Abstract: An airless sprayer utilizing a reciprocating piston pump (12) uses a block fluid manifold (16) attached directly to the pump cylinder (14) and which includes provisions for a pressure sensor (20), a dump or safety valve (18) and a hose outlet to minimize pressure drop which in turn maximizes spraying pressure as well as lessening the tendency to pack out.

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.

Abstract: A texture sprayer is provided with a hopper feeding an air operated double diaphragm pump. The sprayer is provided with a removable power pack which includes a gas engine, an air pump, an air unloading regulator, an air cooler, an air QD and a mounting base with handles. The power pack may be removed from the sprayer cart and located outside so that the sprayer can be used quietly and safely indoors.