Patent US3924909A successfully refreshed from Google Patents.
US3924909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fifth wheel
Assignee: Amsted Industries Inc
•
Filing: 1975-01-20
•
Granted: 1975-12-09
•
Expires: 1995-01-20
Abstract
Abstract A cover plate adapted to fit over the upper surface of a fifth wheel and substantially conform to the shape of the fifth wheel. Interposed between the upper surface of the fifth wheel and the lower surface of the cover plate is a low friction material. The cover plate and low friction material are allowed to rotate about the king pin center through an angle of approximately 5* each side of center. When turns are negotiated which require greater than 5* of rotation the trailer pivoting continues between the upper surface of the cover plate and the trailer bed plate; minimal or no lubrication is required between this interface. A pivot center is provided to attach the cover plate to the fifth wheel and hold it secure when a trailer is not attached.
Inventors
- 👤 John Allen Kent
- 👤 Robert B Love
- 👤 Harold Louis Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:08
CPC Classifications
B; B62; B62D; B62D53/00; B62D53/04; B62D53/08; B62D53/0885
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
45 words
In combination, a fifth wheel for a trailer truck having a fifth wheel plate, a liner of low friction material riding on the fifth wheel plate, and a cover plate assembled over said liner, said cover plate being pivotally mounted on said fifth wheel plate.
Claim 2
Dependent Claim
45 words
In combination, a fifth wheel for a trailer truck having a fifth wheel plate, a liner of low friction material riding on the fifth wheel plate, and a cover plate assembled over said liner, said cover plate being pivotally mounted on said fifth wheel plate.
Claim 3
Dependent Claim
23 words
The combination according to claim 1 wherein stop means are provided limiting the rotational movement of said pivotally mounted liner and cover plate.
Claim 4
Dependent Claim
26 words
The combination according to claim 2 wherein said stops are positioned to limit the rotational movement of said cover plate to about 5* from centered position.
Claim 5
Dependent Claim
89 words
In combination: a fifth wheel for a trailer truck including a fifth wheel plate having a flat load bearing surface and rearwardly extending fingers together defining a forwardly converging tapered guideway connecting into a king pin receiver; a liner of low friction material pivotally riding on said load bearing surface; a cover plate assembled on said liner substantially conforming to the shape of said fifth wheel plate and including rearwardly extending finger portions; and stop means operatively associated with one of said plates limiting the relative rotatIonal movement thereof.
Claim 6
Dependent Claim
89 words
In combination: a fifth wheel for a trailer truck including a fifth wheel plate having a flat load bearing surface and rearwardly extending fingers together defining a forwardly converging tapered guideway connecting into a king pin receiver; a liner of low friction material pivotally riding on said load bearing surface; a cover plate assembled on said liner substantially conforming to the shape of said fifth wheel plate and including rearwardly extending finger portions; and stop means operatively associated with one of said plates limiting the relative rotatIonal movement thereof.
Claim 7
Dependent Claim
35 words
The combination according to claim 4 wherein said stop means comprise downwardly extending flanges on at least the finger portions of said cover plate positioned to stop against the fingers of said fifth wheel plate.
Claim 8
Dependent Claim
26 words
The combination according to claim 5 wherein said finger portions are positioned to limit the rotational movement of said cover to about 5* from centered position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |