Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1977-09-16
1979-04-03
Maslousky, Paul E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
251322, F15B 910
Patent
active
041470915
ABSTRACT:
A fluid pressure servomotor has a casing having a movable wall therein dividing the interior of the casing into two chambers, a valve body connected to the movable wall and receiving a valve mechanism communicating one of the chambers selectively with the other chamber or with a source of fluid pressure such as atmospheric pressure, an input rod mounted in the valve body to operate the valve mechanism, and a spring urging the input rod outwardly of the valve body. There is provided a flange portion on the input rod, a spring retaining member having a hole the diameter of which is larger than the flange portion of the input rod and abutted by the spring on one side surface thereof and having a circumferentially extending projection on the other side surface thereof, and a stop ring fitted around the input rod and abutting the inner end of the flange portion of the input rod and the other side surface of the retaining member with the outer circumference thereof being fitted in the inner circumference of the projection.
REFERENCES:
patent: 3183789 (1965-05-01), Stelzer
patent: 3209657 (1965-10-01), Randol
patent: 3548718 (1970-12-01), Utton
Maslousky Paul E.
Tokico Ltd.
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