Patent ID: 8602928

Claim:
An isolator comprising: a shaft ( 10 ); a pulley ( 20 ) journalled to the shaft on a first bushing ( 40 ) and a second bushing ( 50 ); a torsion spring ( 30 ) engaged with the shaft and the pulley, the torsion spring exerting an axial contractive force to retain the pulley on the shaft; a cover member ( 60 ) fixed to the shaft, the pulley urged into engagement with the cover member by the torsion spring axial contractive force, the cover member further comprising an axially projecting member ( 62 ) disposed radially outwardly of the torsion spring; the pulley comprising a circumferential pocket ( 24 ) for cooperatively receiving the projecting member and having a stop ( 23 ) disposed within the circumferential pocket; and a rubber member ( 80 ) disposed with the stop for engaging the projecting member.