US4295346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recirculating vapor system for gelling cryogenic liquids
Assignee: Aerojet Rocketdyne Inc
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Filing: 1980-09-08
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Granted: 1981-10-20
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Expires: 2000-09-08
Abstract
Abstract A system for gelling cryogenic liquid in which a jet pump is used to educt cryogenic vapor from a gel storage container, mix that educted vapor with steam or other gelant vapor, and inject the resultant mixture into a fine spray of cryogenic droplets, is described herein.
Inventors
- 👤 Lawrence C. Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:09
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
61 words
A system for gelling cryogenic liquid comprising: means for providing a spray of cryogenic liquid droplets; a vessel for receiving said cryogenic spray; a jet pump for introducing a gelant into said cryogenic spray disposed to also educt cryogenic vapor from said vessel; and, means for providing a flow of gelant fluid to said jet pump to thereby drive said pump.
Claim 2
Independent Claim
61 words
A system for gelling cryogenic liquid comprising: means for providing a spray of cryogenic liquid droplets; a vessel for receiving said cryogenic spray; a jet pump for introducing a gelant into said cryogenic spray disposed to also educt cryogenic vapor from said vessel; and, means for providing a flow of gelant fluid to said jet pump to thereby drive said pump.
Claim 3
Dependent Claim
59 words
The system of claim 1 in which: said means for providing a cryogenic spray comprise a spray column for providing a spray of droplets having mean diameters no larger than about one mil; and said means for providing gelant fluid to said jet pump comprise means for providing a gaseous phase flow of a gelling agent to said pump.
Claim 4
Dependent Claim
59 words
The system of claim 2 in which: said jet pump is disposed to introduce a mixture of cryogenic vapor and frozen gelant particles into said spray column; and said spray column is of sufficient length to provide gelant particles received from said jet pump with a stay time in said spray of cryogenic droplets of a leat one millisecond.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |