Patent US3251609A successfully refreshed from Google Patents.
US3251609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tractor-trailer coupling assembly
Assignee: SANFORD DAY CORP
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Filing: 1964-07-01
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Granted: 1966-05-17
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Expires: 1984-07-01
Abstract
No abstract record available.
Inventors
- 👤 Gordon E Daniels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:08
CPC Classifications
B; B62; B62D; B62D53/00; B62D53/04; B62D53/08; B62D53/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A FIFTH WHEEL HAVING A MEDIAL SLOT OPEN AT ONE END FOR THE RECEPTION OF A KINGPIN, A PAIR OF JAWS CARRIED BY THE FIFTH WHEEL ADJACENT THE SLOT FOR RELEASABLY GRIPPING A KINGPIN BETWEEN THEM, MEANS MOUNTING ONE OF SAID JAWS FOR HORIZONTAL SWINGING MOVEMENT ABOUT A FIRST UPRIGHT AXIS AND FOR BODILY MOVEMENT LENGTHWISE OF THE SLOT, AND MEANS CONTINUOUSLY YIELDABLY URGING SAID ONE JAW LENGTHWISE OF THE SLOT TOWARD THE OPEN AND OF THE SLOT TO TEND TO MAINTAIN THE OTHER JAW IN RELEASE POSITION.
Claim 2
Dependent Claim
88 words
A FIFTH WHEEL HAVING A MEDIAL SLOT OPEN AT ONE END FOR THE RECEPTION OF A KINGPIN, A PAIR OF JAWS CARRIED BY THE FIFTH WHEEL ADJACENT THE SLOT FOR RELEASABLY GRIPPING A KINGPIN BETWEEN THEM, MEANS MOUNTING ONE OF SAID JAWS FOR HORIZONTAL SWINGING MOVEMENT ABOUT A FIRST UPRIGHT AXIS AND FOR BODILY MOVEMENT LENGTHWISE OF THE SLOT, AND MEANS CONTINUOUSLY YIELDABLY URGING SAID ONE JAW LENGTHWISE OF THE SLOT TOWARD THE OPEN AND OF THE SLOT TO TEND TO MAINTAIN THE OTHER JAW IN RELEASE 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) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |