Patent US3787186A successfully refreshed from Google Patents.
US3787186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcium hydride gas generator
Assignee: United States Department of the Navy
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Filing: 1972-02-02
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Granted: 1974-01-22
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Expires: 1992-02-02
Abstract
Abstract A differential area gas operated hydraulic pump used in a bootstrap mode to pump water into a reaction chamber. Water is pumped into the reaction chamber until the level reaches a quantity of calcium hydride (Cah2) and reacts to produce just enough gas to exceed the operating pressure, whereupon the pump will stall. No further hydrolysis takes place until the chamber pressure is relieved at which time the pump again operates to raise the water level into contact with unreacted CaH2.
Inventors
- 👤 R Geres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:09
CPC Classifications
B; B01; B01J; B01J7/00; B01J7/02; C; C01; C01B; C01B3/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
16 words
The system of claim 1 further comprising means for operating said generator in a demand mode.
Claim 2
Dependent Claim
40 words
The system of claim 1 further comprising means to control said pump for pumping water into said chamber until the level reaches said hydride and reacts to produce sufficient pressure to cause said pump to stall until said pressure subsides.
Claim 3
Dependent Claim
24 words
The system of claim 1 further comprising regulator means located in said conveyance means for maintaining a constant maximum gas pressure entering said pump.
Claim 4
Dependent Claim
16 words
The system of claim 1 further comprising said hydride being in the form of a cartridge.
References Cited (Backward Citations)
US988645A
Cited
US778052A
Cited
US669140A
Cited
US713658A
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US738827A
Cited
US3174833A
Cited
US3291572A
Cited
US3268298A
Cited
US3453086A
Cited
US3542524A
Cited
GB1214195A
Cited
US3554707A
Cited
US3561926A
Cited
US3585007A
Cited
US3667216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |