FAILSAFE BRAKE FOR COUNTERWEIGHT ARBORS/COUNTERWEIGHT ASSISTED THEATRICAL RIGGING SYSTEMS
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United States of America Patent
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N/A
Issued Date -
Oct 4, 2007
app pub date -
Feb 20, 2007
filing date -
Feb 17, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A failsafe brake is provided for preventing the uncontrolled descent of a counterweight arbor or stage equipment load in a counterweight rigging systems. Specifically provided is a failsafe brake according to which a brake shoe is biased to contact a counterweight arbor guide rail and grip it between the brake shoe and a backer plate, except when tension is applied to a line to move the counterweight arbor.
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