US 11,655,020 B2
Non rotationally constrained friction damper for drive shaft
Emmett Emile Menair, Fort Worth, TX (US)
Assigned to LOCKHEED MARTIN CORPORATION, Bethesda, MD (US)
Filed by LOCKHEED MARTIN CORPORATION, Bethesda, MD (US)
Filed on Feb. 8, 2019, as Appl. No. 16/271,298.
Prior Publication US 2020/0255131 A1, Aug. 13, 2020
Int. Cl. B64C 27/00 (2006.01); F16F 15/12 (2006.01); B64C 27/10 (2023.01); B64C 39/02 (2023.01); F16F 15/00 (2006.01)
CPC B64C 27/001 (2013.01) [F16F 15/1201 (2013.01); B64C 27/10 (2013.01); B64C 39/024 (2013.01); B64C 2201/024 (2013.01); B64C 2201/108 (2013.01); B64C 2201/141 (2013.01); F16F 15/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A damper assembly for reducing vibration in a rotating shaft, the damper assembly comprising:
a damper element having a thickness and a damper opening shaped to surround the shaft;
a first plate having a first opening shaped to surround the shaft and a recess receptive to the damper element, wherein the recess has a height that is greater than the thickness of the damper element; and
a second plate having a second opening shaped to surround the shaft and secured to the first plate to close the recess and retain the damper element between the first plate and second plate,
wherein the damper element is rotatable without rotational constraint within the recess of the first plate.