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1. (WO2010117486) HIGH PRESSURE VARIABLE DISPLACEMENT PISTON PUMP

Pub. No.:    WO/2010/117486    International Application No.:    PCT/US2010/023570
Publication Date: Fri Oct 15 01:59:59 CEST 2010 International Filing Date: Wed Feb 10 00:59:59 CET 2010
IPC: F04B 49/12
F04B 1/29
F04B 1/14
Applicants: GENERAL ELECTRIC COMPANY
HUTTO, Jr., Walter, Decania
Inventors: HUTTO, Jr., Walter, Decania
Title: HIGH PRESSURE VARIABLE DISPLACEMENT PISTON PUMP
Abstract:
A variable flow pump includes: a housing with inlet and outlet chambers interconnected by a main bore and a non-rotating cylinder block positioned in the main bore. The cylinder block includes: a central bore communicating with the inlet chamber; cylinder bores arrayed around the central bore; first feed passages interconnecting the inlet chamber and the cylinder bores, defining a bypass flowpath between the cylinder bores; and at least one discharge valve disposed at the second end which permits fluid flow from the cylinder bores to the discharge chamber but prevents opposite flow; Pistons are disposed in the bores. A shaft is coupled to the pistons so as to cause them to reciprocate through an axial pump stroke when the shaft is rotated. A mechanism is coupled to the cylinder block which modulates the axial position of the cylinder block within the housing, varying the size of the bypass flowpath.