim
26 words
A cooler according to claim 1, further including an air-permeable, heat-reflective insulating wall disposed on said working medium retaining member and facing to said outer wall.
Claim 12
Dependent Claim
21 words
A cooler according to claim 10, wherein said heat-reflective insulating wall is formed of a punching metal of mirror-finished stainless steel.
Claim 13
Dependent Claim
23 words
A cooler according to claim 1, wherein said adsorbent is electrically conductive, said heater comprising a sheathed heater embedded in said conductive adsorbent.
Claim 14
Dependent Claim
47 words
A cooler according to claim 1, further including a peripheral wall extending around said outer wall an defining jointly therewith an air-flow passage, said peripheral wall having at least one air inlet at one end thereof and at least one air outlet at the opposite end thereof.
References Cited (Backward Citations)
US4752310A
Cited
US4694659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-17 | 1995-08-19 | 1996-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-17 | 1999-08-19 | 2000-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-17 | 2003-08-19 | 2004-02-18 | $7700.00 | Window Closed / Lapsed |