DUAL-PISTON PUMP APPARATUS

摘要

A dual-piston pump apparatus (12) includes a pair of reciprocating sleeves (78) within which a pair of reciprocating pistons (80) are disposed. The pistons (112) and sleeves (78) are each supported on a frame (10) for independent movement along a line angled relative to horizontal by an angle less than about 45 degrees. The apparatus also includes a piston construction including a removable face (112) which permits the piston to be broken down for cleaning. Each piston (80) is normally restricted by a stop from extension beyond the end of the corresponding sleeve, but an actuator is provided for freeing the piston (80) relative to the sleeve (78) so that the piston (80) may be extended beyond the sleeve (78) and the sleeve may be withdrawn from a pump chamber of the apparatus.