US3698734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailers
Assignee: Individual
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Filing: 1971-02-22
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Granted: 1972-10-17
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Expires: 1991-02-22
Abstract
Abstract A trailer, particularly a semi-trailer for carrying heavy and wide loads, has a central longitudinal spine attachable to a towing vehicle, and two wheel-mounted side members, connected to either side of the spine by parallel-motion links and thus movable towards or from the spine, in parallelism, to narrow or widen the trailer. At the rear the side members are connected by a telescopic bumper bar with two slidably interfitted parts. The side members are held in laterally adjusted position relative to the spine by locking means associated with the parallel motion links and with the telescopic bumper bar.
Inventors
- 👤 Colin Anthony Drake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:28
CPC Classifications
B; B62; B62D; B62D21/00; B62D21/14; B62D53/00; B62D53/04; B62D53/06; B62D53/067; B62D61/00; B62D61/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
226 words
A trailer having a frame including a longitudinal central spine, a wheel-mounted side member to each side of the spine, parallel-motion links connecting the spine to each of the side members in such manner that both of the side members may be moved in parallelism towards or from the spine, a telescopic bumper bar consisting of two slidably interfitted parts, one secured to the rear of one side member, the other secured to the rear of the other side member, link locking means adapted releasably to lock a parallel motion link connecting each side member to the spine in any selected one of a number of angular relationships to the side member, said link locking means comprising a plunger within the link, and spring-loading means adapted to extend the plunger into engagement with any selected one of a series of holes in the side member to which the link is connected, bumper locking means adapted releasably to lock the bumper bar in any selected one of a number of telescopically adjusted positions, said bumper locking means comprising a pair of laterally displaced plungers within the inner telescopic member, and spring-loading means adapted to extend the plungers into engagement with any selected ones of series of holes in the outer telescopic member, and pneumatic means for simultaneously retracting the plungers of said links and said bumper bar.
Claim 2
Dependent Claim
226 words
A trailer having a frame including a longitudinal central spine, a wheel-mounted side member to each side of the spine, parallel-motion links connecting the spine to each of the side members in such manner that both of the side members may be moved in parallelism towards or from the spine, a telescopic bumper bar consisting of two slidably interfitted parts, one secured to the rear of one side member, the other secured to the rear of the other side member, link locking means adapted releasably to lock a parallel motion link connecting each side member to the spine in any selected one of a number of angular relationships to the side member, said link locking means comprising a plunger within the link, and spring-loading means adapted to extend the plunger into engagement with any selected one of a series of holes in the side member to which the link is connected, bumper locking means adapted releasably to lock the bumper bar in any selected one of a number of telescopically adjusted positions, said bumper locking means comprising a pair of laterally displaced plungers within the inner telescopic member, and spring-loading means adapted to extend the plungers into engagement with any selected ones of series of holes in the outer telescopic member, and pneumatic means for simultaneously retracting the plungers of said links and said bumper bar.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |