US3833255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined load cover and windshield protector for dump truck
Assignee: Individual
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Filing: 1973-10-29
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Granted: 1974-09-03
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Expires: 1993-10-29
Abstract
Abstract Two hinged cover plates are attached to a dump truck to provide a load cover. Power means is provided to lift the plates for loading, thus moving the plates through an upright semi-folded position, and then to a forward, full-folded horizontal position over the cab so as to cover the windshield and protect the same from rocks and other debris that might fall during loading. A spring is provided to give the plates spreading action in the intermediate vertical position and counterbalancing action in the cover position. The forward end of the first plate is pivotally mounted at the front of the body and the free end of the second plate is guided on the upper rail of the dump box during covering and uncovering. The power cylinder includes means for shifting the base to allow over-center action in both directions of movement of the covers. Tortuous path water seals are provided at the front of the box and at the middle hinge.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:31
CPC Classifications
B; B60; B60J; B60J7/00; B60J7/08; B60J7/12; B60J7/14; B60J7/141; B60J7/02; B60J7/04; B60J7/041
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
A combined load cover for truck dump box and cab windshield protector comprising first and second cover plates, hinge means for pivotally connecting said plates, said plates normally extending over said box when positioned substantially horizontally and lying in a single plane, pivot means for mounting said first plate along an edge opposite said hinge means adjacent the front of said box and power means on said box and connected to one of said plates for pivotally lifting and folding said plates for opening the top of said box and moving said plates through an upright vertical position to a forward horizontal position over the cab so as to cover the windshield.
Claim 2
Dependent Claim
112 words
A combined load cover for truck dump box and cab windshield protector comprising first and second cover plates, hinge means for pivotally connecting said plates, said plates normally extending over said box when positioned substantially horizontally and lying in a single plane, pivot means for mounting said first plate along an edge opposite said hinge means adjacent the front of said box and power means on said box and connected to one of said plates for pivotally lifting and folding said plates for opening the top of said box and moving said plates through an upright vertical position to a forward horizontal position over the cab so as to cover the windshield.
Claim 3
Dependent Claim
63 words
The combination load cover and cab windshield protector of claim 1 wherein is further provided spring means associated with said hinge means to slightly spread said plates when positioned vertically to allow opening action along the top of said box during the covering operation, the tension in said spring being insufficient to spread said plates when positioned in the horizontal cab protector position.
Claim 4
Dependent Claim
45 words
The combination load cover and cab windshield protector of claim 2 wherein said spring means is operative to provide for a force tending to counterbalance the weight of said plates by forcing the free end of said second plate against the rim of said box.
Claim 5
Dependent Claim
30 words
The combination load cover and cab windshield protector of claim 3 wherein said free end includes a curved guide shoe along each side of said box to engage said rim.
Claim 6
Dependent Claim
44 words
The combination load cover and cab windshield protector of claim 1 wherein said power means includes a fluid cylinder, means for shifting the base of said cylinder for shifting the over-center location to allow movement of said plates by said cylinder in both directions.
Claim 7
Dependent Claim
92 words
The combination load cover and cab windshield protector of claim 1 wherein said pivot means comprises a pin on each side of said box, upstanding mounting means on said box for said pins, shield means extending across the front of said box and up above said mounting means and rearwardly to form a tortuous path seal, and angle bracket means on said first plate for receiving said pin to position the leading edge below said plate in the covering position and to extend around said shield means in the windshield protecting position.
Claim 8
Dependent Claim
60 words
The combination load cover and cab windshield protector of claim 6 wherein is provided a Z member on the first plate at the edge adjacent said hinge means and cooperating angle member on the corresponding edge of said second member, the top of said Z member overlying the upstanding leg of said angle member to provide a tortuous path seal.
Claim 9
Dependent Claim
38 words
The combination load cover and cab windshield protector of claim 1 wherein the rear edge of said second plate moves along the top of said load during the covering operation to smooth the same by edge plowing action.
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |