Patent ID: 9464479
Filing Date: 2016-10-11
CPC Classification: E05D,E05F,E05Y,E06B

Claim Text:
1. An apparatus configured for stopping the descent of a rolling type barrier, comprising: a stator ring having a brake slot; a rotor rotatably and coaxially disposed within the stator ring, wherein the rotor includes at least one stop pawl pivotally attached to the rotor and biased toward the rotor to engage the brake slot when the rotor exceeds a pre-determined rotational velocity such that the at least one stop pawl rotates outward away from the rotor, wherein the at least one stop pawl has a front face defining a first plane perpendicular to the rotor's axis of rotation; and a latch pivotably attached to the stator ring, wherein the latch has a front surface facing the front face of the stop pawl, the front surface defining a second plane parallel to said first plane of the front face of the at least one stop pawl, wherein, in response to the at least one stop pawl entering the brake slot, the latch contacts the at least one stop pawl and secures the pawl in the brake slot; wherein the latch engages an axial protrusion on the stop pawl, the axial protrusion extending from the front face of the stop pawl in a direction non-parallel relative to the first plane.