Reciprocating pump
OwnerPaul Hammelmanninventor
Life of this patent
Estimating the term…
Abstract
A reciprocating pump wherein the plunger is surrounded by a sleeve which has limited freedom of axial movement in the pump body and has a conical end portion adjacent to the lightweight washer-like or hollow frustoconical valving element of a suction valve. When the plunger performs a suction stroke, pressure in the sleeve drops below the pressure at the inlet of the pump body whereby the suction valve opens and allows fluid to flow into the sleeve. The plunger thereupon performs a forward stroke to pressurize the fluid in the sleeve, whereby the suction valve closes, and to expel pressurized fluid through the central opening of the valving element and through a delivery valve which admits pressurized fluid into a plenum chamber.
Claims12
A reciprocating pump, comprising a housing having at least one fluid-admitting inlet;
- a tubular member mounted in said housing and including a hollow conical end portion;
- a plunger reciprocable in said tubular member;
- a lightweight suction valve having a mobile valving element installed in said housing intermediate said inlet and said conical end portion to normally seal said inlet from the interior of said tubular member, said valving element having an opening for the flow of fluid from said tubular member and being movable to an open position in which said valve defines a path for the flow of fluid from said inlet into said tubular member, said housing including a hollow conical portion constituting an extension of said conical end portion and being disposed between said tubular member and said valving element;
- a delivery valve installed in said housing downstream of said suction valve and arranged to open in response to flow of fluid from said tubular member via said opening;
- and means for alternately moving said plunger in a first direction away from said conical end portion to thereby reduce the pressure in the interior of said tubular member with attendant movement of said valving element to open position and the resulting flow of fluid from said inlet into said tubular member by way of said path, and in a second direction toward said conical end portion to thereby pressurize the fluid in said tubular member and to expel the pressurized fluid via said opening and said delivery valve.
Dependencies are inferred from the claim text.