Noise Dampening Brake Shoe for a Drum Brake
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United States of America Patent
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Issued Date -
May 25, 2017
app pub date -
Nov 23, 2015
filing date -
Nov 23, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A brake shoe for a drum brake includes a brake table and one or more webs supporting the brake table. One end of each web is pivotally coupled to an associated brake spider and another end of each web responds to a force applied by an actuator that causes the brake shoe to move between positions of engagement and disengagement with an associated braking surface. The brake shoe further includes means for damping movement of the brake shoe, during engagement of the brake shoe with the braking surface, for a natural frequency of the brake shoe having an order of at least two and a causing a bending modal shape of the brake shoe. In one embodiment, the damping means includes a damping plate disposed on one side of a web. A spring acts on a side of the plate opposite the web to urge the plate towards the web.
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