Drive controlling mechanism

Details Drive controlling mechanism Drive controlling mechanism

1980-02-15

1982-05-18

Freeh, William L.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

91499, 180308, F60K 4120, F01B 1304

Patent

active

043300510

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 rotatary 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 permiting 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: 3439766 (1969-04-01), Dance et al.
patent: 3954026 (1976-05-01), Rittman
patent: 4213514 (1980-07-01), Eholinger et al.

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