Controller for a hydraulic motor

Details Controller for a hydraulic motor Controller for a hydraulic motor

1994-07-05

1995-11-07

Look, Edward K.

Motors: expansible chamber type

With motive fluid valve

Manual control carried on or operated from load or output...

91459, 91461, F15B 1108, F15B 1304

Patent

active

054639310

ABSTRACT:
A controller for a hydraulic motor (11) comprises a directional valve (12) for communicating hydraulic pressure fluid from a pressure source (10) to the motor (11), a pilot pressure operated activating device (13, 14), pilot valves (17, 18) connected to the activating device (13, 14) and to the pressure source (10), and a manually operable activating lever (15) mechanically connected to the directional valve (12) via a coupling (24, 55, 56). A pressure fluid operated actuator (25, 47, 48) is associated with the coupling (24, 55, 56) to shift the coupling when pressurized from an engaged condition and a disengaged condition, and a mode shifting valve (19) is connected both to the actuator (25, 47, 48) and to the pilot valves (17, 18) and is arranged to pressurize simultaneously the pilot valves (17, 18) and the actuator (25, 47, 48) of the coupling (24, 55, 56) to avoid double activation of the directional valve (12).

REFERENCES:
patent: 3589242 (1971-06-01), Peterson
patent: 3788425 (1974-01-01), Balogh
patent: 4072169 (1978-02-01), Heiser et al.
patent: 4350209 (1982-09-01), O'Connor
patent: 4644846 (1987-02-01), Kozuka

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