Clutch/brake having rectangular-area-contact 3D locking sprags

Details Clutch/brake having rectangular-area-contact 3D locking sprags Clutch/brake having rectangular-area-contact 3D locking sprags

1994-07-22

1996-05-21

Pitts, Andrea L.

192 clutches and power-stop control

Clutches

Automatic

192 431, 188 8277, F16D 4106

Patent

active

055180949

ABSTRACT:
A clutch or brake device has locking sprags engageable between its inner and outer races which have a three-dimensional wedge shape with respect to the rotational (Z) axis. The 3D locking sprags have contact surfaces shaped to make rectangular area contact with the corresponding surfaces of the inner and outer races for reduction and improved distribution of contact stresses. The 3D sprags are also shaped with a constant-angle contact surface in cross-section in a plane normal to the Z-axis for self-compensation with wear and maintenance of effective locking angles under loads.

REFERENCES:
patent: 3326342 (1967-06-01), Hack
patent: 3978950 (1976-09-01), Timtner
patent: 4819775 (1989-04-01), Witt et al.
patent: 5275261 (1994-01-01), Vranish

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