US 11,872,383 B2
Flexible shaft structure insulating wear particles by perfusion
Qiwen Zheng, Shanghai (CN); and Zhirong Tang, Shanghai (CN)
Assigned to FORQALY MEDICAL(SHANGHAI) CO., LTD., Shanghai (CN)
Filed by FORQALY MEDICAL(SHANGHAI) CO., LTD., Shanghai (CN)
Filed on Oct. 23, 2020, as Appl. No. 17/078,841.
Application 17/078,841 is a continuation of application No. PCT/CN2020/089427, filed on May 9, 2020.
Claims priority of application No. 201910985742.7 (CN), filed on Oct. 17, 2019.
Prior Publication US 2021/0113752 A1, Apr. 22, 2021
Int. Cl. A61M 60/408 (2021.01); F16C 1/24 (2006.01); A61M 60/857 (2021.01)
CPC A61M 60/408 (2021.01) [A61M 60/857 (2021.01); F16C 1/24 (2013.01); A61M 2205/366 (2013.01); A61M 2205/3606 (2013.01); A61M 2205/3633 (2013.01); A61M 2205/42 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A flexible shaft structure insulating wear particles by perfusion, comprising a flexible transmission shaft (1), a proximal holder (8) being provided at one end of the flexible transmission shaft (1), and a distal holder (9) being provided at the other end of the flexible transmission shaft (1), wherein a constraint insulator and an outer sheath tube (5) are provided outside the flexible transmission shaft (1), and the constraint insulator sequentially comprises an inner constraint layer (2), an insulation layer (3) and an outer constraint layer (4) from inside to outside;
a perfusion inflow annular cavity (7) is located between the outer constraint layer (4) and the outer sheath tube (5) and between the outer constraint layer (4) and the insulation layer (3), respectively, and a static sealed inner cavity (6) is located between the inner constraint layer (2) and the insulation layer (3) and between the inner constraint layer (2) and the flexible transmission shaft (1), respectively;
the proximal holder (8) is provided with a perfusion inlet pipeline (11) communicated with the perfusion inflow annular cavity (7) and a perfusion exhaust pipeline (12) communicated with the static sealed inner cavity (6); and
the distal holder (9) is provided with a perfusion insulation cavity (10) through which the flexible transmission shaft (1) passes.