Mechanism control

Details Mechanism control Mechanism control

1976-12-01

1978-04-25

Hoffman, Drayton E.

91420, E02F 332

Patent

active

040858553

ABSTRACT:
Control for a swing mechanism having linear actuators such as hydraulic cylinders connected to the swing mechanism in a manner whereby the actuators work in unison with each other over a portion of the swing of the swing mechanism and in opposition to each other over another portion of the swing when imparting arcuate motion to the swing mechanism with the linear motion of the actuators. The control includes a pressure reducing-metering valve and a metering valve in each of two sets of lines which supply and return pressurized fluid to the actuators. The improvement comprises location of check valves and pilot lines to enhance anti-cavitation conditions by reducing the number of flow paths.

REFERENCES:
patent: 3795178 (1974-03-01), Roche
patent: 3922855 (1975-12-01), Bridwell et al.
patent: 4007845 (1977-02-01), Worback

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