Patent US4258641A successfully refreshed from Google Patents.
US4258641A
Expired / Lapsed
US
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Marine fender
Assignee: Bridgestone Corp
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Filing: 1978-11-03
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Granted: 1981-03-31
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Expires: 1998-11-03
Abstract
Abstract A marine fender comprising a hollow cylindrical body formed of a resilient rubber block and an annular groove circumferentially extending along at least one end of the cylindrical inner wall of the hollow cylindrical body.
Inventors
- 👤 Masatoshi Wakamiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:47
CPC Classifications
E; E02; E02B; E02B3/00; E02B3/20; E02B3/26; Y; Y02; Y02A; Y02A30/00; Y02A30/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
105 words
In a marine fender comprising a hollow cylindrical body formed of a resilient rubber block and having one end fitted to a quay wall or the like, the other end being provided with means to provide a berthing face, the improvement comprising an annular groove circumferentially extending along at least one end of the cylindrical inner wall of said hollow cylindrical body, said hollow cylindrical body having a flat outer wall, and said annular groove being quarter circular in section and including a tapered portion extending from the inner side of said quarter circle to a center cylindrical inner wall of said hollow cylindrical body.
Claim 2
Dependent Claim
105 words
In a marine fender comprising a hollow cylindrical body formed of a resilient rubber block and having one end fitted to a quay wall or the like, the other end being provided with means to provide a berthing face, the improvement comprising an annular groove circumferentially extending along at least one end of the cylindrical inner wall of said hollow cylindrical body, said hollow cylindrical body having a flat outer wall, and said annular groove being quarter circular in section and including a tapered portion extending from the inner side of said quarter circle to a center cylindrical inner wall of said hollow cylindrical body.
Claim 3
Dependent Claim
121 words
The marine fender according to claim 1, wherein the position and size of said annular groove are defined by the following conditions, i.e. 0.08H>A>0.04H 0.2H>B>0.1H 0.4H>C>0.2H and 0.10H>D>0.02H where H is a height of the marine fender, A is a distance from one side of the annular groove to the end surface of the fixture plate, B is a distance from the center of the annular groove to the end surface of the fixture plate, C is a distance from that side of the annular groove which adjoins through a tapered inner periphery to the center cylindrical inner wall of the hollow cylindrical body to the end surface of the fixture plate and D is a depth of the annular groove.
Claim 4
Dependent Claim
28 words
The marine fender of claim 1, wherein said means to provide a berthing face comprises a shock receiving plate on said other end of said hollow cylindrical body.
Claim 5
Dependent Claim
28 words
The marine fender of claim 1, wherein said means to provide a berthing face comprises a resilient rubber block closing said other end of said hollow cylindrical body.
References Cited (Backward Citations)
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Cited
US3134585A
Cited
US3507123A
Cited
US3600896A
Cited
US3708988A
Cited
US3690280A
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US3999497A
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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) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |