US3740076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-jacknifing trailer coupling
Assignee: Individual
•
Filing: 1972-01-07
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Granted: 1973-06-19
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Expires: 1992-01-07
Abstract
Abstract Means for permitting a trailer to move forward a short distance, toward the tractor under conditions that might otherwise result in a dangerous jacknife. As the distance between the trailer and the tractor to which it is attached is closed, turn restricting members on the two units are brought into contact with each other. Jacknifing is avoided because the abutting members insure that the angle between the coupled units will remain sufficiently large to avoid buckling and a loss of road wheel traction and driver control.
Inventors
- 👤 J Cupp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:35
CPC Classifications
B; B62; B62D; B62D53/00; B62D53/04; B62D53/08; B62D53/0842; B62D53/0871
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
153 words
In combination: first and second road vehicles, said second road vehicle being a trailer hitched to said first road vehicle; a support member mounted on the rear of said first vehicle; an arcuate plate secured to the front of the second road vehicle; a king pin for hitching the second vehicle to a usual fifth wheel of a tractor or convertor; a movable connector between the king pin and the second road vehicle, which connector permits the support member and the arcuate plate to abut under conditions when said seconD vehicle is pushing against said first vehicle; and limit means coupled to the front portion of said second road vehicle in proximity with the outside extremes of said arcuate plate and cooperative with said support member for limiting the relative movement of said support member in abutment with said arcuate plate and thereby limiting the relative angle between said first and second vehicles.
Claim 2
Dependent Claim
153 words
In combination: first and second road vehicles, said second road vehicle being a trailer hitched to said first road vehicle; a support member mounted on the rear of said first vehicle; an arcuate plate secured to the front of the second road vehicle; a king pin for hitching the second vehicle to a usual fifth wheel of a tractor or convertor; a movable connector between the king pin and the second road vehicle, which connector permits the support member and the arcuate plate to abut under conditions when said seconD vehicle is pushing against said first vehicle; and limit means coupled to the front portion of said second road vehicle in proximity with the outside extremes of said arcuate plate and cooperative with said support member for limiting the relative movement of said support member in abutment with said arcuate plate and thereby limiting the relative angle between said first and second vehicles.
Claim 3
Dependent Claim
15 words
The claim according to claim 1 above wherein: support member is a vertically disposed roller.
Claim 4
Dependent Claim
29 words
The claim according to claim 2 above wherein: said limiting means comprises first and second dead stops dimensioned for receiving said roller on each side of said second vehicle.
Claim 5
Dependent Claim
16 words
The claim according to claim 1 wherein: the support member is a rail of convex configuration.
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |