Patent US3910215A successfully refreshed from Google Patents.
US3910215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety system for hydrofoil craft
Assignee: Boeing Co
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Filing: 1973-06-21
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Granted: 1975-10-07
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Expires: 1993-06-21
Abstract
Abstract A hydrofoil craft having foils carried on struts, the struts being supported for pivotal movement relative to the hull of the craft and held in position during foil-borne operation by a substantially rigid restraining device. The restraining device constitutes a mechanical fuse device which holds the strut in place during normal operation but ruptures or yields in response to impact forces on the strut to permit the strut to pivot in case it should strike an object in the water during high speed operation. The pivotal movement of the strut reduces the dangerously rapid deceleration that would otherwise occur and minimizes structural damage to the craft.
Inventors
- 👤 Kenneth L Soderman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:53
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/24; B63B1/28; B63B1/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
128 words
In a hydrofoil craft having a hull structure and forward and aft struts carrying foils, a support structure for said forward strut, said support structure being pivotally mounted on the hull structure for movement in the aft direction, the forward strut being pivotally mounted on the support structure for movement relative to the support structure in the forward direction between a retracted position for hull-borne operation of the craft and an extended position for foil-borne operation, and means for restraining the support structure against pivotal movement, said restraining means being a substantially rigid structure adapted to hold the supporting structure against movement under loads below a predetermined value and to yield and permit movement of the support structure and forward strut in response to loads above said value.
Claim 2
Dependent Claim
128 words
In a hydrofoil craft having a hull structure and forward and aft struts carrying foils, a support structure for said forward strut, said support structure being pivotally mounted on the hull structure for movement in the aft direction, the forward strut being pivotally mounted on the support structure for movement relative to the support structure in the forward direction between a retracted position for hull-borne operation of the craft and an extended position for foil-borne operation, and means for restraining the support structure against pivotal movement, said restraining means being a substantially rigid structure adapted to hold the supporting structure against movement under loads below a predetermined value and to yield and permit movement of the support structure and forward strut in response to loads above said value.
Claim 3
Dependent Claim
27 words
The combination of claim 1 in which said rigid structure is adapted to rupture and release the supporting structure in response to loads above said predetermined value.
Claim 4
Dependent Claim
37 words
The combination of claim 1 in which said rigid structure comprises energy absorbing means adapted to yield and permit pivotal movement of the supporting structure at a limited rate in response to loads above said predetermined value.
Claim 5
Dependent Claim
24 words
The combination of claim 1 and including means carried on said supporting structure for moving the forward strut between said retracted and extended positions.
Claim 6
Dependent Claim
42 words
The combination of claim 4 in which the foil carried by said forward strut includes control surfaces, and actuating means carried on the supporting structure for effecting movement of said control surfaces and limited angular movement of the strut about its axis.
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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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |