US3756040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryogenic refrigerant evaporator-diffuser
Assignee: Individual
•
Filing: 1972-04-12
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Granted: 1973-09-04
•
Expires: 1992-04-12
Abstract
Abstract A cryogenic refrigerant evaporator-diffuser system comprising an elongated conduit into which a cryogenic liquid refrigerant is injected. A plurality of orifices are provided at predetermined intervals along the length of the conduit to allow the injected liquid refrigerant to vent into channels formed around the outer surface of the conduit. A continuous outer jacket of rigid, highly porous material surrounds the channels whereby the liquid refrigerant injected into the channels is uniformly exuded at negligible velocities through the pores of the jacket for its full length to substantially uniformly distribute the refrigerating effect to the surrounding space.
Inventors
- 👤 L Westling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:17
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A cryogenic refrigeration evaporator-diffuser comprising an elongated central conduit having a reduced inlet opening and a plurality of outlets spaced at predetermined levels on the top portion of the conduit along the entire length thereof, a rigid, porous jacket formed from a molecular sieve completely surrounding said elongated conduit, and a resilient spacer held between said jacket and said conduit and spirally wrapped around the entire length of said conduit to form a spiral channel between adjacent portions of the spacer, said outlet openings being fluidly connected to said spiral channel whereby, refrigerant injected into said conduit will be vented into said spiral channel for substantially even distribution within said channel and over the inner surface of said jacket whereby, said refrigerant will pass through the pores of the jacket to be exuded into the atmosphere of said portable enclosure at a substantially negligible velocity.
Claim 2
Dependent Claim
145 words
A cryogenic refrigeration evaporator-diffuser comprising an elongated central conduit having a reduced inlet opening and a plurality of outlets spaced at predetermined levels on the top portion of the conduit along the entire length thereof, a rigid, porous jacket formed from a molecular sieve completely surrounding said elongated conduit, and a resilient spacer held between said jacket and said conduit and spirally wrapped around the entire length of said conduit to form a spiral channel between adjacent portions of the spacer, said outlet openings being fluidly connected to said spiral channel whereby, refrigerant injected into said conduit will be vented into said spiral channel for substantially even distribution within said channel and over the inner surface of said jacket whereby, said refrigerant will pass through the pores of the jacket to be exuded into the atmosphere of said portable enclosure at a substantially negligible velocity.
References Cited (Backward Citations)
US2497947A
Cited
US2766597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |