US 12,343,260 B2
Method for limiting diffusion of wear debris of in vivo implant
Kai Li, Taiyuan (CN)
Appl. No. 17/298,663
Filed by Kai Li, Taiyuan (CN)
PCT Filed Dec. 13, 2019, PCT No. PCT/CN2019/124994
§ 371(c)(1), (2) Date May 31, 2021,
PCT Pub. No. WO2020/135088, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 201811603775.2 (CN), filed on Dec. 26, 2018.
Prior Publication US 2022/0015910 A1, Jan. 20, 2022
Int. Cl. A61F 2/30 (2006.01)
CPC A61F 2/30767 (2013.01) [A61F 2002/30685 (2013.01); A61F 2002/30939 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A method for limiting diffusion of wear debris of an in vivo implant, wherein an elastomer seal is arranged at a wearing part between implant components of the implant that can move relatively and generate wear, such that an outlet for wear debris of the implant is always sealed within a sealing area formed by the seal and the implant components, thereby preventing the wear debris from diffusing outwards;
wherein the implant components comprises an inner component and an outer component, wherein the inner component comprises an end slidably received within a complementary axial chamber formed within an end of the outer component, wherein the inner component and the outer component are capable of axially moving relative to each other and capable of generating wear debris from said axial movement, and wherein the outlet for wear debris of the implant is located at a port of the outer component that is cooperatively connected to the inner component;
wherein the elastomer seal comprises a sleeve including an end tightly attached to an outer wall of the inner component in proximity to said port, an opposite end tightly attached to an outer wall of the outer component in proximity to said port, and a flexible buffer part located between said ends of the elastomer seal and positioned at the outlet for wear debris of the implant; the flexible buffer part sized and configured for reducing or completely offsetting relative axial motion stroke between the implant components, thereby further reducing wear of a sealing part of the elastomer seal due to the relative motion between the implant components; the elastomer seal is adapted for sliding relative to the implant components when the flexible buffer part is insufficient to offset an axial motion stroke between the implant components;
wherein the flexible buffer part is an elastic deformation volume and/or an additional axial retractable structure of the elastomer seal; and
wherein the elastomer seal comprises medical silica gel or polyurethane (PU).