Pump having an electromagnetic clutch system
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United States of America Patent
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May 6, 2014
Grant Date -
Jan 26, 2012
app pub date -
Nov 18, 2008
filing date -
Nov 18, 2008
priority date (Note) -
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Abstract
A water pump includes a housing, a pumping mechanism, and a pulley that receives an input torque. Rotation of a clutch disk provides a rotational force to the pumping mechanism. A ferromagnetic clutch ring rotates in unison with the pulley. The clutch ring moves between a disengaged position and an engaged position to selectively rotate the clutch disk in response to the input torque. A magnet disposed on the clutch disk attracts the clutch ring toward the engaged position, and an electromagnetic coil is operable to selectively diminish the attraction of the clutch ring to the magnet to move the clutch ring between the engaged and disengaged positions.
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