US4056283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Truck construction
Assignee: London Machinery Co Ltd
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Filing: 1977-01-25
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Granted: 1977-11-01
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Expires: 1997-01-25
Abstract
Abstract This invention provides a construction for a load-carrying vehicle which permits a dump box to dump either to the rear or to the front. The construction includes a fixed pivot for the dumping box at the rear of the frame, and a displaceable pivot for the box at the forward end of the frame. The frame contains fork means adapted selectively to engage either pivot. Locking means are provided for locking one or the other of the fork means with respect to the associated pivot. A connecting link is provided having one end pivoted at the fixed pivot and the other end pivoted to the dumping box at an intermediate location thereof. A power means such as an hydraulic cylinder is connected between a first location on the frame lying between the pivots and a second location on the box lying between the two fork means. The displaceable pivot is adapted to slide longitudinally with respect to the frame.
Inventors
- 👤 Robert Marvin Pow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:15
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/04; B60P1/16; B60P1/167
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
187 words
In a load-carrying vehicle, a construction which comprises: a load-supporting frame having a front and a rear, a dumping box above the frame also having a front and a rear, a fixed pivot at the rear of the frame, and first engagement means on the rear of the box for engaging the fixed pivot, first locking means for selectively engaging or releasing said first engagement means with respect to the fixed pivot, connecting link means having one end pivoted at said fixed pivot and the other end pivoted to the dumping box at an intermediate location therealong, a displaceable pivot at the front of the frame, and second engagement means on the front of the box for engaging the displaceable pivot, second locking means for selectively engaging or releasing said second engagement means with respect to the displaceable pivot, and a power means connected between a first location on the frame which lies between said pivots, and a second location on the box which lies between said first and second engagement means, the power means being capable of extending or contracting the distance between its connection locations.
Claim 2
Dependent Claim
187 words
In a load-carrying vehicle, a construction which comprises: a load-supporting frame having a front and a rear, a dumping box above the frame also having a front and a rear, a fixed pivot at the rear of the frame, and first engagement means on the rear of the box for engaging the fixed pivot, first locking means for selectively engaging or releasing said first engagement means with respect to the fixed pivot, connecting link means having one end pivoted at said fixed pivot and the other end pivoted to the dumping box at an intermediate location therealong, a displaceable pivot at the front of the frame, and second engagement means on the front of the box for engaging the displaceable pivot, second locking means for selectively engaging or releasing said second engagement means with respect to the displaceable pivot, and a power means connected between a first location on the frame which lies between said pivots, and a second location on the box which lies between said first and second engagement means, the power means being capable of extending or contracting the distance between its connection locations.
Claim 3
Dependent Claim
14 words
The invention claimed in claim 1, in which the power meansis a hydraulic cylinder.
Claim 4
Dependent Claim
52 words
The invention claimed in claim 1, in which both engagement means are constituted by downwardly opening forks which register with horizontal cylindrical members constituting the respective pivots, the said locking means including engagement means including pivotally mounted hook members adapted to cooperate with the respective forks to entrap the respective cylindrical members.
Claim 5
Dependent Claim
29 words
The invention claimed in claim 3, in which the power means is a telescoping hydraulic cylinder, and in which further hydraulic means are provided for controlling the hook members.
Claim 6
Dependent Claim
36 words
The invention claimed in claim 4, in which resilient retention means are provided for retaining the displaceable pivot at the forward end of its displacement range when the corresponding second locking means are not engaged therewith.
Claim 7
Dependent Claim
99 words
The invention claimed in claim 5, in which the said hook members are pivotally mounted to the dumping box at a location generally above the position of the respective pivot when the same is engaged by the respective downwardly opening forks, the hook members being adapted to swing between a first position in which a portion of the hook member extends under the respective pivot and prevents disengagement of the pivot from the respective engagement means, and a second position in which said part of the hook member is withdrawn from its restraining position with respect to the pivot.
Claim 8
Dependent Claim
59 words
The invention claimed in claim 6, in which the dumping box is provided with an opening one one side of its forward end through which it contents may pass, and in which the load-supporting frame has a hopper and sand-thrower affixed to it in a position for receiving the contents of the dumping box passing through the said opening.
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) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |