Motors: expansible chamber type – Working member position responsive motive fluid control – Venting expanding chamber
Patent
1978-12-11
1981-06-30
Cohen, Irwin C.
Motors: expansible chamber type
Working member position responsive motive fluid control
Venting expanding chamber
91402, 92136, 92193, 92250, 277165, 277194, F15B 1522, F16J 100, F16J 902
Patent
active
042756413
ABSTRACT:
A servo cylinder having a piston of the kind having spaced sections which move into an enlarged diameter low pressure bore portion of the cylinder is provided with a gasket assembly for each piston section in the form of an elastic sealing gasket having a resiliently flexible radial flange extending from an integral collar and supported by a rigid ring having a certain circumferential clearance from the collar to permit radial movement for misalignment compensation. The gasket may be formed in the cross-sectional shape of an L or of a T. Where an L-shape is used, a single support ring is provided and where a T-shape is used a support ring on each side of the radially extending flange which forms the leg of the T oriented 90.degree. would be used. The ring or rings are protective of the radial flange in either direction of movement of the respective piston.
REFERENCES:
patent: 2009958 (1935-07-01), Hance
patent: 2509672 (1950-05-01), Christensen
patent: 2607644 (1952-08-01), Smith et al.
patent: 3388915 (1968-06-01), Dega
patent: 3656414 (1972-04-01), Muller
patent: 3818805 (1974-06-01), Johansson
patent: 4069747 (1978-01-01), Forry et al.
Cohen Irwin C.
Zahnradfabrik Friedrichshafen AG
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