US3722919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-jackknife device
Assignee: Individual
•
Filing: 1971-12-07
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Granted: 1973-03-27
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Expires: 1991-12-07
Abstract
Abstract The present invention is directed to a braking device separate from the wheel brakes of the vehicle which may be mounted either on the tractor or the trailer and which is subjected to the actuating fluid when the vehicle wheel brakes are applied and which locks with a cable drum and cable when the free end of the cable is connected to the unit of the tractor - trailer that a brake device is not connected to which will arrest the horizontal swing of the trailer relative to the tractor before attaining the point of no return at which jackknife results.
Inventors
- 👤 F Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:57
CPC Classifications
B; B62; B62D; B62D53/00; B62D53/04; B62D53/08; B62D53/0871; B62D53/0878; B60; B60T; B60T1/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
223 words
For use with a tractor trailer rig an anti-jackknife device comprising an axle mounted on one of the elements of said rig a. a brake stator secured to the free end of said axle and having braking elements thereon, b. a complemental braking means carried for free rotation on said axle and positioned to be engaged by said braking elements, c. a cable drum assembly rotatable mounted on said axle, d. ratchet and pawl means one element of which is carried by said complemental braking means and the other element of which is carried by said cable drum assembly for locking said cable drum assembly with said complemental braking means upon rotation in one direction and permitting overrunning rotation between said cable drum assembly and said complemental braking means in the other direction, e. cable means one end of which is secured to said cable drum assembly, f. pivotally mounted yieldable means mounted on the other element of said rig, g. means for connecting the free end of said cable to said pivotally mounted yieldable means, and h. spring means one end of which is secured to the element of said rig upon which the axle is mounted and the other end of which is secured to said cable drum assembly to maintain the cable between the two elements of the rig taut.
Claim 2
Dependent Claim
223 words
For use with a tractor trailer rig an anti-jackknife device comprising an axle mounted on one of the elements of said rig a. a brake stator secured to the free end of said axle and having braking elements thereon, b. a complemental braking means carried for free rotation on said axle and positioned to be engaged by said braking elements, c. a cable drum assembly rotatable mounted on said axle, d. ratchet and pawl means one element of which is carried by said complemental braking means and the other element of which is carried by said cable drum assembly for locking said cable drum assembly with said complemental braking means upon rotation in one direction and permitting overrunning rotation between said cable drum assembly and said complemental braking means in the other direction, e. cable means one end of which is secured to said cable drum assembly, f. pivotally mounted yieldable means mounted on the other element of said rig, g. means for connecting the free end of said cable to said pivotally mounted yieldable means, and h. spring means one end of which is secured to the element of said rig upon which the axle is mounted and the other end of which is secured to said cable drum assembly to maintain the cable between the two elements of the rig taut.
Claim 3
Dependent Claim
28 words
An anti-jackknife device as claimed in claim 1 wherein said axle upon which the braking means and cable drum assembly are mounted is mounted with its axis vertical.
Claim 4
Dependent Claim
28 words
An anti-jackknife device as claimed in claim 1 wherein said axle is carried by the trailer rearwardly of its fifth wheel connection and depends vertically from the trailer.
Claim 5
Dependent Claim
27 words
An anti-jackknife device as claimed in claim 1 wherein the braking elements on said brake stator are adapted to be connected to the tractor braking fluid system.
Claim 6
Dependent Claim
32 words
An anti-jackknife device as claimed in claim 1 wherein the braking elements on said stator are brake shoes which engage the inside of the complemental braking means which is a brake drum.
Claim 7
Dependent Claim
45 words
An anti-jackknife device as claimed in claim 1 wherein said ratchet and pawl means comprises a sloped wall toothed ring secured to the complemental braking means for rotation therewith and the pawl means is a spring loaded pivotally mounted pawl on the cable drum assembly.
Claim 8
Dependent Claim
30 words
An anti-jackknife device as claimed in claim 1 wherein said pivotally mounted yieldable means is mounted on the rear of the tractor unit for pivoting movement in a horizontal plane.
Claim 9
Dependent Claim
39 words
An anti-jackknife device as claimed in claim 1 wherein said spring means is a flat volute spring one end of which is secured to the axle and the other end of which is secured to said cable drum assembly.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |