Patent ID: 9702402
Date: 2017-07-11
CPC Classifications: B64C,F16C,Y10T

Claim:
1. A rotary system, comprising: a yoke arm having an upper surface and a lower surface; a rotor blade; a first bearing carried by the yoke arm and configured to pivotally secure the rotor blade to the yoke arm and to allow feathering movement of the rotor blade relative to the yoke arm during flight, the first bearing comprising: a housing, having: a first cutout and a second cutout extending inwardly in the housing and from a top surface of the housing; a third cutout and a fourth cutout extending inwardly in the housing and from a bottom surface of the housing; wherein the first, second, third, and fourth cutouts are each discrete; a spherical ball rotatably carried within the housing and having a thickness that does not extend beyond the upper and lower surfaces of the yoke arm; and a passage extending through the spherical ball and configured to couple with a first attachment means associated with the rotor blade configured to secure the rotor blade to the yoke arm; wherein the first cutout is positioned directly above the third cutout and the second cutout is positioned directly above the fourth cutout; wherein the first cutout and the fourth cutout allow the first attachment means to pivot only in a first feathering direction; and wherein the second cutout and the third cutout allow the first attachment means to pivot only in a second feathering direction; and a second bearing carried by the yoke arm and configured to pivotally secure the rotor blade to the yoke arm and to allow feathering movement of the rotor blade relative to the yoke arm during flight.