Coil spring for overrunning spring clutches

Details Coil spring for overrunning spring clutches Coil spring for overrunning spring clutches

1996-12-16

1998-05-12

Bonck, Rodney H.

192 clutches and power-stop control

Clutches

Automatic

192 74, F16D 1312

Patent

active

057494495

ABSTRACT:
A coil spring (50) 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 coil spring (50) includes 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) is characterized by each of the transition coils (56) having an interface surface (56.sub.IS) being substantially complementary to a corresponding external bearing surface (16.sub.ES) defined by the central arbor (16) of the spring clutch assembly. Such substantially complementary relationship limits the radial deflection of the transition coils (56) in the overrunning operating mode, thereby reducing vibratory bending stresses in the coil spring (50).

REFERENCES:
patent: 1836199 (1931-12-01), Starkey
patent: 1932000 (1933-10-01), Starkey
patent: 1953370 (1934-04-01), Starkey
patent: 2336757 (1943-12-01), Starkey
patent: 4570318 (1986-02-01), Kish
patent: 4690390 (1987-09-01), Kish
patent: 4926991 (1990-05-01), Stone et al.
patent: 4934499 (1990-06-01), Kish
patent: 4938333 (1990-07-01), Kish

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