Mechanical drive assembly incorporating counter-spring biased, radially-adjustable rollers
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United States of America Patent
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-
Jan 19, 1999
Issued Date -
N/A
app pub date -
Nov 8, 1996
filing date -
Jul 5, 1995
priority date (Note) -
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Abstract
An anti-friction nut for engagement with an elongate shaft-like member having a groove with opposed walls. The nut body has an axial bore which is adapted to receive the shaft-like member, and a radial bore communicating with the axial bore. The radial bore carries an anti-friction roller mounted by means of two back-to-back ball bearing assemblages. A nose portion of the roller extends into the axial bore and engages one wall of the groove of the shaft-like member. There is a spring in the radial bore which engages the outer race of the inner ball bearing assemblage, and effectively biases the roller in a radially outward direction, away from the shaft-like member. A threaded adjustment plug in the bore engages the outer race of the outermost ball bearing assemblage, to effect adjustable movement of the roller in radial directions, against the action of the spring. Reduced looseness and backlash are realized.
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