JPWO2020135088A5

JPWO2020135088A5 -

Info

Publication number: JPWO2020135088A5
Application number: JP2021538151A
Authority: JP
Publication date: 2022-12-21
Anticipated expiration: 2039-12-13

Claims

An elastomeric seal was positioned at the wear zone between implant components that were relatively movable and subject to wear, and an outlet for implant wear debris was formed by said elastomeric seal and said implant component. always sealed within the sealing area to prevent said wear debris from diffusing outward;
The elastomeric seal includes at least one flexible cushioning portion to reduce or completely offset relative motion between the implant components, thereby reducing the elastomeric seal resulting from the relative motion between portions. A method of limiting the spread of wear debris of an in vivo implant that further reduces wear of the sealing portion of the seal.

2. The method of limiting wear debris diffusion of an in vivo implant according to claim 1, wherein the cushioning portion of the elastomeric seal is positioned at the wear debris exit of the implant.

3. The method of limiting wear debris diffusion of an in vivo implant according to claim 2, wherein said flexible cushioning portion is the elastic deformation volume of the elastic sealing component itself and/or an additional axial retractable structure.

including an implant formed by inserting and mating an internal component and an external component;
relative movement of the internal and external components may produce wear debris;
wherein the wear debris outlet of the implant is located in a port of the outer component cooperatively coupled to the inner component;
an elastomeric seal disposed in an interfitting segment of the inner component and the outer component;
one portion of the elastomeric seal is rigidly attached to the outer surface of the internal component ; and
The other portion of the elastomeric seal is rigidly attached and connected to the external component such that the elastomeric seal, the internal component and the external component form a sealing area enclosing the outlet of the wear debris. and a flexible cushioning portion disposed between a sealing location on said internal component and a sealing location on said external component, functioning to limit wear debris.

said elastomeric seal having a unitary construction;
the elastomeric seal is connected to an inner surface of the external component;
the inner bore of the elastomeric seal is conical, the elastomeric seal is flange-shaped,
an inner wall of the small end of the elastomeric seal rigidly attached to the internal component to form a seal, the elastomeric seal being movable relative to the internal component;
an inner wall of a projection at the big end of the elastomeric seal and the internal component form the flexible cushioning portion with a clearance fit, and
5. The in-vivo implant device with wear debris limiting function of claim 4, wherein the projection at the big end of the elastomeric seal is clamped in a bore of the external component in a locking manner.

said big end of said elastomeric seal being relayed and connected to an inner bore of said outer component by a fixture having a through hole for inserting and installing said inner component;
one end of the fixture has a multi-valve arrow shape and is inserted and connected to the external component by pressurization;
the other end of the fixture providing an annular notch therein having a larger diameter than the through hole;
an end head of the projection at the big end of the elastomeric seal clampingly secured to the annular notch;
two axial end faces of the end head of the projection at the big end are in an interference fit with the annular notch; and
6. The in-vivo implant device with wear debris limiting feature of claim 5, wherein the radial outer wall surface is in a clearance fit with the annular notch.

7. The wear debris of claim 6, wherein the fixture is made of a medical metal material that can be used in vivo or an implant material selected from the group consisting of polyethylene, PU, and PEEK. An in vivo implant device with restrictive functionality.

The elastomeric seal has a unitary structure, the elastomeric seal is connected to the outer surface of the outer component , and the two ends of the inner bore of the elastomeric seal are respectively connected to the inner wall to form a seal. rigidly attached to an outer wall of a component and to an outer wall of said outer component, said elastomeric seal being movable with respect to said inner component or said outer component, said elastomeric seal at different outer diameters; 5. The in-vivo implant device with wear debris limiting function according to claim 4, comprising said flexible cushioning portions spanning variable diameter segments of said internal and said external components.

9. The in-vivo implant device with wear debris limiting feature of claim 8, wherein said elastomeric seal and said outer wall of said external component are secured by a clamping fixation with a projection.

A rigid mounting force for effecting a seal between the elastomeric seal and the internal component is provided by an accessory sleeve formed on the outer wall of the elastomeric seal, and the accessory is radially 9. The in-vivo implant device with wear debris limiting function of claim 5 or 8, wherein the elastomeric seal is tensioned from the outside to the inside at .

A non-rigid structure is connected between the accessory and the external component to prevent the attachment from being pulled out, the non-rigid structure being in a predetermined loose state and the external component. 11. The in-vivo implant device with wear debris limiting feature of claim 10, wherein motion is not transmitted to said elastomeric seal through said non-rigid structure.

said elastomeric seal having a split structure and comprising three parts: said flexible cushioning portion, a sealing ring and a ferrule, wherein an inner ring of said sealing ring rigidly forms a sleeve over said internal component; The outer race of the sealing ring is rigidly fixed to the ferrule, the outer race of the sealing ring and the ferrule cannot move relative to each other, and one end of the flexible buffer portion is fixed to the ferrule. 5. The in-vivo implant device with wear debris limiting function of claim 4, wherein the in-vivo implant device with wear debris limiting function is connected at its other end fixedly to an end head of said external component.

the axial length of the ferrule is longer than the axial length of the sealing ring;
an annular slot is provided in the ferrule; and
13. The in-vivo implant device with wear debris limiting function of claim 12 , wherein said sealing ring is clamped in said annular slot in a fixed manner.

14. An in-vivo implant device with the function of limiting wear debris according to any one of claims 5, 8 and 13, wherein said cushioning portion is an elastic smooth surface or a retractable and foldable concave-convex surface. .

14. A wear according to any one of claims 5, 8 and 13, wherein a number of micropores are evenly distributed on said elastomeric seal in order to balance the pressure inside and outside said seal. An in-vivo implant device with debris-restricting functionality.