Patent ID: 8393451
Filing Date: 2013-03-12
Classification: F16D

Abstract:
1. A rotational coupling device, comprising: a rotor coupled to an input shaft for rotation therewith, said input shaft disposed about a rotational axis and said rotor defining a first clutch engagement surface; a field shell disposed about said input shaft and fixed against rotation; an electrical conductor disposed within said field shell on a first side of said rotor; a brake plate spaced axially from and coupled to said field shell, said brake plate defining a first brake engagement surface; an armature disposed axially between said rotor and said brake plate on a second side of said rotor opposite said conductor, said armature coupled to an output member and defining a second clutch engagement surface facing and a second brake engagement surface; a permanent magnet coupled to one of said brake plate and said armature, said magnet urging said armature into engagement with said brake plate; and, an adjustable spacer disposed between said brake plate and said field shell, adjustment of said spacer permitting movement of said brake plate towards said field shell to compensate for wear on at least one of said first clutch engagement surface, said second clutch engagement surface, said first brake engagement surface and said second brake engagement surface wherein said adjustable spacer comprises a compressible body.