Patent US4923145A successfully refreshed from Google Patents.
US4923145A
Expired / Lapsed
US
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Aircraft landing equipment
Assignee: WOODVILLE POLYMER ENGINEERING Ltd A BRITISH CORP
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Filing: 1988-05-11
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Granted: 1990-05-08
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Expires: 2008-05-11
Abstract
Abstract Auxiliary landing equipment for aircraft which comprises a plurality of inflatable cushions arranged in a predetermined array relative to each other and structure for securing them to the aircraft so that, in an inflated state, the cushions can contact the ground during landing or on take-off and so that, in a deflated state, the equipment can closely follow the contour of the aircraft part to which it is attached.
Inventors
- 👤 Jeffrey C. Broadhurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:55
CPC Classifications
B; B60; B60V; B60V3/00; B60V3/08; B64; B64D; B64D2201/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
88 words
In combination with an aircraft with primary landing equipment comprising a plurality of wheels, auxiliary landing equipment comprising an inflatable support structure attachable to the aircraft, a plurality of inflatable cushions attached in a predetermined array to the support structure, inflation means for inflating the support structure and cushions to deploy the auxiliary landing equipment for landing, and deflating means for deflating the support structure and cushions for stowing the same, at least some of the cushions comprising a plurality of individual cushion cells interconnected by air passageways.
Claim 2
Dependent Claim
88 words
In combination with an aircraft with primary landing equipment comprising a plurality of wheels, auxiliary landing equipment comprising an inflatable support structure attachable to the aircraft, a plurality of inflatable cushions attached in a predetermined array to the support structure, inflation means for inflating the support structure and cushions to deploy the auxiliary landing equipment for landing, and deflating means for deflating the support structure and cushions for stowing the same, at least some of the cushions comprising a plurality of individual cushion cells interconnected by air passageways.
Claim 3
Dependent Claim
30 words
Structure as claimed in claim 1, in which a plurality of cushions are attached to the support structure so as to extend along the length of the aircraft in use.
Claim 4
Dependent Claim
21 words
Structure as claimed in claim 2, in which the support structure includes means for stabilizing the cushions relative to the aircraft.
Claim 5
Dependent Claim
27 words
Structure as claimed in claim 1, in which the cushion cells are arranged in a vertical tier with adjacent surfaces being bonded together to form internal webs.
Claim 6
Dependent Claim
30 words
Structure as claimed in claim 1, which includes means to hold the cushions in the predetermined array in the form of interconnecting membranes between at least some of the cushions.
Claim 7
Dependent Claim
90 words
In combination with an aircraft with primary landing equipment comprising a plurality of wheels, auxiliary landing equipment comprising an inflatable support structure attachable to the aircraft, a plurality of inflatable cushions attached in a predetermined array to the support structure, inflation means for inflating the support structure and cushions to deploy the auxiliary landing equipment for landing, deflating means for deflating the support structure and cushions for stowing the same, a skid attached to individual cushions or to the lowermost surface of the equipment, and means for lubricating said skid.
Claim 8
Dependent Claim
90 words
In combination with an aircraft with primary landing equipment comprising a plurality of wheels, auxiliary landing equipment comprising an inflatable support structure attachable to the aircraft, a plurality of inflatable cushions attached in a predetermined array to the support structure, inflation means for inflating the support structure and cushions to deploy the auxiliary landing equipment for landing, deflating means for deflating the support structure and cushions for stowing the same, a skid attached to individual cushions or to the lowermost surface of the equipment, and means for lubricating said skid.
Claim 9
Dependent Claim
12 words
Structure as claimed in claim 6, in which the skid is replaceable.
References Cited (Backward Citations)
US2711868A
Cited
US3631938A
Cited
US3595336A
Cited
US3677360A
Cited
US3790110A
Cited
US4019698A
Cited
US4004761A
Cited
DE2826619A1
Cited
US4382567A
Cited
US4697767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |