Drive controlling mechanism

Details Drive controlling mechanism Drive controlling mechanism

1978-05-05

1980-05-06

Freeh, William L.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

180308, B60T 1704, B60R 302, F01B 1306

Patent

active

042012791

ABSTRACT:
A drive controlling mechanism comprises an operative block assembly securely connected with a motor housing accommodating therein a hydraulic motor and rotatably receiving a rotary shaft of the hydraulic motor; a parking brake arrangement connected with the operative block assembly to brake and release a rotary shaft; a control valve arrangement provided to control of the hydraulic motor and actuation of the parking brake arrangement; a pair of inlet-outlet passages connecting the actuation ports of the hydraulic motor and the control valve arrangement; a control conduit arrangement having a shuttle valve permitting fluid under pressure to be introduced into the parking brake arrangement from the control valve arrangement and to be discharged from the parking brake arrangement; and a drain passage arrangement for discharging fluid under pressure from the parking brake arrangement through the shuttle valve to a drain chamber defined between the motor housing and the hydraulic motor.

REFERENCES:
patent: 2445585 (1948-07-01), Shaff
patent: 2743708 (1956-05-01), Lungerhausan
patent: 2823775 (1958-02-01), Zwayer
patent: 3439766 (1969-04-01), Dence
patent: 3640069 (1972-02-01), Sugahara et al.
patent: 3771627 (1973-11-01), Caldwell
patent: 3799302 (1974-03-01), Workman
patent: 3912057 (1975-10-01), Krouse

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