US3597937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-cooling device for beverage container
Assignee: Individual
•
Filing: 1969-06-06
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Granted: 1971-08-10
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Expires: 1989-06-06
Abstract
Abstract A device for cooling the contents of a container comprising a compressed gas chamber and a heat exchanger in heat-conducting relationship with the contents whereby in permitting the gas to expand into the heat exchanger, heat is absorbed for cooling the contents.
Inventors
- 👤 Eugene H Parks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:09
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/10; F25D3/107; F25D2331/00; F25D2331/80; F25D2331/805
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
163 words
A cooling device for cooling the contents in the internal cavity of a container comprising: a. A reservoir for holding a supply of gas under pressure; b. A closed expansion chamber having an internal passage through which said gas can flow; c. An orifice member forming a flow-restricting orifice joining said reservoir and chamber, to form a continuous gas fluid passage; d. Said reservoir, chamber and orifice member being formed of adjacent plates fixed together in an envelope forming the walls thereof and being sized to fit within the cavity with a portion of said device extending adjacent the top of the container whereby by puncturing, said device is activated by the forming of an opening joining the fluid passage and atmosphere to allow the gas to flow from the reservoir by passage through the orifice at a controlled rate, expand in said chamber and escape through the puncture to atmosphere for absorbing heat through the envelope walls to cool the container contents.
Claim 2
Dependent Claim
163 words
A cooling device for cooling the contents in the internal cavity of a container comprising: a. A reservoir for holding a supply of gas under pressure; b. A closed expansion chamber having an internal passage through which said gas can flow; c. An orifice member forming a flow-restricting orifice joining said reservoir and chamber, to form a continuous gas fluid passage; d. Said reservoir, chamber and orifice member being formed of adjacent plates fixed together in an envelope forming the walls thereof and being sized to fit within the cavity with a portion of said device extending adjacent the top of the container whereby by puncturing, said device is activated by the forming of an opening joining the fluid passage and atmosphere to allow the gas to flow from the reservoir by passage through the orifice at a controlled rate, expand in said chamber and escape through the puncture to atmosphere for absorbing heat through the envelope walls to cool the container contents.
Claim 3
Dependent Claim
52 words
A cooling device as defined in claim 1 wherein said fluid passage wall includes an opening in combination with a safety cap constructed to close said opening and fail when the pressure or temperature within the fluid passage exceeds a predetermined limit to permit expansion of the gas into the container cavity.
Claim 4
Dependent Claim
25 words
A cooling device as defined in claim 2 wherein said cap is accessible at the top of the container for puncturing to activate the device.
Claim 5
Dependent Claim
30 words
A cooling device as defined in claim 1 wherein said envelope is interlocked with the container after being placed in the cavity for holding the device rigidly within the cavity.
Claim 6
Dependent Claim
41 words
A cooling device as defined in claim 1 wherein said envelope is formed by adjacent plates fixed together along seams forming the outline of said fluid passage and forced apart between the seams to form the reservoir, orifice and expansion chamber.
Claim 7
Dependent Claim
22 words
A cooling device as defined in claim 5 wherein said orifice member is formed separately and clamped in place between said plates.
Claim 8
Dependent Claim
19 words
A cooling device as defined in claim 5 wherein said seams are formed by resistance welding said plates together.
Claim 9
Dependent Claim
33 words
A cooling device as defined in claim 2 wherein said cap is made of a fusible material which will melt at a predetermined temperature to permit escape of gas from the expansion chamber.
Claim 10
Dependent Claim
37 words
A cooling device as defined in claim 2 wherein said cap when inserted within the opening provides passages for charging the cooling device with the coolant before being fixed to said passage wall for closing the opening.
Claim 11
Dependent Claim
23 words
A cooling device as defined in claim 9 wherein said safety cap is fixed to said passage wall by a resistance welding process.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |