Hydraulic piston pump with a balance valve

Details Hydraulic piston pump with a balance valve Hydraulic piston pump with a balance valve

2006-02-08

2011-11-01

Kramer, Devon C (Department: 3746)

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

Three or more cylinders arranged in parallel, radial or...

C417S269000, C417S540000, C091S499000

Reexamination Certificate

active

08047120

ABSTRACT:
In a hydraulic piston pump, a cylinder port can communicate with a discharge port after a system pressure and a chamber pressure in a cylinder bore becomes in an equilibrium condition. A through hole opening to a surface on which a cylinder block slides in a valve plate is allowed to communicate with a side of one end surface of a balance valve, and the system pressure of a discharge port side is supplied to the other end surface of the balance valve. In the balance valve, a balance piston which slides by a pressure difference between the chamber pressure of the cylinder bore and the system pressure is accommodated. Before the cylinder port communicates with an oil guiding groove, the chamber pressure can be equilibrated to the system pressure by an activation of the balance piston.

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Machine Translation of JP10115282A.
Machine Translation of JP4111575U.
Human English Translation of JP55152369U.
Exner et al., “Mannesmann Rexroth Hydraulik Trainer 1, 2”, Edition, 1991, vol. 1, pp. 140-141.

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