Ball screw rotary actuator

Details Ball screw rotary actuator Ball screw rotary actuator

1987-12-22

1990-08-07

Braun, Leslie A.

Machine element or mechanism

Mechanical movements

Reciprocating to or from oscillating

92 31, 92 33, 244 78, 244213, B64C 1336

Patent

active

049457799

ABSTRACT:
A linear to rotary ball screw actuator which includes both helical grooves and straight grooves longitudinally spaced apart on the outer surface of the shaft. Matching helical grooves and straight grooves are formed on opposed inner surfaces of first and second portions of relatively moveable housing to provide passageways filled with balls. A return passageway is provided through the housing by way of a straight bore parallel to the longitudinal axis of the shaft.
Also disclosed is a ball screw rotary actuator of the type above described but having an additional section including either straight or helical grooves thereby to define an actuator having either a central helically grooved portion sandwiched between straight grooved portions or alternatively a central straight grooved portion with helical grooved portions on either side thereof.

REFERENCES:
patent: 3255806 (1966-06-01), Meyer et al.
patent: 3393610 (1968-07-01), Aarvold
patent: 4134329 (1979-01-01), Belliere
patent: 4313367 (1982-02-01), Weyer
patent: 4691582 (1987-09-01), Weyer
patent: 4738415 (1988-04-01), Weyer
patent: 4745847 (1988-05-01), Voss

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