Apparatus and method for controlling multiple fluid cylinders

Details Apparatus and method for controlling multiple fluid cylinders Apparatus and method for controlling multiple fluid cylinders

1996-11-26

1998-08-18

Lopez, F. Daniel

Motors: expansible chamber type

Plural relatively movable or rigidly interconnected working...

Single valve for relatively movable working members

F15B 1306

Patent

active

057945110

ABSTRACT:
An apparatus for controlling a first fluid cylinder and a second fluid cylinder includes an operational pressure source and a fluid control circuit. The fluid control circuit includes a pilot valve assembly having a first valve position and a second valve position. Moreover, the fluid control circuit (1) delivers pressure from the operational pressure source to the first fluid cylinder when the pilot valve assembly is positioned in the first valve position, (2) isolates the second fluid cylinder from the operational pressure source when the pilot valve assembly is positioned in the first valve position, (3) delivers pressure from the operational pressure source to the second fluid cylinder when the pilot valve assembly is positioned in the second valve position, and (4) isolates the first fluid cylinder from the operational pressure source when the pilot valve assembly is positioned in the second valve position. A method for controlling a first fluid cylinder and a second fluid cylinder is also disclosed.

REFERENCES:
patent: 3304633 (1967-02-01), Hein et al.
patent: 3512453 (1970-05-01), Balzer
patent: 3589242 (1971-06-01), Peterson et al.
patent: 3871266 (1975-03-01), Schwab et al.
patent: 3921479 (1975-11-01), Katz
patent: 3966066 (1976-06-01), Schexnayder
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patent: 4589076 (1986-05-01), Fujioka
patent: 4704947 (1987-11-01), Schneider
patent: 4802537 (1989-02-01), Ryerson
WO 83/01661 International Application No. PCT/US81/01484 "Lock Valve"--James L. Reeves.

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