Patent ID: 6164936
Filing Date: 2000-12-26
Classification: F04B,Y10T

Abstract:
A vertical reciprocating pump for raising fluids from a fluid table, comprising:a pump outlet;a raising tube interconnecting said pump outlet and the fluid table, said raising tube having two ends;a base valve on one said end of said raising tube;a reciprocable rod supporting a piston, said piston comprising:an upper hub and a lower hub, said lower hub located below said upper hub, an outer ring connected by a plurality of branch members to said upper hub, said upper and lower hubs each connected for reciprocating movement with said rod, said outer ring connected to said lower hub by a plurality of angled leg members, said piston and said raising tube contacting one another at a plurality of points of contact, said points of contact disposed substantially in a plane;a control connected to said rod for controlling reciprocating movement of said rod; anda piston valve disposed above said outer ring, said branch members and said upper hub.