Patent US3881748A successfully refreshed from Google Patents.
US3881748A
Expired / Lapsed
US
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Anti load stripping attachment for logging truck-trailer combinations
Assignee: Individual
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Filing: 1973-07-26
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Granted: 1975-05-06
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Expires: 1993-07-26
Abstract
Abstract An attachment for logging truck-trailer combinations acts to prevent separation of the truck and trailer, and hence stripping of the load therefrom, under highway upgrade or mire conditions. The attachment comprises an elongated friction plate and a clamp positioned for releasable frictional engagement with the friction plate. A first connector connects the clamp to either the truck or the trailer reach. A second connector connects the friction plate to the other of the truck or trailer reach. Accordingly, under conditions tending to cause separation of the truck and trailer, the operator can apply the clamp sufficiently to prevent such separation.
Inventors
- 👤 Jack D Donaldson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:52
CPC Classifications
B; B62; B62D; B62D53/00; B62D53/04; B62D53/08; B62D53/0871; B60; B60P; B60P3/00; B60P3/40
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
130 words
In an anti-load stripping logging truck-trailer unit, the combination of: a. a truck frame, b. a hollow trailer reach, c. a compensator shaft mounted for longitudinal sliding movement in the trailer reach, d. releasable compensator shaft lock means engaging the compensator shaft for releasably locking it against longitudinal sliding movement, e. latch means releasably interconnecting the truck frame and compensator shaft, f. elongated friction plate means, g. friction plate mounting means mounting the friction plate means on the truck frame, longitudinally thereof, h. friction clamp means mounted on the truck frame for releasable frictional clamping engagement with the friction plate means, i. clamp means control means connected to the clamp means and operable from a remote station, and j. link means linking the friction plate means to the trailer reach.
Claim 2
Dependent Claim
130 words
In an anti-load stripping logging truck-trailer unit, the combination of: a. a truck frame, b. a hollow trailer reach, c. a compensator shaft mounted for longitudinal sliding movement in the trailer reach, d. releasable compensator shaft lock means engaging the compensator shaft for releasably locking it against longitudinal sliding movement, e. latch means releasably interconnecting the truck frame and compensator shaft, f. elongated friction plate means, g. friction plate mounting means mounting the friction plate means on the truck frame, longitudinally thereof, h. friction clamp means mounted on the truck frame for releasable frictional clamping engagement with the friction plate means, i. clamp means control means connected to the clamp means and operable from a remote station, and j. link means linking the friction plate means to the trailer reach.
Claim 3
Dependent Claim
79 words
The combination of claim 1 wherein the friction clamp means comprises a pair of compressed air actuated, resilient diaphragm mounted plungers positioned one on each side of the friction plate means in bearing engagement therewith, wherein the clamp means control means comprises electrically operated valve means arranged for valving compressed air to the plungers, and wherein the link means comprises cable means interconnecting the rearward end of the friction plate means and the forward end of the trailer reach.
Claim 4
Dependent Claim
142 words
In an anti-load stripping logging truck-trailer unit the combination of: a. a truck frame, b. a hollow trailer reach, c. a compensator shaft mounted for longitudinal sliding movement in the trailer reach, d. releasable compensator shaft lock means engaging the compensator shaft for releasably locking it against longitudinal sliding movement, e. latch means releasably interconnecting the truck frame and the compensator shaft, f. a case mounted entirely within the forward end of the trailer reach and receiving the compensator shaft, g. securing means securing the case to the trailer reach, h. elongated friction plate means attached to the compensator shaft as a rearward longitudinal extension thereof, i. friction clamp means mounted in the case and positioned for releasable frictional clamping engagement with the friction plate means, and j. clamp control means connected to the clamp means and operable from a remote station.
Claim 5
Dependent Claim
142 words
In an anti-load stripping logging truck-trailer unit the combination of: a. a truck frame, b. a hollow trailer reach, c. a compensator shaft mounted for longitudinal sliding movement in the trailer reach, d. releasable compensator shaft lock means engaging the compensator shaft for releasably locking it against longitudinal sliding movement, e. latch means releasably interconnecting the truck frame and the compensator shaft, f. a case mounted entirely within the forward end of the trailer reach and receiving the compensator shaft, g. securing means securing the case to the trailer reach, h. elongated friction plate means attached to the compensator shaft as a rearward longitudinal extension thereof, i. friction clamp means mounted in the case and positioned for releasable frictional clamping engagement with the friction plate means, and j. clamp control means connected to the clamp means and operable from a remote station.
Claim 6
Dependent Claim
48 words
The combination of claim 3 wherien the friction clamp means comprises at least one fluid operated cylinder having a friction head in bearing engagement with the friction plate means and wherein the clamp means control means comprises electrically operated fluid control valve means for the fluid operated cylinder.
References Cited (Backward Citations)
US1700532A
Cited
US2614864A
Cited
US2716560A
Cited
US2984319A
Cited
US3140881A
Cited
US3232636A
Cited
US3521908A
Cited
US3591200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |