Motors: expansible chamber type – Fluid supply through diverse paths to single expansible chamber – Activation of one path disables second path
Patent
1974-10-29
1976-07-13
Cohen, Irwin C.
Motors: expansible chamber type
Fluid supply through diverse paths to single expansible chamber
Activation of one path disables second path
91461, 1376254, F15B 13042
Patent
active
039687295
ABSTRACT:
A fluid-operated apparatus receiving an input pressure signal exhibits a hysteresis or deadband effect by responding to an increasing pressure signal at a first level and a decreasing signal at a second and lower level. The apparatus includes a spool valve to which the input pressure signal is applied at one end of the spool. The opposite end of the spool having a given cross sectional area projects into a pressure chamber and contacts the poppet of a poppet valve held closed by a regulated pressure in opposition to forces produced by the spool. The seat of the poppet valve surrounds an opening into the pressure chamber so that the regulated pressure is admitted into the pressure chamber when the spool pushes the poppet open. The effective area of the valve seat is greater than the cross sectional area of the spool end engaging the poppet so that the force or input pressure signal required to move the spool and open the poppet valve is greater than that which permits the spool to return and close the poppet valve. A hysteresis or deadband effect determined by the different cross sectional areas is manifested by the spool movements and a hydraulic mechanism controlled by those movements.
REFERENCES:
patent: 2825361 (1958-03-01), Seljos
patent: 2835265 (1958-05-01), Brandstadter
patent: 2962002 (1960-11-01), Hayner
patent: 2989950 (1961-06-01), Lockman
patent: 3052254 (1962-09-01), Parks
Crombie Dean H.
Hansen Kenneth P.
Cohen Irwin C.
Del Ponti John D.
United Technologies Corporation
LandOfFree
Fluid-operated apparatus exhibiting hysteresis effect does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fluid-operated apparatus exhibiting hysteresis effect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluid-operated apparatus exhibiting hysteresis effect will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1734231