Fluid handling – Systems – Multi-way valve unit
Patent
1987-06-22
1988-08-09
Michalsky, Gerald A.
Fluid handling
Systems
Multi-way valve unit
1376256, F15B 13043
Patent
active
047621478
ABSTRACT:
A servo valve assembly having torque feedback includes a housing and a valve spool disposed for axial translation therein. The valve spool has a plurality of lands alternating with three reduced diameter regions which cooperate with axially spaced apart inlet, return and service ports in the housing. The servo mechanism includes a piston integrally formed with the valve spool. An axial bore extends through the spool and receives a control rod having an axially extending flat which cooperates with radial passageways in the valve spool. At the end of the control rod is a torque motor which rotates bi-directionally and provides an input signal to which the servo valve assembly responds. Between the torque motor and the valve housing is a torque feedback assembly. The assembly includes a pair of cantilever spring arms each fixed at one end, the opposite ends of each of the cantilever arms coupled to a respective pair of pistons which are in communication with respective service ports. A cross member interconnects the cantilever arms adjacent the pistons. A pair of springs couple the cantilever arms to a torque arm extending radially from the control rod. In an alternate embodiment, torque feedback is provided directly from the valve spool to one of the cantilever spring arms through a pivoted, right angle crank arm.
REFERENCES:
patent: Re25338 (1963-02-01), Olson
patent: 123174 (1872-01-01), Hopkins
patent: 1005641 (1911-10-01), Gilson
patent: 2600348 (1952-06-01), Walthers
patent: 2615466 (1952-10-01), Garde
patent: 2621676 (1952-12-01), Loft
patent: 3023782 (1962-03-01), Chaves, Jr. et al.
patent: 3033228 (1962-05-01), Mohler
patent: 3106224 (1963-10-01), Moss
patent: 3125002 (1964-03-01), McCombs
patent: 3174406 (1965-03-01), Hague et al.
patent: 3219060 (1965-11-01), Pearl et al.
patent: 3311123 (1967-03-01), Tsien et al.
patent: 3386457 (1968-06-01), Adams
patent: 3405600 (1968-10-01), Ballard et al.
patent: 3420141 (1969-01-01), Hague et al.
patent: 3424183 (1969-01-01), Coakley
patent: 3523673 (1970-08-01), Mitchell et al.
patent: 3566919 (1971-03-01), Vanderlaan
patent: 3568718 (1971-03-01), Wilke
patent: 3665807 (1972-05-01), Bartholomaus et al.
patent: 3674041 (1972-07-01), Beals
patent: 3696835 (1972-10-01), Pauliukonis
patent: 4145956 (1979-03-01), Rumrill et al.
patent: 4243062 (1981-01-01), Shelton
patent: 4281676 (1981-08-01), Morris
patent: 4368750 (1983-01-01), Burton
patent: 4371178 (1983-02-01), Ott
patent: 4545409 (1985-10-01), Luhmer
Jet-Pipe Servovalves, a Design for Reliability brochure.
Olsen Controls, Inc. Model LS-300 Linear Electro-Hydraulic Pulse Drive Specifications.
Advertisement for Double A's Solenoid Valves.
Picture of a MOOG Inc. Servovalve.
Copy of a Photograph of an Air Directional Spool Valve With a Solenoid Controlled Pilot Stage.
LandOfFree
Servo valve with torque 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 Servo valve with torque feedback, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Servo valve with torque feedback will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-913051