Control device for forward-reverse transmission gears

Details Control device for forward-reverse transmission gears Control device for forward-reverse transmission gears

1974-09-13

1977-05-31

Wyche, Benjamin W.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

13761417, 1376374, B60K 2902

Patent

active

040263967

ABSTRACT:
Pressure fluid control for a transmission. There is provided a pressure fluid control device for a transmission, particularly applicable to use in fork lift trucks, wherein a suitable hydraulic selector receives pressure medium from a pressure creating device such as a pump and directs same through a pressure regulating valve to a selected one of the transmission clutches or couplings. Particularly the pressure regulating valve is arranged in a rotary slide valve of the hydraulic selector and is arranged to respond to a piston energized by brake pressure fluid. Thus by the use of very simple apparatus the first portion of a brake pedal movement is utilized to disengage a transmission.

REFERENCES:
patent: 2700985 (1955-02-01), Gleasman
patent: 3007347 (1961-11-01), Gendron et al.
patent: 3042165 (1962-07-01), Yokel
patent: 3143127 (1964-08-01), Frost
patent: 3213888 (1965-10-01), Cameron et al.
patent: 3613844 (1971-10-01), Asano et al.
patent: 3752281 (1973-08-01), Arnold
patent: 3823801 (1974-07-01), Arnold
patent: 3850273 (1974-11-01), Murakami

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