Device for remote control, with possibility for direct control,

Details Device for remote control, with possibility for direct control, Device for remote control, with possibility for direct control,

1989-11-01

1991-08-27

Look, Edward K.

Motors: expansible chamber type

With alternative manual actuation of load

Alternate pedal positions

92129, 92DIG4, 13762566, 251 14, 251289, F15B 1310

Patent

active

050423630

ABSTRACT:
The invention aims at bringing about a device for remote controlling of, for example, directional valves, which likewise allows a manual direct controlling, using a hand lever, for example. The control device includes a hydraulic cylinder (37) with ports (31,32) for feeding and evacuating, respectively, of hydraulic fluid, a piston (14) arranged in the cylinder (37), as well as a piston rod (13), for accomplishing the controlling function. The piston rod (13) is arranged to be slideably supported in the piston (14), allowing a limited movement of the piston rod (13) relative to the piston (14) independent of the pressure and load conditions in the cylinder (37), the movement possibility of the piston rod (13) being limited in at least one direction by a stop (17) arranged on the piston rod.

REFERENCES:
patent: 2229247 (1941-01-01), Kamenarovic
patent: 2649842 (1953-08-01), Caldwell et al.
patent: 3424062 (1966-11-01), Gummer et al.
patent: 3502003 (1970-03-01), Dobrikin et al.
patent: 4069836 (1978-01-01), Sowinski
patent: 4089392 (1978-05-01), Ostrowski
patent: 4469119 (1984-09-01), Snyder et al.

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