Hydraulic control apparatus for a plurality of users

Details Hydraulic control apparatus for a plurality of users Hydraulic control apparatus for a plurality of users

1993-04-02

1996-06-25

Lopez, F. Daniel

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

60445, F16D 3102

Patent

active

055289118

ABSTRACT:
The present invention provides for a control apparatus for independently operating at least two users. The users can be the tilt cylinders and the lift cylinders of a loader. The control apparatus provides for the adjustment of the control valves and for the adjustment of the pressure control apparatus of the variable displacement pump means in dependency of each other. In accordance with the invention, the control position of the control spool of the control valve controlling the user with the largest load provides for a measure (or for the adjustment) of the pressure control device of the variable displacement pump. In this manner an extremely effective and economic operation of the hydraulic system comprising the control apparatus and the users is obtained.

REFERENCES:
patent: 5046309 (1991-09-01), Yoshino
patent: 5295795 (1994-03-01), Yasuda et al.

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