US3724697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Truck having a vertically displaceable carrying frame
Assignee: Individual
•
Filing: 1971-06-01
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Granted: 1973-04-03
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Expires: 1991-06-01
Abstract
Abstract An arrangement in loading trucks having a support frame which is movable relatively the truck chassis, and a detachable loading platform supported on said frame. The invention comprises traction means by means of which the support frame is connected to the truck chassis in such a way that the springs of the rear axle are compressed at the raising of the support frame, resulting in levelling of the truck chassis at the rear, and also locking means ensuring that the compression is retained independently of the movements of the support frame, and means for releasing such locking when the support frame is in an upper position.
Inventors
- 👤 C Arvidsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:24
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/64; B60P1/6418; B60P1/6427; B60P1/02; B60P1/025
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
An improvement in loading trucks of the type having a support frame, a truck chassis, means for supporting said support frame for vertical movement relative to said truck chassis, a detachable loading platform adapted to be supported by said support frame, a rear axle, and spring means for suspending said chassis from said rear axle, the improvement comprising traction means operatively connected to said support frame and to said rear axle for compressing said spring means upon the raising of said support frame, and locking means for locking said rear axle to said truck chassis after compression of said spring means for retaining said spring means under compression regardless of the position of said support frame.
Claim 2
Dependent Claim
116 words
An improvement in loading trucks of the type having a support frame, a truck chassis, means for supporting said support frame for vertical movement relative to said truck chassis, a detachable loading platform adapted to be supported by said support frame, a rear axle, and spring means for suspending said chassis from said rear axle, the improvement comprising traction means operatively connected to said support frame and to said rear axle for compressing said spring means upon the raising of said support frame, and locking means for locking said rear axle to said truck chassis after compression of said spring means for retaining said spring means under compression regardless of the position of said support frame.
Claim 3
Dependent Claim
68 words
An improvement in accordance with claim 1, wherein the traction means comprises flexible means, and vertical rods fixed at the rear axle, one end of said flexible means being attached to said support frame and the opposite end of said flexible means being attached to the upper end of said vertical rods, the locking means comprising locking arms and a blocking abutment for cooperation with said locking arms.
Claim 4
Dependent Claim
28 words
An improvement in accordance with claim 2, wherein the locking arms are arranged for insertion beneath its respective blocking abutment to lock said springs in a compressed condition.
Claim 5
Dependent Claim
56 words
An improvement in accordance with claim 3, wherein the locking means further comprises a yoke interconnected to one end of said locking arms so as to permit displacement of said locking arms in parallel backwards and forwards movement on the truck chassis, a hydraulically operated piston and cylinder unit being provided to effect such parallel displacement.
Claim 6
Dependent Claim
83 words
An improvement in accordance with claim 2, comprising a nut or a head arranged at the upper end of said rods and connected to the respective chain or the like, the lower face of said nut or head forming said blocking abutment, the locking arms being of fork-like configuration at the locking end thereof with the legs of the fork clamping its respective rod so as to enclose it on either side beneath said blocking abutment when the device is in locking position.
References Cited (Backward Citations)
US2780876A
Cited
US3501165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |