Machine element or mechanism – Mechanical movements – Reciprocating or oscillating to or from alternating rotary
Patent
1988-10-05
1990-10-02
Braun, Leslie A.
Machine element or mechanism
Mechanical movements
Reciprocating or oscillating to or from alternating rotary
74409, 744248R, 92 33, F01B 300
Patent
active
049600079
ABSTRACT:
The fluid-powered actuator having a body, an axially extending rotatable shaft with a plurality of helical grooves, and an annular piston sleeve reciprocally mounted within the body and receiving the shaft therethrough. The piston sleeve has a plurality of radial bores extending fully therethrough with an inward open end adjacent to the grooved shaft. Guide pins are rotatably disposed in each of the pistion sleeve bores and ride in the shaft grooves. An annular carrier is reciprocally mounted within the body coaxial with the piston sleeve and is adjustably axially movable relative thereto. The carrier has a plurality of radial bores extending fully therethrough with an inward end adjacent to the grooved shaft. Guide pins are rotatably disposed in each of the carrier bores and ride the shaft grooves. Rotation of the carrier is prvented is prevented relative to the piston sleeve. An adjustably rotatable collar extends between the piston sleeve and the carrier to selectively set the axial distance between the piston sleeve and collar to eliminate backlash. The collar also serves to limit the radial outward movement of the pins in the bores. Lock nuts are provided to prevent axial movement of the carrier relative to the piston sleeve during fluid-powered operation.
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Mechanisms, Linkages, and Mechanical Controls, by Nicholas P. Chironis; Scientific Library 4/14/82 pp. 188-189.
How to Provide for Backlash, by Clifford T. Bower London, England pp. 188-189.
Moscow Bauman Tech. Coll. Week 84/20 Issued Jun. 27, 1984.
Carter Helical Rod Series, Carter Controls, Inc. Bulletin RA-500 E (Applicant admits this reference is prior art.).
Anchell Scott
Braun Leslie A.
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