192 clutches and power-stop control – Clutches – Automatic
Patent
1996-06-05
1998-03-03
Pitts, Andrea L.
192 clutches and power-stop control
Clutches
Automatic
192 41A, 188 828, F16D 4107
Patent
active
057225222
ABSTRACT:
An overrunning multiple-row sprag clutch is provided comprising an annular outer race, an inner race positioned concentrically within the outer race to define an annular space therebetween, and two or more discrete annular sprag rows, each having a plurality of discrete sprags, positioned longitudinally adjacent to one another in the annular space. The outer race has a longitudinally varying radial stiffness such that when a torque is applied to the clutch, portions of the outer race radially adjacent to each sprag row are deflected radially outward to compensate for the tiling of the sprags in the sprag row caused by torsional wind up of the inner race, thereby evenly distributing the total torque load between the sprag rows. The variable radial stiffness of the outer race may be provided by an outer race having a tapered outer diameter.
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Zachary S. Henry, NASA Contractor Report 1195479: Bell Helicopter Advanced Rotorcraft Transmission (ART) Program, Jun. 1995, Cover, pp. 25-27, Report Documentation Page.
Declaration of Robert F. Handschuh Regarding NASA-CR-195479 Entitled "Bell Helicopter Advanced Rotorcraft Transmission (ART) Program Final Report," Jul. 8, 1996, pp. 1-3 and Exhibit A.
Bell Helicopter Textron Inc.
Pitts Andrea L.
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