Patent US4576105A successfully refreshed from Google Patents.
US4576105A
Expired / Lapsed
US
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Rescue equipment for submarine vehicles
Assignee: Erno Raumfahrttechnik GmbH
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Filing: 1984-05-29
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Granted: 1986-03-18
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Expires: 2004-05-29
Abstract
Abstract The principal element of a rescue equipment for submarine vehicles includes a principal gas generator in which hydrazine is forced through a catalytic reactor causing the hydrazine to decompose and the developed gas is used to blow a ballast tank. The hydrazine is moved into and through the reaction chamber by operation of a second pilot gas generator likewise operating on the principle of decomposing hydrazine and being operated in a regenerative feedback fashion through a differential piston arrangement so that upon an initial triggering the gas developed by the pilot gas generator drives the differential piston so that increasing pressure is available for driving auxiliary hydrazine through the reaction chamber of the pilot gas generator until a stable operating point is attained. This operating point is automatically adjusted to the effective water pressure against which the principal gas generator has to operate to thereby render blowing time of the ballast tank independent from the depth of the vehicle.
Inventors
- 👤 Hermann Erdmann
- 👤 Hermann Ramaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:05
CPC Classifications
B; B63; B63G; B63G8/00; B63G8/14; B63G8/22; B01; B01J; B01J7/00; B01J7/02; B63G8/40
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
99 words
In a rescue equipment for submarine vehicle, a gas generator device for blowing ballast tanks including a storage facility for a liquidous decomposable medium and a first principal gas generator; an auxiliary propulsion facility for driving the liquidous medium into the principal gas generator comprising: a second, pilot gas generator; feedback and amplification means having an input connected to be responsive to gas pressure generated by the pilot generator and having an output effective for controlling the operation of the pilot generator; and the pilot gas generator being connected for driving the liquidous medium out of its storage facility.
Claim 2
Dependent Claim
99 words
In a rescue equipment for submarine vehicle, a gas generator device for blowing ballast tanks including a storage facility for a liquidous decomposable medium and a first principal gas generator; an auxiliary propulsion facility for driving the liquidous medium into the principal gas generator comprising: a second, pilot gas generator; feedback and amplification means having an input connected to be responsive to gas pressure generated by the pilot generator and having an output effective for controlling the operation of the pilot generator; and the pilot gas generator being connected for driving the liquidous medium out of its storage facility.
Claim 3
Dependent Claim
53 words
Rescue equipment as set forth in claim 1 wherein said feedback and amplification means regeneratively increases an output pressure provided by said pilot gas generator until stable conditions are established wherein pressure in the storage facility and in the feedback means reflects ballast tank pressure as it depends upon depth of the vehicle.
Claim 4
Dependent Claim
73 words
Rescue equipment as in claim 1 wherein said second pilot gas generator includes a catalytically or chemically active reaction chamber, initiating means for providing a triggering pressure to initiate gas production by the second pilot gas generator, said feedback and amplification means being responsive to output pressure as produced by the second pilot gas generator and augmenting said triggering pressure for liquidous medium through the reaction chamber of the second pilot gas generator.
Claim 5
Dependent Claim
56 words
Rescue equipment as in claim 3 wherein said feedback and amplification means includes a differential piston arrangement having a larger area piston provided to be subjected to output pressure from the second pilot gas generator while the second smaller area piston provides pressure for driving liquidous reactant into the reaction chamber of the pilot gas generator.
Claim 6
Dependent Claim
19 words
Rescue equipment as in claim 4 wherein said two pistons are concentrically arranged and constructed in single piece configuration.
Claim 7
Dependent Claim
26 words
Rescue equipment as in claim 5 wherein said reaction chamber of that second pilot gas generator is disposed inside of the inner one of said pistons.
Claim 8
Dependent Claim
29 words
Rescue equipment as in claim 4, said initiating means being a gas reservoir available for applying its pressure in an emergency instance to said larger one of said pistons.
Claim 9
Dependent Claim
24 words
Rescue equipment as in claim 4 wherein said initiating means includes means for subjecting the larger one of said pistons to environmental water pressure.
Claim 10
Dependent Claim
161 words
In a rescue equipment for a submarine vehicle, a gas generator device for blowing ballast tanks including a storage facility for a liquidous decomposable medium and a first principal gas generator; an auxiliary propulsion facility for driving the liquidous medium into the principal gas generator comprising: a second, pilot gas generator including a reaction medium; a differential piston arrangement having a first, smaller piston provided for forcing said medium from said auxiliary storage facility through the reaction chamber of said pilot gas generator, the pilot gas generator having an output provided for communication and gas feeding into the storage facility of the principal gas generator; and a second larger area piston constructed for operating said first piston and provided for being subjected to gas pressure developed by said second pilot gas generator to thereby augment pressure for driving the auxiliary decomposable medium into the reaction chamber of the second pilot gas generator; and means for initiating movement of said second piston.
Claim 11
Dependent Claim
161 words
In a rescue equipment for a submarine vehicle, a gas generator device for blowing ballast tanks including a storage facility for a liquidous decomposable medium and a first principal gas generator; an auxiliary propulsion facility for driving the liquidous medium into the principal gas generator comprising: a second, pilot gas generator including a reaction medium; a differential piston arrangement having a first, smaller piston provided for forcing said medium from said auxiliary storage facility through the reaction chamber of said pilot gas generator, the pilot gas generator having an output provided for communication and gas feeding into the storage facility of the principal gas generator; and a second larger area piston constructed for operating said first piston and provided for being subjected to gas pressure developed by said second pilot gas generator to thereby augment pressure for driving the auxiliary decomposable medium into the reaction chamber of the second pilot gas generator; and means for initiating movement of said second piston.
Claim 12
Dependent Claim
16 words
Rescue equipment as in claim 9 wherein said reaction chamber is disposed inside said first piston.
Claim 13
Dependent Claim
30 words
Rescue equipment as in claim 9 wherein said second pilot gas generator and its reaction chamber is disposed directly and affixed to said storage facility of the principal gas generator.
Claim 14
Dependent Claim
34 words
Rescue equipment as in claim 10 wherein said second piston has an opening through which the gas from said gas pilot generator flows to become effective as regenerative actuator for moving the two pistons.
Claim 15
Dependent Claim
24 words
Rescue equipment as in claim 11 including a feedback pipe connecting said storage facility with a chamber to be effective on said larger piston.
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) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |