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Patent US4654097A successfully refreshed from Google Patents.
US4654097A
Expired / Lapsed
US
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Process for preparing bodies of rocket propulsion units
Assignee: Safran Aircraft Engines SAS
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Filing: 1984-11-21
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Granted: 1987-03-31
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Expires: 2004-11-21
Abstract
Abstract The invention relates to a process for preparing a body of a rocket propulsion unit comprising a rubber wall forming a chamber which contains a propergol and an outer wall forming reinforcement, characterized in that the following steps are carried out: the rubber chamber is coated with an adhesive agent, the whole is baked at a temperature higher than about 100° C., the propergol is introduced into the chamber, the outer wall is made by depositing impregnated fibers around the chamber and polymerization at a temperature lower than about 100° C.
Inventors
- 👤 Dominique Sauvage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:15
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/24; F02K9/32; F02K9/34; F02K9/346
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
114 words
A process for preparing a rocket propulsion unit body which includes a rubber wall chamber containing a mixture of solid fuel and oxidant and provided with an outer reinforcing wall comprising the steps of: coating the outer surface of a rubber chamber with a primer; baking said primer coated rubber chamber at a temperature above about 100° C. to cure the primer and to vulcanize the rubber; introducing a mixture of solid fuel and oxidant into said baked chamber; coating the outer side of said chamber with a resin provided with reinforcing fibers; and polymerizing said resin at a temperature below about 100° C., said temperature being insufficient to effect curing of said primer.
Claim 2
Dependent Claim
114 words
A process for preparing a rocket propulsion unit body which includes a rubber wall chamber containing a mixture of solid fuel and oxidant and provided with an outer reinforcing wall comprising the steps of: coating the outer surface of a rubber chamber with a primer; baking said primer coated rubber chamber at a temperature above about 100° C. to cure the primer and to vulcanize the rubber; introducing a mixture of solid fuel and oxidant into said baked chamber; coating the outer side of said chamber with a resin provided with reinforcing fibers; and polymerizing said resin at a temperature below about 100° C., said temperature being insufficient to effect curing of said primer.
Claim 3
Dependent Claim
24 words
A process in accordance with claim 1 wherein said primer is compatible with said rubber and said resin is bondable to said baked primer.
References Cited (Backward Citations)
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US3555816A
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US4120153A
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US3813308A
Cited
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Cited
US4389264A
Cited
US4495764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |