Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1987-06-25
1988-08-09
Huppert, Michael S.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
187 28, B66B 920
Patent
active
047622032
ABSTRACT:
A hydraulic relief valve terminates release of fluid to lower a lift truck load carriage if the load carriage becomes supported by external structure during one stage of lowering, and an electrical switch terminates release of fluid, and may disable truck travel, if the load carriage becomes so supported during a different stage of lowering.
REFERENCES:
patent: 3394778 (1968-07-01), Brinton
Huppert Michael S.
Noland Kenneth
Stephens Richard G.
The Raymond Corporation
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