Earth working – Mounting for pushed tool at end of motor vehicle – Transversely mounted blade
Patent
1982-06-14
1985-03-19
Hershkovitz, Abraham
Earth working
Mounting for pushed tool at end of motor vehicle
Transversely mounted blade
91420, 91515, 172826, E02F 376, F16B 1100
Patent
active
045053391
ABSTRACT:
A hydraulic circuit for pitch and tilt control of a dozer blade attached to push arms on a vehicle with a pitch ram connected between one push arm and the blade and a dual actuator consisting of a second pitch ram and a tilt ram connected at their head ends. A pitch valve directs hydraulic fluid to and from the pitch rams with a diverter/combiner valve interposed therebetween to assure a flow of fluid either to said rams or from said rams at equal rates. Pilot-operated check valves hydraulically lock the pitch rams until opened by pressure directed from said pitch valve. Tilt and lift valves directs fluid pressure to and from the tilt ram and a lift ram respectively with regeneration capability for both tilt and lift functions.
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Kirkham Steven C.
Kramer Lee F.
Schantz Ronald K.
Tschanz Charles M.
Deutsch Barry E.
Dresser Industries Inc.
Hershkovitz Abraham
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