PUMP AND SYSTEM EMPLOYING SAID PUMP

A system for delivering controlled quantities of a stream of fluid to an application zone includes a positive displacement pump (100) comprising a piston housing (111) with an interior cylindrical wall (115). A pumping chamber (116) lies adjacent a closed end of the pump cylinder. A reciprocating an...

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Bibliographische Detailangaben
1. Verfasser:	THACKSTON, GUTHRIE ROGER
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CYLINDERS ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING METHODS OF PRODUCING PAPER THEREON PAPER-MAKING PAPER-MAKING MACHINES PISTONS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PRODUCTION OF CELLULOSE PUMPS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS SEALINGS TEXTILES THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A system for delivering controlled quantities of a stream of fluid to an application zone includes a positive displacement pump (100) comprising a piston housing (111) with an interior cylindrical wall (115). A pumping chamber (116) lies adjacent a closed end of the pump cylinder. A reciprocating and rotating piston (118) in the cylinder draws fluid into the chamber (116) and expels the fluid therefrom. A barrier fluid inlet (122) adjacent the piston (118) enables barrier fluid to be delivered to the cylinder at a pressure greater than the maximum fluid pressure in the pumping chamber (116) to preclude migration of pumping fluid along the piston to the opposite end of the cylinder.