Expansible chamber devices – Rectilinearly moving working member and coaxial or parallel... – Element extends through working member portion
Patent
1988-10-07
1989-11-28
Walton, George L.
Expansible chamber devices
Rectilinearly moving working member and coaxial or parallel...
Element extends through working member portion
91533, 74 89, 251 31, 251 58, 251 62, 251229, F01B 716, F16H 5502, F16K 31124, F16K 3153
Patent
active
048829790
ABSTRACT:
A fluid-powered actuator having a body with first and second end walls, with a bulkhead positioned therebetween, which is adjustably rotatable to angularly position the bulkhead relative to the body for fluid-powered operation to establish the end limits of rotation of an output shaft. The actuator has first and second piston heads disposed in the body on opposite sides of the bulkhead to define four fluid-tight chambers. In the preferred embodiment, the bulkhead is selectively clamped between two sidewall portions. A sleeve extends between and fixedly connects the piston heads together. A plurality of guide rods are fixedly attached to and extend between the piston heads and through apertures in the bulkhead in one embodiment, and between the first piston head and the bulkhead and through apertures in the first piston head in another embodiment to transmit torque to the body and through the bulkhead. An alternative embodiment has an eccentric piston sleeve projecting through a correspondingly sized and shaped aperture in the bulkhead to transmit torque. Seals are provided to prevent fluid leakage between the four fluid-tight chambers.
REFERENCES:
patent: 2932206 (1960-04-01), Tootle
patent: 2936737 (1960-05-01), Miller
patent: 2955579 (1960-10-01), Block
patent: 2970574 (1961-02-01), Geyer
patent: 3187592 (1965-06-01), Geyer
patent: 3499342 (1970-03-01), Ligh
patent: 3508472 (1970-04-01), Hartwick, Jr.
patent: 4196654 (1980-04-01), Stearns
patent: 4603616 (1986-08-01), Zajac
Carter Helical Rod Series. Carter Controls, Inc. Bulletin RA-500E (Applicant admits this reference is prior art.)
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