Magnetorheological (MR) piston ring and MR damper having same
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United States of America Patent
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Jul 23, 2013
Grant Date -
Jun 7, 2012
app pub date -
Feb 14, 2012
filing date -
Oct 9, 2007
priority date (Note) -
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Abstract
A magnetorheological (MR) piston ring includes an MR-piston-ring body disposable within a cylinder of an MR damper along a central longitudinal axis. The MR-piston-ring body has a radially inner surface defining a boundary of a longitudinally-extending MR passageway. The MR-piston-ring body includes a surface portion which is slidingly engagable with the cylinder and which has first and second longitudinal ends. The surface portion includes at least one surface groove each defining a secondary MR passageway and extending between the first and the second longitudinal ends. The surface groove is substantially straight and tilted with respect to a line drawn on the surface portion parallel to the central longitudinal axis. An MR damper including the MR piston ring is also described.
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