Motors: expansible chamber type – Plural relatively movable or rigidly interconnected working... – Condition responsive means for modifying working member...
Patent
1983-04-27
1985-04-02
Garrett, Robert E.
Motors: expansible chamber type
Plural relatively movable or rigidly interconnected working...
Condition responsive means for modifying working member...
91517, 91518, 91529, 414699, F15B 1100
Patent
active
045080135
ABSTRACT:
A remote controlled hydraulic circuit of the type comprising a source of pressurized fluid, a number of hydraulic motors connectible to the source of pressurized fluid, and control means for connecting the source of pressurized fluid to the hydraulic motors, the control means being remotely piloted by a series of pressure signals each of which corresponds to the opening of the connection between the source of pressurized fluid and a respective hydraulic motor. The hydraulic circuit according to the invention includes selector means for establishing priority for supplying pressurized fluid to one or more preferential hydraulic motors. These selector means are intended to detect, when operatively active, pressure signals corresponding to the supply of pressurized fluid to the preferential hydraulic motors and, in this condition, to render inoperative the control means associated with the other hydraulic motors, should they already have been activated to effect the supply of these other hydraulic motors.
The hydraulic circuit according to the invention is used, for example, in the control of a lifting arm or boom for the bucket of an earth-moving machine so as to ensure return movement of the bucket when the latter is operated simultaneously with or at the same time as the movement of the lifting arm.
REFERENCES:
patent: 2892311 (1959-06-01), Van Gerpen
patent: 3978998 (1976-09-01), Klitz
patent: 3991571 (1976-11-01), Johnson
patent: 4286692 (1981-09-01), Bauer et al.
patent: 4343151 (1982-08-01), Lorimor
patent: 4369625 (1983-01-01), Izumi et al.
patent: 4372193 (1983-02-01), Hall
Brown Robert A.
Fiatallis Europe S.p.A.
Garrett Robert E.
Nauman Timothy E.
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