Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1992-02-05
1993-02-09
Olszewski, Robert P.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
74491, 414631, 13762566, B66B 920
Patent
active
051846993
ABSTRACT:
In a control device for forklift on which a flow control signal is sent from a controller in accordance with a manipulated variable of work machine lever operated by the operator and this flow control signal regulates the degree of opening of an electromagnetic proportional control valve in an oil pipe line to control the working speed of lift cylinders, the degree of opening of the electromagnetic proportional control valve is regulated by a flow control signal having a characteristic such that the value of flow control signal changes in accordance with the load of lift cylinders in the inching zone where the manipulated variable of work machine lever is relatively small, which improves the operability in the inching zone.
REFERENCES:
patent: 3014344 (1961-12-01), Arnot
patent: 4817760 (1989-04-01), Yamamura
patent: 5011363 (1991-04-01), Conley, III et al.
Aoki Kanji
Midorikawa Toshiyuki
Uchiyama Yukio
MHI Sagami High Technology & Control
Mitsubishi Jukogyo Kabushiki Kaisha
Noland Kenneth
Olszewski Robert P.
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