Variable hydraulic pump nonlinear control with cam-actuated, adj

Details Variable hydraulic pump nonlinear control with cam-actuated, adj Variable hydraulic pump nonlinear control with cam-actuated, adj

1977-03-28

1978-06-20

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Having a mechanical clutch or brake device in the power train

60905, 74471R, 192 1, F15B 1518

Patent

active

040954242

ABSTRACT:
A nonlinear hydraulic pump control provides a primary control output as a mechanical actuator arm displacement either side of a neutral or "Off" position. A secondary control, also cam activated, operates in selectable offset sequence with the primary output, with the offset magnitude being selectively adjustable and effected either symmetrically about the primary control neutral position or differentially with respect thereto. The secondary control is useful in starting, stopping, or modulating accessory gear which cooperates with the pump operation, such as brake release control for a hydraulic winch to assure controlling hydraulic pressure buildup prior to brake release for both inhaul and outhaul operations where the winch cable is constantly subjected to tension loading.

REFERENCES:
patent: 2516662 (1950-07-01), Vickers et al.
patent: 2836270 (1958-05-01), Leopold
patent: 2872827 (1959-02-01), Thoma
patent: 3107490 (1963-10-01), Cooper et al.

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