Fluid handling – Processes
Patent
1991-12-18
1993-09-14
Michalsky, Gerald A.
Fluid handling
Processes
137554, 13762562, 13762564, F15B 13043
Patent
active
052440028
ABSTRACT:
An electro hydraulic servo valve has a pair of oppositely polarized magnets mounted in the surface of the spool of the valve to be controlled. A Hall effect sensor is mounted in the housing adjacent the magnets to precisely measure the position of the spool relative to the housing. The magnets and transducer are mounted on the longitudinal centerline of the spool to eliminate the spurious signals, due to temperature, vibrations, shock, hydraulic supply pressure and back pressure. The strength and spacing of the magnets and air gap are chosen to provide a linear output signal over the range of displacement desired and to provide the accuracy of location necessary for the particular configuration.
REFERENCES:
patent: 3835888 (1974-09-01), Leutner et al.
patent: 4176586 (1979-12-01), Stoll et al.
patent: 4310143 (1982-01-01), Determan
patent: 4372192 (1983-02-01), Liennu
patent: 4456031 (1984-06-01), Taplin
patent: 4585029 (1986-04-01), Harding
patent: 4742794 (1988-05-01), Hagstrom
patent: 4793241 (1988-12-01), Mano et al.
patent: 4907615 (1990-03-01), Meyer et al.
patent: 4954776 (1990-09-01), Husher
Michalsky Gerald A.
Moog Controls Inc.
LandOfFree
Spool position indicator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Spool position indicator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spool position indicator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2020807