Patent US1983264A successfully refreshed from Google Patents.
Patent US4434992A successfully refreshed from Google Patents.
US4434992A
Expired / Lapsed
US
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Trolley for use in transporting a boat
Assignee: Abt Products Ltd
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Filing: 1981-04-21
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Granted: 1984-03-06
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Expires: 2001-04-21
Abstract
Abstract A trolley for use in transporting, and particularly launching, a boat comprises a channel-sectioned hard rubber block which, in use, straddles the keelplate of the boat, and two-part rollers rotatable on opposite ends of a spindle which extends through the block. The trolley is secured to the keelplate by a slideable U-shaped detent element, the upper limb of which can be passed through registering holes in the side flanges of the block and in the keelplate. Various alternative detent arrangements may be employed.
Inventors
- 👤 Anthony W. Beach-Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:40
CPC Classifications
B; B63; B63C; B63C13/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
168 words
A trolley for use in transporting a boat, comprising a body element formed from a unitary block of resilient material shaped to engage a part of the boat at the bottom thereof, a metal retaining element projecting from the block of resilient material and adapted for releasable engagement with said part of the boat, so as to secure the trolley to the boat, a spindle extending through the block of resilient material so as to project from opposite sides thereof, and a pair of wheels rotatably mounted on the spindle on opposite sides of the block of resilient material, the block being T-shaped and having a horizontal cross piece that overlies said wheels and a vertical stem through which said spindle extends, said metal retaining element being of inverted U-shape having two upright legs whose upper ends are interconnected and whose lower ends are embedded in opposite ends of said horizontal cross piece said U-shaped element being disposed in a plane parallel to the axes of said wheels.
Claim 2
Dependent Claim
168 words
A trolley for use in transporting a boat, comprising a body element formed from a unitary block of resilient material shaped to engage a part of the boat at the bottom thereof, a metal retaining element projecting from the block of resilient material and adapted for releasable engagement with said part of the boat, so as to secure the trolley to the boat, a spindle extending through the block of resilient material so as to project from opposite sides thereof, and a pair of wheels rotatably mounted on the spindle on opposite sides of the block of resilient material, the block being T-shaped and having a horizontal cross piece that overlies said wheels and a vertical stem through which said spindle extends, said metal retaining element being of inverted U-shape having two upright legs whose upper ends are interconnected and whose lower ends are embedded in opposite ends of said horizontal cross piece said U-shaped element being disposed in a plane parallel to the axes of said wheels.
Claim 3
Dependent Claim
12 words
A trolley according to claim 1, wherein said resilient material is rubber.
Claim 4
Dependent Claim
31 words
A trolley according to claim 1, wherein said wheels are in the form of rollers, each roller comprising two similar adjacent co-axial roller parts which are rotatable relatively to one another.
References Cited (Backward Citations)
US3125351A
Cited
US1617984A
Cited
US2550219A
Cited
US2673991A
Cited
US2966368A
Cited
US3135560A
Cited
US3406985A
Cited
US3687476A
Cited
US3831211A
Cited
US3977690A
Cited
DE2640236A1
Cited
DE2929084A1
Cited
US4243239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |