Rotating drive magnetically coupled for producing linear motion

Details Rotating drive magnetically coupled for producing linear motion Rotating drive magnetically coupled for producing linear motion

1992-09-28

1994-07-26

Lorence, Richard M.

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

744248R, 74441, 384446, F16H 2520

Patent

active

053318617

ABSTRACT:
A rotatable drive mechanism for producing linear motion of an object includes driving and driven members, one of which is elongated, and which act cooperatively through frictional engagement to produce longitudinal motion of the driven member. It also includes a magnetic coupling having at least first and second magnetizable members with mutually facing flat annular surfaces, a set of balls disposed in a generally annular arrangement between those flat surfaces, and magnetic means attracting the magnetizable members to each other. Respective ends of the magnetic coupling are fixedly secured to the driven member and to the object, respectively. Since the elements of the magnetic coupling, in and of themselves, would permit relative rotation of parts, which is undesired, provision is also made for restraining the undesired rotation of any part of the magnetic coupling. In a particular embodiment a second magnetic coupling, without balls between magnetizable members, is also used in opposing relation to the first coupling.

REFERENCES:
patent: 3011842 (1961-12-01), Norris
patent: 3016274 (1962-01-01), Norris
patent: 3974706 (1976-08-01), Danko, Jr.
patent: 4131029 (1978-12-01), Harbaugh et al.
patent: 4372223 (1983-02-01), Iwatani
patent: 4597303 (1986-07-01), Nakaya
patent: 4779473 (1988-10-01), Grady et al.

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