US 11,859,665 B2
Drive shafts made of composite materials and methods of making such shafts
Mark R. Gurvich, Middletown, CT (US); Brayton Reed, Rome, NY (US); Joyel M. Schaefer, Earlville, NY (US); Michael King, Sauquoit, NY (US); and Kevin Thomas Gryk, Marcy, NY (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Oct. 17, 2019, as Appl. No. 16/655,722.
Prior Publication US 2021/0115965 A1, Apr. 22, 2021
Int. Cl. F16C 3/02 (2006.01); B29C 70/74 (2006.01); B29L 31/00 (2006.01)
CPC F16C 3/026 (2013.01) [B29C 70/74 (2013.01); B29L 2031/75 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A drive shaft comprising:
a tubular member extending between axial ends and being hollow, said tubular member formed of a thermoplastic matrix with embedded fibers;
at least one ring member secured radially of said tubular member; and
wherein a bending stiffness of the at least one ring member in a hoop direction is at least twice as high as a bending stiffness of said tubular member in the hoop direction given the same width as said ring member.