Brake actuator apparatus for shielding and centering
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United States of America Patent
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Feb 27, 2018
Grant Date -
Feb 8, 2018
app pub date -
Aug 3, 2016
filing date -
Aug 3, 2016
priority date (Note) -
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Abstract
A brake actuator comprises a housing having an end wall and a pushrod projecting through an opening in the end wall and terminating at a movable plate in the housing. A spring is enclosed in the housing and surrounds the pushrod. At least one unitary resilient member is disposed on the push rod proximate to the end wall and partially extends through the opening for centering the spring around an axis of the pushrod and restricting contamination into the housing. The unitary resilient member comprises a central aperture and an annular flange surrounding the central aperture. At least one section of a collar radially outward from the annular flange has a thickness less than half of the annular flange thickness for constraining movement of the spring and the push rod in a radial direction.
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