US 12,221,207 B2
Inner member for main rotor centrifugal force bearing
Amarjit Kizhakkepat, Fort Worth, TX (US); and Mark Adam Wiinikka, Hurst, TX (US)
Assigned to Textron Innovations Inc., Providence, RI (US)
Filed by Textron Innovations Inc., Providence, RI (US)
Filed on Jul. 6, 2023, as Appl. No. 18/347,737.
Prior Publication US 2025/0010982 A1, Jan. 9, 2025
Int. Cl. B64C 27/37 (2006.01); B64C 27/35 (2006.01)
CPC B64C 27/37 (2013.01) [B64C 27/35 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A back-to-back spherical bearing, comprising:
a spherical bearing member having an interior cavity and a spherical bearing surface defining a bearing focal point; and
a first elastomeric and a second elastomeric bonded to the spherical bearing surface on opposite sides of the bearing focal point;
wherein a distance from the bearing focal point to any point on the spherical bearing surface is identical;
wherein the spherical bearing member has a first opening and a second opening formed opposite each other in the spherical bearing surface into the interior cavity;
wherein the first opening, the interior cavity, and the second opening form a throughbore.