Roll-up truck cover assembly
First Claim
1. A roll-up truck cover assembly for dump trucks and the like having upstanding side and end walls defining an upwardly open generally rectangular body for receiving particulate material which may project upwardly beyond the sides of said body;
- said cover assembly comprising a generally rectangular flexible top cover substantially co-extensive with the body cross section viewed from above, said cover having one end portion attached to one end portion of the body to close the body adjacent one end wall and prevent particulate leakage, a take-up roll for said flexible cover having an opposite end portion of the cover attached thereto substantially across its width and having associated biasing means tending to rotate the roll in a take-up operation of the cover, a pair of similar arms pivotally mounted at lower end portions externally on opposite side walls of the truck body and having upper end portions connected with and rotatably supporting opposite end portions of said take-up roll, and operating means for swinging said arms and take-up roll from said one end portion of the body toward an opposite end portion for an arcuate end-to-end take-up roll traverse of the truck body placing the cover in a body covering position, the said direction being opposite to the direction which said biasing means tend to swing said arms while urging said cover in a take-up direction about said roll, said cover during both roll-out and take-up thus having substantially no horizontal component of movement with respect to particulate material in the truck body, and a braking apparatus associated with said take-up roll and operable at said opposite end portion of the truck body to secure the take-up roll against inadvertent rotation and to thereby hold the cover taut in its body covering position, said braking apparatus comprising circumferentially toothed rotatable means operatively associated with said take-up roll and stop means for securing the rotatable means against rotation, said stop means being mounted on said truck body at its said opposite end portion and engageable with said toothed rotatable means when said take-up roll is disposed at said opposite end portion with the cover in said body covering position.
0 Assignments
0 Petitions
Accused Products
Abstract
An improved roll-up truck cover assembly for dump trucks and the like having upstanding side and end walls defining an upwardly open body for receiving particulate material. The cover assembly comprises a flexible top cover substantially coextensive with the body cross section viewed from above and one end of the cover extends across and is attached to one end portion of the body. A take-up roll for the cover has a spring bias for rotation in a take-up direction and is mounted on a pair of arms at upper end portions of the latter. Lower end portions of the arms are pivotally attached externally at sides of the truck body to swing the take-up roll through a long shallow arc in a lengthwise traverse of the truck body. With the take-up roll at an opposite end portion of the body and the cover in closed position over the upwardly exposed opening in the body, a braking apparatus secures the take-up roll against inadvertent rotation whereby to maintain the cover in a taut condition over the opening.
-
Citations
11 Claims
-
1. A roll-up truck cover assembly for dump trucks and the like having upstanding side and end walls defining an upwardly open generally rectangular body for receiving particulate material which may project upwardly beyond the sides of said body;
- said cover assembly comprising a generally rectangular flexible top cover substantially co-extensive with the body cross section viewed from above, said cover having one end portion attached to one end portion of the body to close the body adjacent one end wall and prevent particulate leakage, a take-up roll for said flexible cover having an opposite end portion of the cover attached thereto substantially across its width and having associated biasing means tending to rotate the roll in a take-up operation of the cover, a pair of similar arms pivotally mounted at lower end portions externally on opposite side walls of the truck body and having upper end portions connected with and rotatably supporting opposite end portions of said take-up roll, and operating means for swinging said arms and take-up roll from said one end portion of the body toward an opposite end portion for an arcuate end-to-end take-up roll traverse of the truck body placing the cover in a body covering position, the said direction being opposite to the direction which said biasing means tend to swing said arms while urging said cover in a take-up direction about said roll, said cover during both roll-out and take-up thus having substantially no horizontal component of movement with respect to particulate material in the truck body, and a braking apparatus associated with said take-up roll and operable at said opposite end portion of the truck body to secure the take-up roll against inadvertent rotation and to thereby hold the cover taut in its body covering position, said braking apparatus comprising circumferentially toothed rotatable means operatively associated with said take-up roll and stop means for securing the rotatable means against rotation, said stop means being mounted on said truck body at its said opposite end portion and engageable with said toothed rotatable means when said take-up roll is disposed at said opposite end portion with the cover in said body covering position.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
Specification