Automatic truck covering assembly

Abstract

A covering assembly for covering an open container of a vehicle is characterized by the provision that the electric circuit controlling the movement of the cover is automatically opened when the cover reaches either the fully covered position or the fully uncovered position. The assembly includes a flexible cover attached at one end of the container body by a cover spool for retraction and extension of the cover over the open container body. The cover spool is spring biased tending to uncover the open container. A bail assembly is pivotally mounted with a cover support section connected to the second end of the cover and is spring biased so as to extend the cover over the open container. A motor assembly rotates the spool and is controlled by an electric circuit that is automatically opened when the cover reaches either the fully covered position or the fully uncovered position. The motor assembly includes: a shaft locking mechanism to prevent the cover spool from back driving the motor, a clutch for decoupling the motor for operative torques above a particular value, and a disconnection mechanism for allowing the ease of rotation of the cover spool when the motor assembly is not powered. In an alternative embodiment, the second end of the cover is attached to a pair of cables on each side of the container extending around front and rear pulley wheels mounted on the front and back of the container. The front pulley wheels are attached to a shaft rotatably coupled to a motor assembly. The motor assembly rotates the shaft and moves the second end of the cover between the fully covered position and the fully uncovered position. The motor assembly is controlled by an electric circuit that is automatically opened when the cover reaches either the fully covered position or the fully uncovered position.

1 . A covering assembly for covering an open-topped vehicle container body having front, rear, and opposite side walls with upper edges, said covering assembly comprising: 
 (a) a flexible tarp cover having first and second ends and being of a size to substantially cover the open container body;    (b) a cover spool proximate the upper edge of one wall and rotatably connected with said open container, said spool receiving the first end of said cover and being attached thereto substantially across said spool width, said spool having associated biasing means tending to rotate said spool so as to wind said cover onto said spool and uncover said open container;    (c) a bail assembly for extending said cover over said open container, said bail assembly comprising a pair of spaced generally parallel legs pivotally mounted at one end at each side of said open container, a cover support section connecting second ends of said legs, means for connecting said cover support section to the second end of said cover, and bias means for biasing said cover support section in the direction so as to extend said cover over said open container;    (d) means to rotate said spool in opposite directions, with movement in a first direction serving to wind said cover onto the said spool and uncover said open container, movement in a second direction serving to unwind said cover and cover said open container.    
   
   
       2 . The assembly of  claim 1 , wherein the means to rotate said spool is a reversible motor operatively connected to said spool for causing rotation in both directions thereof, said motor being actuated by an electric circuit, the electric circuit being actuated by a switch positioned for manual actuation by a vehicle operator.  
   
   
       3 . The assembly of  claim 2 , further comprising automatic shutoff means for automatically breaking said electric circuit when the second end of said cover approaches the position wherein said open container is covered.  
   
   
       4 . The assembly of  claim 3 , further comprising means for automatically breaking said electric circuit when the second end of said cover approaches the position wherein said open container is uncovered.  
   
   
       5 . The assembly of  claim 2 , wherein at least one limit switch mounted and connected to said electric circuit for stopping said spool from rotating when the second end of said cover approaches the position wherein said open container is covered.  
   
   
       6 . The assembly of  claim 2 , further comprising: 
 (a) a control means for controlling said electric circuit to rotate said spool;    (b) at least one limit switch mounted and connected to the control means for stopping the spool from rotating when the second end of said cover approaches the position whereas said open container is covered;    (c) a limit member separate from the spool, cover and bail assembly for engagement the limit switch;    (d) means continuously connected to said motor and separate from said spool for driving the limit member and engaging the limit switch when second end of said cover has reached the position whereas said open container is covered.    
   
   
       7 . The system of  claim 2  further comprising of a method for programmably moving the second end of said cover to a predetermined position comprising: 
 (a) a powered actuator means communicating with said motor for rotating said spool and moving second end of said cover;    (b) sensing whether second end of said cover is in a predetermined position,    (c) actuating said motor in response to said actuator means if second end of said cover is other than in said predetermined position to second end of said cover into said predetermined position;    (d) deactuating said motor when second end of said cover arrives at said predetermined position.    
   
   
       8 . The system of  claim 7  wherein the predetermined position is the position whereas said open container is covered.  
   
   
       9 . The assembly of  claim 2 , further comprising: 
 (a) a means for mechanically limiting the rotation of the spool to a predetermined number of rotations;    (b) a means for automatically breaking said electric circuit when said motor has rotated said spool the predetermined number of rotations;    (c) said predetermined number of rotation is spool rotations necessary to allow the second end of said cover to travel from the uncovered position to the covered position.    
   
   
       10 . The assembly of  claim 2 , further comprising means for automatically stopping the rotation of said spool when the second end of said cover approaches the position whereas said open container is covered.  
   
   
       11 . The assembly of  claim 1 , wherein means to rotate said spool is a hand crank operatively connected to said spool for causing rotation in both directions thereof;  
   
   
       12 . The assembly of  claim 1 , wherein means to rotate said spool is a pneumatic activator or a hydraulic activator operatively connected to said spool for causing rotation in both directions thereof.  
   
   
       13 . A covering assembly for covering an open-topped vehicle container body having front, rear, and opposite side walls with upper edges, said covering assembly comprising: 
 (a) a flexible tarp cover having first and second ends and of a size to substantially cover the open container body;    (b) a cover spool proximate upper edge of one wall and rotatably connected with said open container, said spool for receiving first end of said cover attached thereto substantially across said spool width, and said spool having associated biasing means tending to rotate said spool so as to wind said cover onto said spool and uncover said open container;    (c) a bail assembly for extending said cover over said open container, said bail assembly comprising a pair of spaced generally parallel legs pivotally mounted one at each side of said open container, a cover support section connecting said legs, means for connecting said cover support section to second end of said cover, and bias means for biasing said cover support section in the direction so as to extend said cover over said open container;    (d) means to rotate said bail assembly, whereas in the first direction to wind said cover onto the said spool and uncover said open container, whereas in the second direction to unwind said cover and cover said open container;    (e) said means to rotate bail assembly is a pneumatic cylinder or a hydraulic cylinder mounted to said container body and operatively connected with said bail assembly.    
   
   
       14 . A covering assembly for covering an open-topped vehicle container body having front, rear, and opposite side walls with upper edges, said covering assembly comprising: 
 (a) a flexible tarp having first and second ends;    (b) a cover spool proximate upper edge of one wall and rotatably connected with said open container, said spool for receiving first end of said cover attached thereto substantially across said spool width    (c) a bail assembly for extending said cover over said open container, said bail assembly comprising a pair of spaced generally parallel legs pivotally mounted one at each side of said open container, a cover support section connecting said legs, means for connecting said cover support section to second end of said cover, and bias means for biasing said cover support section in the direction so as to extend said cover over said open container;    (d) a reversible electric motor operatively connected to said spool for causing rotation in both direction, whereas in the first direction to wind said cover onto the said spool and uncover said open container, whereas in the second direction to unwind said cover and uncover said open container, said motor is actuated by an electric circuit;    (e) means for automatically breaking said electric circuit when the second end of said cover approaches the position whereas said open container is covered.    
   
   
       15 . The assembly of  claim 14 , further comprising means for automatically breaking said electric circuit when the second end of said cover approaches the position whereas said open container is uncovered.  
   
   
       16 . The assembly of  claim 14 , wherein at least one limit switch is mounted and connected to said electric circuit for stopping said spool from rotating when the second end of said cover approaches the position whereas said open container is covered.