Patent US3154786A successfully refreshed from Google Patents.
Patent US3578357A successfully refreshed from Google Patents.
US3578357A
Expired / Lapsed
US
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Fifth wheel lock assembly
Assignee: Holland USA Inc
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Filing: 1968-12-27
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Granted: 1971-05-11
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Expires: 1988-12-27
Abstract
Abstract A kingpin lock assembly for a vehicular-hauling hitch, especially the fifth-wheel type, using overlapping retention jaws giving full peripheral pin engagement, the jaws sliding laterally together in retention tracks generally transverse to the usual direction of the hauling force.
Inventors
- 👤 Clarence N Bouman
- 👤 Fred Bakker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:37
CPC Classifications
B; B62; B62D; B62D53/00; B62D53/04; B62D53/08; B62D53/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
119 words
A kingpin-locking assembly for a vehicular-hauling hitch, comprising: support means defining a generally semicircular frontal portion of a kingpin-receiving mechanism, jaws collectively defining a second semicircular portion, positioned to form the rear of said kingpin-receiving mechanism, said jaws being laterally rectilinearly shiftable from a spaced, kingpin releasing relationship, to an engaged kingpin retention relationship, said engaged jaws being retained against rearward movement so as to retain the kingpin from escape under hauling conditions; said jaws comprising a pair of members with arcuate surfaces of approximately 90* each, but each jaw having a tongue extending beyond such arcuate surfaces and overlapping when said jaws are engaged, to form an overlapping kingpin-engaging cylindrical surface area at the rear of the assembly.
Claim 2
Dependent Claim
119 words
A kingpin-locking assembly for a vehicular-hauling hitch, comprising: support means defining a generally semicircular frontal portion of a kingpin-receiving mechanism, jaws collectively defining a second semicircular portion, positioned to form the rear of said kingpin-receiving mechanism, said jaws being laterally rectilinearly shiftable from a spaced, kingpin releasing relationship, to an engaged kingpin retention relationship, said engaged jaws being retained against rearward movement so as to retain the kingpin from escape under hauling conditions; said jaws comprising a pair of members with arcuate surfaces of approximately 90* each, but each jaw having a tongue extending beyond such arcuate surfaces and overlapping when said jaws are engaged, to form an overlapping kingpin-engaging cylindrical surface area at the rear of the assembly.
Claim 3
Dependent Claim
127 words
A kingpin-locking assembly for a vehicular-hauling hitch comprising: support means defining a generally semicircular rearwardly opening frontal portion of a kingpin-receiving mechanism; a pair of slidable jaws; and slide track means retaining said jaws, oriented to enable lateral shifting of said jaws toward and into engagement with each other, and away from and out of engagement with each other; said jaws each having arcuate surfaces of approximately 90* on the inner ends thereof to cooperatively form a semicircular rear portion of the kingpin-receiving mechanism; each of said jaws having a tongue extending beyond its respective arcuate surface; and said tongues being in overlapping relationship when said jaws are engaged, with the angle between the overlap and the center of the kingpin-receiving circle being at least about 30*.
Claim 4
Dependent Claim
127 words
A kingpin-locking assembly for a vehicular-hauling hitch comprising: support means defining a generally semicircular rearwardly opening frontal portion of a kingpin-receiving mechanism; a pair of slidable jaws; and slide track means retaining said jaws, oriented to enable lateral shifting of said jaws toward and into engagement with each other, and away from and out of engagement with each other; said jaws each having arcuate surfaces of approximately 90* on the inner ends thereof to cooperatively form a semicircular rear portion of the kingpin-receiving mechanism; each of said jaws having a tongue extending beyond its respective arcuate surface; and said tongues being in overlapping relationship when said jaws are engaged, with the angle between the overlap and the center of the kingpin-receiving circle being at least about 30*.
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |