Patent ID: 6470626
Filing Date: 2002-10-29
Classification: E01F

Abstract:
For use with a gate having a horizontally extending barrier arm and an actuator for raising the barrier arm to allow passage through the gate, a release mechanism for attachment between the barrier arm and the actuator and operable when the barrier arm is impacted to allow the barrier arm to swing horizontally and thereby withstand the impact without breaking, the release mechanism comprising:a. opposing, spaced apart brackets for attachment to the actuator; b. a pivotable arm assembly pivoted to said brackets, said pivotable arm assembly comprising a swing plate having a rearward end and a forward end and an elongated arm having a rearward end and a forward end, said forward end of said swing plate being attached to said rearward end of said elongated arm and said rearward end of said swing plate protruding rearwardly beyond said rearward end of said elongated arm, said forward end of said elongated arm extending forwardly beyond said forward end of said swing plate and having a portion to which the barrier arm is attachable; and, c. a detent provided in said rearward end of said swing plate and a spring-loaded plunger engaging said detent to hold said pivotable arm assembly perpendicular with respect to said brackets, said plunger being releasable from said detent upon an impacting force being exerted on said elongated arm to allow said pivotable arm assembly to pivot from said perpendicular relationship with respect to said brackets.