Truck cover and mechanism for operating same

In a truck which includes a cab, an open top body including a pair of spaced and parallel sides and spaced and parallel rear and front ends, and a source of electrical power in said truck;

• a truck body cover assembly, said assembly comprising in combination a substantially rectangular flexible cover movable between a fully extended, truck body covering position and a retracted position and any position therebetween, roller means mounted at one end of said truck body adjacent the upper side thereof, said cover being secured by one end thereof to said roller means, and adapted to be rolled upon and dispensed from said roller means, spring return means in said roller means normally urging said roller means to rotate in one direction thereby rolling said cover on said roller means as aforesaid, horizontal rail means on each side of said truck body, mounting means journalled for longitudinal horizontal movement in each of said rail means, means connecting the other end of said cover between said mounting means, means operatively connected to said mounting means whereby said cover is extendible from said roller means against pressure of said spring return means, across the open top of said truck body when said cover is in a truck body covering position and is retracted upon said roller means when in a cover storage position and an endless chain operatively connected between said mounting means upon each side of said truck body and said source of power, each of said chains including an upper run and a lower run, said upper runs being connected to said mounting means, said horizontal rail means including an upper horizontal channel and a lower horizontal channel spaced and parallel to said upper horizontal channel, said upper runs engaging through said upper horizontal channels, and sprockets mounted adjacent each end of said horizontal rail around which said chains extend.