Machine element or mechanism – Control lever and linkage systems – Elements
Patent
1989-03-02
1990-05-08
Luong, Vinh T.
Machine element or mechanism
Control lever and linkage systems
Elements
340686, G05G 506, G08B 2100
Patent
active
049227840
ABSTRACT:
A detent device for a control lever includes a cam which moves integral with a control lever by operation of the control lever. A piston is mounted such that the state wherein the end thereof comes into sliding contact with the cam, during movement of the cam, a pressure chamber is formed to communicate with a part of the piston opposite the sliding surface. A spring is provided within the pressure chamber to bias the piston toward the cam. The cam is provided with a detent portion in a part of the surface with which the piston contacts the detent portion. The sliding resistance of the end of the piston is greater at the detent position of the control lever, than at the other locations. A detector detects that the end of the piston is positioned at said detent portion. An oil-pressure supply device supplies oil pressure to the pressure chamber on the basis of a detection signal from the detector. The detector includes an electric contact constituted by a piston and a cam.
REFERENCES:
patent: 3284910 (1966-11-01), Klasek
patent: 3414879 (1968-12-01), Holland
patent: 4107492 (1978-08-01), Moon et al.
patent: 4163970 (1979-08-01), Allinquant et al.
patent: 4381507 (1983-04-01), Parmer
patent: 4542373 (1985-09-01), Hillock
patent: 4558312 (1985-12-01), Yonemoto et al.
patent: 4799048 (1989-01-01), Goshima et al.
Fujimoto Yoshiaki
Hidaka Sachio
Tani Takao
Kabushiki Kaisha Kobe Seiko Sho
Luong Vinh T.
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