Fluid pressure operable servo positioner

Details Fluid pressure operable servo positioner Fluid pressure operable servo positioner

1977-01-14

1978-11-14

Schwadron, Martin P.

Expansible chamber devices

Mutually relatively movable cylinder or sleeve, member...

92 63, 92 65, 92129, 92151, F01B 720

Patent

active

041250591

ABSTRACT:
A fluid pressure operable servo positioner including a pair of operating piston units diametrally opposingly arranged relative to and abuttingly engageable with opposite sides of a mechanical operating member or lever for positioning the operating member in a preselected position determined by the degree of actuating pressure acting on the piston or pistons which are retractable by return springs, when relieved of actuating pressure acting thereon, completely out of contact with the operating member to an extent at which the operating member may be manually positioned, within a full range of positions, free of any resistance such as piston friction.

REFERENCES:
patent: 2671431 (1954-03-01), Zumbusch
patent: 2831464 (1958-04-01), Lillquist
patent: 3152520 (1964-10-01), Heese
patent: 3791230 (1974-02-01), Webb
patent: 4002105 (1977-01-01), Bell

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