Concentric series power springs located in the middle of the spring brake actuator
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United States of America Patent
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Issued Date -
Mar 22, 2007
app pub date -
Sep 20, 2005
filing date -
Sep 20, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A power spring arrangement of a spring-type brake actuator for a vehicle brake, in which the actuator's power spring is located between the service brake actuator and parking brake release actuator, and the power spring comprises a plurality of concentric springs. The power spring is captured between the actuator's intermediate flange and a spring retainer. The use of two or more concentric springs allows higher parking brake actuator force to be generated than with a standard single power spring, without the need to enlarge the actuator housing or to use more costly spring materials or spring configurations.
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