Adjustable flow texture sprayer with peristaltic pump

Abstract

A texture sprayer ( 10 ) has a cart ( 12 ) containing one adjustable flow peristaltic pumps ( 14 ), a motor ( 16 )), a material supply hopper ( 18 ) and a flow control device ( 20 ). A double-ended motor shaft may be provided wherein one end drives the pump ( 14 ) and the other end drives an air compressor ( 22 ). A hose retention mechanism ( 26 ) on the pump ( 14 ), consists of a coupled hose ( 28 ), a hose retainer plate ( 30 ), a mounting plate ( 32 ) and a retainer screw ( 34 ). An adjustor ( 40 ), which is a variable force device for varying the amount of tension on the hose ( 28 ) closer or farther away from center of the rotor ( 42 ) by raising and lowering the mounting plate ( 32 ) relative to the cart ( 12 ), rotor ( 42 ) and rollers ( 44 ). In the pump ( 14 ), the distance over which the hose ( 28 ) is stretched is made or adjustable so that a variable rate of flow may be achieved.

1 . A sprayer for application of viscous materials such as texture, said sprayer comprising: 
 a frame;    a loop of tubing having first and second ends and being attached to said frame;    a motor, said motor having a shaft with a rotor attached thereto, said motor being pivotably attached to said frame to vary the distance between said shaft and said first and second tubing ends;    a plurality of rollers attached to said rotor and engaging said tubing; and    a force generator attached between said motor and said frame to vary the force with which said rollers contact said tubing.    
   
   
       2 . The sprayer for application of viscous materials of  claim 1  wherein said force generator comprises an air cylinder.  
   
   
       3 . The sprayer for application of viscous materials of  claim 2  wherein said force generator comprises a pressure regulator attached to said air cylinder.  
   
   
       4 . The sprayer for application of viscous materials of  claim 1  wherein said force generator comprises an air cylinder.  
   
   
       5 . The sprayer for application of viscous materials of  claim 1  wherein said tubing is attached at one of said ends to a source of viscous material and at the other of said ends to an application device.  
   
   
       6 . The sprayer for application of viscous materials of  claim 1  wherein said tubing has couplings at said ends and further comprising a tubing retention mechanism comprising a mounting plate; and 
 a hose retainer plate, said couplings sliding onto each end of said hose retainer plate with said couplings protruding through the surface of said mounting plate for access and said retainer plate supporting the loads imposed said rollers.    
   
   
       7 . The sprayer for application of viscous materials of  claim 6  wherein said couplings comprise a profile and said mounting plate comprises openings to match said profile of said couplings to prevent rotation said couplings when tubing is attached.