Brake actuator
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
May 31, 1994
Grant Date -
N/A
app pub date -
Oct 26, 1990
filing date -
Nov 4, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A brake actuator has a housing containing tappets operable by a cam to apply brake shoes against a rotary brake drum. The housing defines a cavity to which lubricant is admitted. A flexible element which is not compressed at the maximum positive system lubricant pressure and is disposed within the cavity and subject to lubricant pressure. The element is movable during outward movement of the tappets to compensate for any increase in volume of the cavity caused by tappet outward movement. This avoids the occurrence of negative pressure in the cavity.
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