Arrangement for controlling a hydraulic motor

Details Arrangement for controlling a hydraulic motor Arrangement for controlling a hydraulic motor

1982-09-30

1985-07-30

Garrett, Robert E.

Motors: expansible chamber type

With motive fluid valve

Contracting chamber exhaust valve controlled by expanding...

91461, F15B 13042

Patent

active

045314497

ABSTRACT:
An arrangement for controlling a hydraulic motor having supply and discharge sides, has a throttling directional valve having supply and discharge sides and a port, a speed lowering brake valve controlling the discharge side of the hydraulic motor and having a control piston with a control side and a port connected with said port of said directional valve, a control valve arrangement between the control side of the control piston and the supply side of the hydraulic motor and having end sides with end side ports, the control valve having a control slider which selectively connects the control side of the control piston with the supply side of the hydraulic motor and disconnects the control side of the control piston from the latter, is constantly connected at the end side ports with the discharge side of the hydraulic motor prior or after the directional valve and connects the discharge side of the hydraulic motor after the directional valve with the control side of the control piston or disconnect the discharge side of the hydraulic motor from the latter, the control valve also having a control spring acting upon the control slider in a direction corresponding to a direction in which a pressure medium acts upon the discharge side of the hydraulic motor after the directional valve.

REFERENCES:
patent: 4232588 (1980-11-01), Ziplies et al.
patent: 4244275 (1981-01-01), Smilges

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