Cam-actuated centrifugal brake for preventing backspin
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United States of America Patent
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May 12, 2015
Grant Date -
Dec 4, 2008
app pub date -
Dec 14, 2006
filing date -
Dec 14, 2005
priority date (Note) -
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Abstract
A cam assisted centrifugal brake or clutch system provides increased mechanical advantage to improve the output torque relative to prior art devices such as leading brake shoes. The brake or clutch engagement is cammed radially outwardly to engage a brake housing in one direction and guided to a disengaged position in the other direction. Centrifugal forces retain the brake in the disengaged position. Embodiments of the present invention are applied as a backspin braking system that is incorporated into a drive head for a progressing cavity pump drive system.
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