Machine element or mechanism – Mechanical movements – Reciprocating or oscillating to or from alternating rotary
Patent
1978-03-29
1980-10-28
Braun, Leslie
Machine element or mechanism
Mechanical movements
Reciprocating or oscillating to or from alternating rotary
744248NA, F16H 2702, F16H 2902, F16H 2920
Patent
active
042299837
ABSTRACT:
A ball-and-screw power transmission device includes a screw or a threaded rod on which power to be transmitted is applied, an outer cylindrical member disposed around the screw, and at least one ball or spherical member located in contact between the adjacent turns of the thread on the screw and the inner wall surface of the outer cylindrical member, the rotational power being thus transmitted through the ball to the outer cylindrical member as a converted linear power. Means is further provided to restrain behavior of the ball during the inverse-directional and the forward-directional operations of the device relative to the direction of a load for automatically changing a reduction ratio between the two operations.
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Roton Antifriction Bearing Screw, 1958, last page only.
Braun Leslie
France Bed Co. Ltd.
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