Inching control system for industrial lift trucks

Details Inching control system for industrial lift trucks Inching control system for industrial lift trucks

1978-11-22

1980-09-16

Caun, Peter M.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192113R, B60K 2902, F16D 2510

Patent

active

042224691

ABSTRACT:
A system for effecting the gradual engagement and disengagement of the clutches of a fluid power shifted transmission for industrial lift trucks. The system includes a selector valve for porting fluid from an engine driven pump to the clutches of the transmission and from the clutches to a system reservoir; the selector valve includes damping means for limiting the rate of change in flow through the valve. The system further includes a control valve which operates to limit the pump outlet pressure at engine speeds above a predetermined maximum and to decrease the pump outlet pressure and therefore the clutch actuation force in response to increases in the force applied by the truck brakes.

REFERENCES:
patent: 2979963 (1961-04-01), Snoy
patent: 2997144 (1961-08-01), Gsching et al.
patent: 3613844 (1971-10-01), Asano et al.
patent: 3674121 (1972-07-01), Copeland
patent: 3715017 (1973-02-01), Jenny
patent: 3774736 (1973-11-01), Ito et al.
patent: 3938637 (1976-02-01), Murakami
patent: 3941223 (1976-03-01), Murakami
patent: 3990549 (1976-11-01), Sisson
patent: 4006685 (1977-02-01), Zeller

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