Patent ID: 9505490
Filing Date: 2016-11-29
CPC Classification: B64C

Claim Text:
1. A hub system comprising: at least one race-track style yoke having an annular shape and comprising a mast section, an outboard section, and a flexure section extending between the mast section and the outboard section, the at least one race-track style yoke comprising a first race-track style yoke and a second race-track style yoke; at least one shear bearing; and at least one mast adapter comprising a plurality of mast adapter arms configured to attach to and support the at least one race-track style yoke and directly attach to and support the at least one shear bearing, the plurality of mast adapter arms comprising a first set of opposing arms extending from an intermediate member of the mast adapter and a second set of opposing arms extending from the intermediate member, the intermediate member comprising a cylindrical body having a central mast aperture configured to attach to a rotor mast, the first set of opposing arms attached to the intermediate member at a first end of the intermediate member, and the second set of opposing arms attached to the intermediate member at a second end of the intermediate member such that the first set of opposing arms is physically separate from the second set of opposing arms, the first set of opposing arms connecting to the first race track style yoke, and the second set of opposing arms connecting to the second race track style yoke; wherein the flexure section is free from direct contact from the at least one mast adapter; and wherein the at least one race-track style yoke has a flapping hinge that is non-coincident with a flapping hinge of the at least one shear bearing.