Axially stiff link
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United States of America Patent
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-
Dec 16, 1997
Grant Date -
N/A
app pub date -
May 2, 1995
filing date -
Jul 6, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The axially stiff link provides a rigid connection linking two shaft segments (1, 2) of a shaft such that it can bend and or twist yet remain rigid with no slop for high tolerance positioning applications. The link is composed of two rolling elements (4) attached to the shaft segments (1, 2) having a rolling line contact (10) with each other. The rolling elements (4) are held together and preloaded by a ring spring (6) which encircles a portion of the rolling element extending transversely from the shaft segment and engages it by rolling line contact (8). The rolling elements may be solid plain curved portions of the shaft ends, a cylindrical bar, cylindrical bar pairs, or conical pairs to provide for torsional as well as axial bending in the link. Closely spaced perpendicularly disposed axial links provide for 2 axis bending of the shaft.
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