DAMPING AND AUXILIARY PUMPING APPARATUS

摘要

A pulsating fluid pump, such as a piston-type pump, defining a fluid flow therethrough and a housing defining a cavity therein with a flexible diaphragm dividing said cavity into first and second chambers with the first chamber connected in communication with the fluid flow through the pump and the second chamber having inlet and outlet ports therein. Check valves attached to said inlet and outlet ports for allowing fluid to flow only into said inlet and only out of said outlet. A fluid reservoir in communication with said check valves and ports providing a flow of fluid in response to pulsating or oscillatory movement of the diaphragm. A restriction valve in the fluid path from said outlet port to said inlet port for providing a variable amount of restriction or damping action on the movement of the diaphragm.