Hydraulic system having at least one hydraulic valve for...

Details Hydraulic system having at least one hydraulic valve for... Hydraulic system having at least one hydraulic valve for...

2008-04-01

2008-04-01

Leslie, Michael (Department: 3745)

Power plants

Pressure fluid source and motor

Input pump and rotary output motor system having...

C091S461000

Reexamination Certificate

active

11303874

ABSTRACT:
A hydraulic system having at least one hydraulic valve for controlling a transmission, in particular a continuously variable transmission. The hydraulic valve is controlled by a pilot circuit including at least one control element having a variable flow resistance and one control element having a constant flow resistance. The control element having a variable flow resistance is connected upstream of the control element having a constant flow resistance.

REFERENCES:
patent: 4316486 (1982-02-01), Tandrup et al.
patent: 4372193 (1983-02-01), Hall
patent: 5419130 (1995-05-01), Ruckgauer et al.

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