Actuating means for a servo valve

Details Actuating means for a servo valve Actuating means for a servo valve

1984-08-15

1986-04-08

Novosad, Stephen J.

Road structure, process, or apparatus

Apparatus

Automatic control

74105, 74526, 318587, 172 45, E01C 1900

Patent

active

045809232

ABSTRACT:
The invention comprises a crank-linkage arrangement for a hydraulic servo valve, used on a road planer, to give the valve more sensitivity. It has a valve-operating crank coupled to a leverage-type linkage. The linkage responds to movements of a ground-engaging ski, which tracks the road surface, by displacing a same degree as does the ski, but by effecting a greater displacement of the crank. Limit stops on either sides of a limb of the linkage prevent any damaging overtravel of the crank.

REFERENCES:
patent: 1200447 (1916-10-01), Albers
patent: 3334560 (1967-08-01), Long et al.
patent: 3519770 (1970-07-01), Long et al.
patent: 3846035 (1974-11-01), Davin

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