Patent ID: 7861840
Filing Date: 2011-01-04
Classification: E05F,E05Y,F16D

Abstract:
1. Anti-back drive system comprising: a drive housing includes a drive counterbore, said drive housing is secured to a motor, a drive shaft of the motor extends into said drive counterbore; a drive ring includes a plurality of drive projections, said drive ring is secured to the drive shaft; a lock ring includes a plurality of inward facing projections and a plurality of inward facing cam surfaces; and an output pinion includes a plurality of drive fingers and a drive gear, said plurality of drive fingers extend radially outward from said output pinion, ends of said plurality of drive fingers are sized to be received by said plurality of inward facing cam surfaces, a lip retainer extends from at least one of said plurality of drive fingers, said lip retainer axially retains said lock ring, said output pinion is retained on the drive shaft, wherein at least one of said plurality of drive projections drives at least one of said plurality of drive fingers.