Compressor suction valve of toroidal shape with a radial finger

Connector assembly

Cooling system for a magnetic pump

Device for supplying an apportioned minimum amount of fluid

Double-acting, two-stage pump

Down hole pump

Downstroke sucker rod pump and method of use

Downstroke sucker rod well pump

Flexible suction valve retainer

Floor pump

Flow-through vertical filling pump with a plurality of diaphragm

Fluid compressing apparatus

Fluid end for reciprocating pump

Fluid feed pump with valved piston device

Fluid pump with enhanced seal

Free piston for use in an electromagnetic reciprocating compress

Gas compressor head and discharge valve construction

Gas compressor with reciprocating piston with valve sheath

Hand operable pump

Hand pump of a drinking device for pumping water to a diver