Actuator with failfixed zero drift

Details Actuator with failfixed zero drift Actuator with failfixed zero drift

1996-11-29

1998-04-07

Lopez, F. Daniel

Power plants

Pressure fluid source and motor

Apparatus having means responsive to or ameliorating the...

91 44, 91 45, 92 18, F16D 3102

Patent

active

057351228

ABSTRACT:
The present invention provides an actuator controlled by an electro-hydraulic servovalve with a failfixed operation upon the loss of electrical power to the servovalve. A lock valve has apertures therethrough with friction pads therein for locking the actuator in position upon loss of the electrical power.

REFERENCES:
patent: 3034483 (1962-05-01), Rasmussen
patent: 3176590 (1965-04-01), Uhtenwoldt et al.
patent: 3922955 (1975-12-01), Kast
patent: 4256017 (1981-03-01), Eastman
patent: 4276809 (1981-07-01), Kast
patent: 4375780 (1983-03-01), Davis
patent: 4470337 (1984-09-01), Kast
patent: 4619188 (1986-10-01), Kimura
patent: 4633758 (1987-01-01), Kedzierski

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