Devices for converting rotary movement to linear movement
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United States of America Patent
Stats
-
Feb 2, 1988
Grant Date -
N/A
app pub date -
Jan 15, 1986
filing date -
Feb 14, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device for convering rotary to linear motion is composed of at least one ring surrounding a shaft or tube with balls running in a part-helical track in the ring or shaft. The balls are radially pre-loaded and a slot intersects the end and the start of the track to provide punctiform ball contact zones. One ball is then transferred at a time free of load from the end to the start of the track as the ring rotates. Side covers have profiles on their inner surfaces to control laterally the ball being transferred.
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