Hydraulic system

Details Hydraulic system Hydraulic system

1997-09-18

1999-01-12

Richter, Sheldon S.

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

60422, 91433, 91441, 91444, F15B 1116

Patent

active

058573313

ABSTRACT:
A hydraulic system with a pressure source controllable via a load sensing signal, a pressure sink, at least two working sections, each having a hydraulic consumer and a control valve with a load sensing signal connection and at least one back-pressure valve arranged in a tank pipe between the control valve and the pressure sink. In such a system the pressure required from the pump in the neutral position must be as low as possible. On the other hand, however, oscillations should not occur, when an external force acts on another hydraulic consumer in the neutral position of a control valve. In the neutral position of the control valves the load sensing signal connection is therefore connected with the pressure sink via an auxiliary tank pipe by-passing the back-pressure valve.

REFERENCES:
patent: 5083430 (1992-01-01), Hirata et al.
patent: 5323687 (1994-06-01), Zenker et al.
patent: 5642616 (1997-07-01), Park

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