Spring set brake
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United States of America Patent
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-
Apr 15, 1997
Grant Date -
N/A
app pub date -
Aug 1, 1994
filing date -
Aug 1, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The magnetic air gap in a spring set brake, SSB, is set independently of the length of the legs spacing the pressure plate from the pole face which controls the axial travel length of the armature between a released position engaging the pole face and a braking position pushing a friction disc against the pressure plate. The legs have radially inwardly facing mounting surfaces engaging and retaining the pressure plate. The legs have axially extending line contact guide surfaces for the armature, minimizing magnetic flux leakage through the legs to the armature, and instead concentrating magnetic flux at the pole face to maximize magnetic force attracting the armature. An injection molded friction disc is provided, as well as a keyed hubless design. A manual release mechanism is also provided. An energization coil is provided enabling simplified connection lead bonding.
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