Fluid operated actuator with recessed position sensor and recess

Details Fluid operated actuator with recessed position sensor and recess Fluid operated actuator with recessed position sensor and recess

1989-05-19

1991-01-08

Look, Edward K.

Expansible chamber devices

With inspection window in expansible chamber wall portion

With lock

92 85B, 921691, 921701, 92177, 92165PR, 92128, 200 82E, F01B 2526, F01B 3112

Patent

active

049826522

ABSTRACT:
A fluid operated actuator includes a housing having a longitudinally extending aperture with open ends. First and second end caps are attached to opposite ends of the housing forming a chamber within the housing. A longitudinally reciprocal piston and attached rod are disposed within the chamber with the rod extending externally of the chamber through one of the end caps. The piston is adapted for reciprocal movement from one end limit of travel adjacent the first end cap to a second end limit of travel adjacent the second end cap. At least one of the first and second end caps includes a longitudinal aperture in communication with the chamber and a transverse aperture communicating between the longitudinal aperture and an exterior of the end cap. A sleeve is connected to the rod adjacent the piston and is engageable within the longitudinal aperture of the end cap when the piston is in the end limit of travel. A sensor is sealingly engaged within the transverse aperture of the end cap for sensing the piston in the end limit of travel. A retaining ring secures the sensor within the transverse aperture, while allowing pull-out removal of the sensor when the retaining ring is removed. The housing includes a recessed portion formed on an external surface defining two shoulders generally parallel to the end caps. Each shoulder has an aperture extending outwardly toward the end of the housing adjacent the end caps. Bolts are engaged through the aperture in the shoulders for threadingly securing the end cap to the housing, such that the end cap is removable without dismounting the fluid operated actuator.

REFERENCES:
patent: Re25257 (1962-10-01), Ellis, Jr.
patent: 3141381 (1964-07-01), MacDonald
patent: 3661053 (1972-05-01), Rich
patent: 3726191 (1973-04-01), Johnston et al.
patent: 4207565 (1980-06-01), Isakson et al.
patent: 4210064 (1980-07-01), Beerens
patent: 4316145 (1982-02-01), Tann
patent: 4523514 (1985-06-01), Burk
patent: 4632018 (1986-12-01), Lymburner
patent: 4656457 (1987-04-01), Brausfeld et al.
patent: 4681992 (1987-07-01), Kazmierski
patent: 4726282 (1988-02-01), La Bair

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