Coil spring for overrunning spring clutches

  • US 5,749,449 A
  • Filed: 12/16/1996
  • Issued: 05/12/1998
  • Est. Priority Date: 12/16/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A coil spring (50) including teaser coils (52) disposed at each end thereof, central coils (54) disposed intermediate the teaser coils (52), and transition coils (56) disposed between and adjoining the teaser coils (52) and the central coils (54), the coil spring (50) operative for use in an overrunning spring clutch assembly having a central arbor (16) for centering and supporting the coil spring (50) in an overrunning operating mode, the central arbor (16) having an external bearing surface (16ES) corresponding to each of the transition coils (56), the coil spring (50) being characterized by:

  • each of said transition coils (56) defining an interface surface (56IS), said interface surface (56IS) being substantially complementary to the corresponding external bearing surface (16ES) of the central arbor (16) for limiting radial deflection of said transition coils (56) in the overrunning operating mode.

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