Multiple natural frequency coupling apparatus
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United States of America Patent
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Dec 27, 2016
Grant Date -
Oct 8, 2015
app pub date -
Apr 3, 2014
filing date -
Apr 3, 2014
priority date (Note) -
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Abstract
A multiple natural frequency coupling apparatus for connecting a rotatable driving member to a rotatable driven member of a drive line. The coupling apparatus of the present invention provides a substantially cylindrical housing having a longitudinal axis with a substantially cylindrical outer shaft coaxially aligned with and connected to the housing. A substantially cylindrical inner shaft is coaxially aligned with the outer shaft and the housing. A substantially cylindrical chuck housing is coaxially aligned with the housing, the outer shaft, and the inner shaft wherein the fluid chuck housing is connected to the inner shaft. A substantially cylindrical collapsible sleeve is coaxially aligned with and between the fluid chuck housing and the outer shaft, wherein the collapsible sleeve may move between a non-actuated position, wherein the collapsible sleeve does not engage the outer shaft thereby providing the coupling apparatus with a first torsional stiffness corresponding to a first natural frequency, and an actuated position, wherein the collapsible sleeve engages the outer shaft thereby providing the coupling apparatus with a second torsional stiffness corresponding to a second natural frequency.
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