Patent US3798791A successfully refreshed from Google Patents.
US3854680A
Expired / Lapsed
US
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Device for steadying loads suspended from aircrafts
Assignee: R Alkan et Cie
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Filing: 1974-03-07
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Granted: 1974-12-17
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Expires: 1994-03-07
Abstract
Abstract This device for steadying, notably against lateral oscillation, a load releasably suspended from an aircraft comprises a pair of fork-shaped hooks rigid with the aircraft and co-acting with bridge pieces rigid with the load and having a flat top face, and a pair of wedge members associated with each hook; each wedge member consists of a piston engaging the top face of the bridge piece under the action of a fluid under pressure passing through a non-return valve.
Inventors
- 👤 J Hasquenoph
- 👤 P Coutin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:59
CPC Classifications
B; B64; B64D; B64D1/00; B64D1/02; B64D1/04; B64D1/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
104 words
Device for steadying loads suspended from aircrafts, wherein fork-shaped hooks rigid with a carrier member of the aircraft coact with bridge pieces with the load and having a flat top face, comprising a pair of wedge members associated with each forkshaped hook and transversely disposed on the opposite sides of said hook, each wedge member consisting of a hydraulic piston sliding within a cylinder rigid with the carrier member of the aircraft and in a direction perpendicular to the top face of the bridge piece in order to engage said top face in response to a fluid under pressure supplied through a non-return valve.
Claim 2
Dependent Claim
104 words
Device for steadying loads suspended from aircrafts, wherein fork-shaped hooks rigid with a carrier member of the aircraft coact with bridge pieces with the load and having a flat top face, comprising a pair of wedge members associated with each forkshaped hook and transversely disposed on the opposite sides of said hook, each wedge member consisting of a hydraulic piston sliding within a cylinder rigid with the carrier member of the aircraft and in a direction perpendicular to the top face of the bridge piece in order to engage said top face in response to a fluid under pressure supplied through a non-return valve.
Claim 3
Dependent Claim
46 words
Device according to claim 1, wherein said fork-shaped hook engages during its opening movement one end of a pivoting lever of which the other end engages in turn an extension of said non-return valve to open said valve and allow the release of the hydraulic piston.
References Cited (Backward Citations)
US3268188A
Cited
US3784132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |