METHODS AND APPARATUS FOR POSITION SENSITIVE SUSPENSION DAMPING
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United States of America Patent
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Issued Date -
Dec 6, 2012
app pub date -
May 31, 2012
filing date -
May 31, 2011
priority date (Note) -
Abandoned
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Abstract
An apparatus and system are disclosed that provide position sensitive suspension damping. A damping unit includes a piston mounted in a fluid-filled cylinder. A vented path in the piston may be fluidly coupled to a bore formed in one end of the piston rod, creating a flow path for fluid to flow from a first side of the piston to a second side of the piston during a compression stroke. The flow path may be blocked by a needle configured to engage the bore as the damping unit is substantially fully compressed, thereby causing the damping rate of the damping unit to increase. In one embodiment, the piston includes multiple bypass flow paths operable during the compression stroke or the rebound stroke of the damping unit. One or more of the bypass flow paths may be restricted by one or more shims mounted on the piston.
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