Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1978-09-22
1981-09-01
Spar, Robert J.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
91518, B66B 920
Patent
active
042866928
ABSTRACT:
A hydraulic control circuit especially for use with multi-function hydraulic devices, such as for industrial lift truck attachments, in which a combination of valves are adapted to operate two or more hydraulic systems, the valve system being designed such that a minimum number of hydraulic conduits are required to connect the main hydraulic system to the hydraulic devices, as from a lift truck to an attachment supporting carriage on a lift truck upright, and no electric lines are required to be connected to switching devices between the hydraulic devices, such as to solenoid operated valves.
REFERENCES:
patent: 3692198 (1972-09-01), Lake
patent: 3705631 (1972-12-01), Seaberg
patent: 3976097 (1976-08-01), Brakel
patent: 3982469 (1976-09-01), Blanchetta
patent: 4161256 (1979-07-01), Seaberg
Bauer James J.
Chichester Willard L.
Clark Equipment Company
Noland Kenneth
Spar Robert J.
Wiessler J. C.
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