Duo-servo drum brake
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United States of America Patent
Stats
-
Mar 28, 1995
Grant Date -
N/A
app pub date -
Jul 8, 1992
filing date -
Jul 9, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a duo-servo drum brake comprising a mechanical expander adjacent a thrust bearing for supporting the brake shoes, with the expander including an operating lever to which is transmitted the operating force of an actuator substantially in a direction tangential to the edge of the brake drum. The brake shoe is movable through an expander in the direction of the operating force and connected to a thrust bearing through a prestressed spring. The spring force of the prestressed spring opposes the expanding force of the expander and exceeds the operating force required for placing the brake shoes in abutment with the brake drum on the operating lever.
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