Control logic for a multiple use hydraulic system

Details Control logic for a multiple use hydraulic system Control logic for a multiple use hydraulic system

1996-02-29

1997-05-06

Nguyen, Hoang

Motors: expansible chamber type

Plural relatively movable or rigidly interconnected working...

Separate valve means actuatable by a common nonmanual...

91461, 91459, F15B 1100

Patent

active

056260709

ABSTRACT:
A control logic for a multiple use hydraulic system includes a selector switch having a first position connecting a battery to a treadle switch operable to energize a solenoid pilot valve for communicating pilot fluid to an end of a first directional control valve. The selector switch has another position connecting the battery to a bi-directional push button switch operable to selectively energize a pair of solenoids of a second pilot valve. Energizing one of the solenoids moves the second pilot valve in one direction to communicate pilot fluid to an end of the first and a second control valve. Energizing the other solenoid moves the second pilot valve in the opposite direction to communicate pilot fluid to the other end of the control valves. The selector switch has a third position connecting the battery to a pair of pressure switches connected to a pair of lines connecting a manually actuated pilot valve to a pair of solenoid blocker valves. Fluid pressure in either line will energize both blocker valves so that the manually actuated valve controls flow of pilot fluid to and from the opposite ends of the first control valve.

REFERENCES:
patent: 4133251 (1979-01-01), Agge et al.
patent: 5014596 (1991-05-01), St. Martin
patent: 5081905 (1992-01-01), Yagyu et al.
patent: 5102102 (1992-04-01), Hidaka et al.
patent: 5136928 (1992-08-01), Hachisv
patent: 5212950 (1993-05-01), Shirai et al.
patent: 5235811 (1993-08-01), Arii et al.

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