Inching control apparatus

Details Inching control apparatus Inching control apparatus

1983-09-27

1986-04-01

Herrmann, Allan D.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 12C, 192 8719, F16D 6704

Patent

active

045792003

ABSTRACT:
An inching control apparatus comprising a hydraulic pressure source, a plurality of clutches and, in a hydraulic circuit connecting the clutches to the hydraulic pressure source, a pressure regulating valve, an inching valve which receives output pressure from the pressure regulating valve for delivering inching control pressure, and a selector valve which receives control pressure from the inching valve for selecting engaging and disengaging the frictional engaging means. The inching valve delivers the output pressure from the pressure regulating valve directly when an inching pedal is not depressed by the driver's foot, and delivers a control pressure, which diminishes as the amount of pedal depression increases, when said amount of depression exceeds a predetermined amount. The inching valve controls the output pressure from the pressure regulating valve by operating an inching spool which is pushed through a first spring by an inching rod operatively associated with the pedal and biased by a second spring against the first spring, and which is equipped with first and second pressure-receiving portions operating against one another.

REFERENCES:
patent: 3125201 (1964-03-01), Fisher
patent: 3292752 (1966-12-01), Schuster et al.
patent: 3400601 (1968-09-01), Ruhl et al.
patent: 3631948 (1972-01-01), Ishikawa et al.
patent: 3715017 (1973-02-01), Jenney
patent: 3941223 (1976-03-01), Murakami
patent: 3948366 (1976-04-01), Kitano et al.
patent: 3957145 (1976-05-01), Kitano et al.
patent: 3990549 (1976-11-01), Sisson et al.
patent: 4293059 (1981-10-01), Lucas

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