Fluid handling – Pressure modulating relays or followers
Patent
1994-09-07
1995-12-12
Michalsky, Gerald A.
Fluid handling
Pressure modulating relays or followers
137544, 251 65, 25112916, 25112921, G05B 1150, F16K 3108
Patent
active
054741009
ABSTRACT:
An electricity/air pressure converter comprising a pair of housings, made of a soft magnetic material, in the middle of which pole pieces are disposed facing each other with an air gap therebetween and which have a cylindrically formed outer circumferential portion; a permanent magnet secured to one of the housings at one end thereof and surrounding one of the pole pieces; a movable member, made of a magnetic material and having spring properties, which is secured to the other end of the permanent magnet and which faces the pole pieces in the air gap; a coil which is wound around the other housing so that it surrounds the pole pieces and through which a current signal flows; and a nozzle which is disposed to face the movable member around the center of either of the pole pieces and which is in communication with one end of a restrictor which is supplied with a supply air pressure at the other end thereof, wherein back pressure is generated at the nozzle according to current signals being outputted as an air pressure signal. Advantageously, the configuration of the invention is compact, and is easily manufactured at low cost, and is highly reliable and stable.
REFERENCES:
patent: 2947284 (1960-08-01), Nicholson
patent: 3645293 (1972-02-01), Pedersen
patent: 3799498 (1974-03-01), Wickham et al.
patent: 3817488 (1974-06-01), Mack
patent: 4196751 (1980-04-01), Fischer et al.
patent: 4579137 (1986-04-01), Brandt
Kasahara Yasuo
Kimura Atsushi
Nishijima Takashi
Tsuchiya Masahito
Kojima Moonray
Michalsky Gerald A.
Yokogawa Electric Corporation
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