Variable displacement hydraulic system

Details Variable displacement hydraulic system Variable displacement hydraulic system

1975-09-04

1976-12-07

Croyle, Carlton R.

Pumps

Condition responsive control of drive transmission or pump...

Having means to hold or resist movement of pumping element

417252, 417270, 417295, 60444, F04B 104, F04B 4900

Patent

active

039959732

ABSTRACT:
A variable displacement hydraulic system includes a charge system having a substantially constant charge pressure, a reciprocating piston type pump having a drive chamber in communication with the charge system, and a control valve regulating the flow of fluid from the charge system to the inlet of the reciprocating piston type pump which is manually movable from a closed fluid blocking position through a first range in which it varies and controls the quantity of fluid flowing to the pump inlet and a second range in which it varies the control of pressure of fluid flowing to the pump inlet at flow rates greater than those obtainable in the first range.

REFERENCES:
patent: 3002462 (1961-10-01), Raymond
patent: 3306211 (1967-02-01), Kunzler
patent: 3738111 (1973-06-01), Fletcher
patent: 3815478 (1974-06-01), Axelsson

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