Expansible chamber devices – Rectilinearly moving working member and coaxial or parallel...
Patent
1978-01-16
1980-03-18
Cohen, Irwin C.
Expansible chamber devices
Rectilinearly moving working member and coaxial or parallel...
74 99R, F01B 304
Patent
active
041933370
ABSTRACT:
An apparatus for providing rotational torque in response to fluid pressure including a housing having a diaphragm therein with means of providing differential fluid pressure across the diaphragm, a cylindrical plate acted upon by the diaphragm, a tubular fixed member supported coaxially within and attached to the housing, the fixed member having a longitudinal opening therethrough, a rotatable shaft partially received within the fixed member and partially extending externally of the housing, a longitudinal actuator member slidably and non-rotatably received within the fixed member, the actuator member having an axial opening therein telescopically receiving the shaft member and having an inclined slot defining a partial spiral about the longitudinal axis, a pin extending perpendicularly from the shaft and slidably received in the slot in the actuator member, the actuator member being affixed to the circular plate so that as fluid pressure is applied to the diaphragm the actuator member slides in the fixed member and imparts rotation to the pin and thereby to the actuator member to rotate the shaft. The device is particularly adaptable as an actuator for a rotatable valve, the actuator being affixed to the shaft of the valve so that the valve can be opened and closed by the application of pressure differential across the diaphragm.
REFERENCES:
patent: 1052763 (1913-02-01), Stone et al.
patent: 2315775 (1943-04-01), D'Arcey
patent: 2998805 (1961-09-01), Usab
patent: 3046802 (1962-07-01), Cupedo
patent: 3078065 (1963-02-01), Vickery
patent: 3207468 (1965-09-01), Lauducci et al.
patent: 3319925 (1967-05-01), Kojima et al.
patent: 3417960 (1968-12-01), Stehlin
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