US 11,703,105 B2
Friction tubes
Aaron Cooling, Rockford, IL (US); Glenn C. Lemmers, Jr., Loves Park, IL (US); and David S. Behling, Belvidere, IL (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Nov. 16, 2021, as Appl. No. 17/527,663.
Application 17/527,663 is a continuation of application No. 16/953,723, filed on Nov. 20, 2020, granted, now 11,320,022.
Prior Publication US 2022/0163092 A1, May 26, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. F16F 15/129 (2006.01)
CPC F16F 15/129 (2013.01) 15 Claims
OG exemplary drawing
 
1. A torsion shaft assembly comprising:
a torque carrying shaft including a driven end configured for receiving torque input to the torque carrying shaft and a driving end configured for outputting torque output from the toque carrying shaft and from the torsion shaft assembly, wherein the torque carrying shaft includes an axial facing damping interface surface axially between the driven end and the driving end; and
a friction tube disposed outboard of the torque carrying shaft, wherein the friction tube is connected at a first axial location to be driven by the torque carrying shaft, and wherein the friction tube includes an axial facing damping interface surface that abuts the axial facing damping interface surface of the torque carrying shaft, forming a damping interface to provide frictional dampening against angular vibrations occurring as differential angular displacement between the driven end and the driving end of the torque carrying shaft, wherein the friction tube is engaged with drive flats of the toque carrying shaft, wherein the drive flats of the torque carrying shaft are more proximate the driven end of the torque carrying shaft than to the driving end.