Fail-fixed servovalve with positive fluid feedback

Details Fail-fixed servovalve with positive fluid feedback Fail-fixed servovalve with positive fluid feedback

1982-07-06

1984-09-11

Garrett, Robert E.

Motors: expansible chamber type

Jet control type

91417R, 91459, 91461, F15B 1108, F15B 13044, F15B 1517

Patent

active

044703376

ABSTRACT:
The servovalve includes a primary jet of fluid. A variable control signal is adapted to vary the angular position of the primary jet from its maximum recovery position. A first fluid path is adapted to supply fluid to a servopiston at a variable pressure determined at least in part by the control signal. A second fluid path is adapted to receive a predetermined portion of the primary jet fluid when the control signal reaches a predetermined value. The second fluid path terminates in the vicinity of the primary jet and is adapted to direct a secondary jet of fluid at the primary jet to deflect the primary jet toward the input orifice of the second fluid path. The resultant positive fluid feedback in the second fluid path causes the primary jet to latch in a first angular position relative to the maximum recovery position when the control signal reaches a predetermined value. The servovalve may further include a means to discharge the fluid and a means to block the first fluid path to the servopiston when the control signal falls below a second predetermined value. A method of operating a fail-fixed servovalve is also described.

REFERENCES:
patent: 3766832 (1973-10-01), Hayner
patent: 4227443 (1980-10-01), Toot
patent: 4265162 (1981-05-01), Neradka et al.
patent: 4276809 (1981-07-01), Kast
Electromechanical Design-Pure Fluid Amplification, Jun. 1960, pp. 60, 61.

Affiliated with

Also associated with

Rating

Fail-fixed servovalve with positive fluid feedback does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fail-fixed servovalve with positive fluid feedback, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fail-fixed servovalve with positive fluid feedback will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1189586