Machine element or mechanism – Control lever and linkage systems – Hand operated
Patent
1993-05-05
1994-11-08
Herrmann, Allan D.
Machine element or mechanism
Control lever and linkage systems
Hand operated
74523, 180 193, 180315, 192131R, G05G 904
Patent
active
053616448
ABSTRACT:
A control panel (24) of an industrial truck is provided, on two sides, with combination control grips (2a, 2b), which can both be rotated in the circumferential direction and deflected vertically, and on which control levers (45a, 45b) are arranged. Signal transmitters (51, 52), which can be operated by the fingers, and by means of which various types of movements of an internal load pickup means of the truck can be selected and can be preset as a set value for the control lever (45) of the respective opposite combination control grip (2), are integrated within the control levers (45a, 45b). By rotating the combination control grips (2a, 2b) by means of the control levers (45a, 45b) in the circumferential direction, proportional speed signals are generated for the selected movements of the load pickup means, while the vertical deflecting movement of the combination control grips is used primarily for the forced acknowledgment of two-hand control commands in order to rule out the possibility that the operator of the truck would reach out of the lateral contour of the truck in the aisle. The rotary and swinging deflecting movements are measured to form control signals. All signal-generating elements are mutually connected, in principle, such that their simultaneous, bilateral operation is required for moving the industrial truck and/or for steering the load-pickup device.
REFERENCES:
patent: 3491867 (1970-01-01), Alexander
patent: 3937294 (1976-02-01), Haddock
patent: 4555960 (1985-12-01), King
patent: 4645030 (1987-02-01), Von Bernuth et al.
patent: 4726248 (1988-02-01), Kawai et al.
Nedele Helmut
Schnabel Hartwig
Herrmann Allan D.
Wagner Fordertechnik GmbH & Co. KG
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