Adaptor for mounting a prosthesis

Inventors

Beerens, Maikel Michael Adrianus • Jansen, Harry Christiaan Antoon

Assignees

Xilloc Holding BV

Abstract

The present invention relates to an adaptor for mounting a prosthesis to a prosthetic pin that protrudes from a user's body. The adaptor comprises a male part coupled to a prosthetic pin, a female part coupled to the prosthesis and to the male part, and a locking ring for locking a rotation of the male part relative to the female part. According to the invention, the female part further comprises an at least partially resilient bush arranged in the female part that is configured to expand in a radial direction when the bush is compressed in an axial direction to lock a rotation of the male part relative to the female part.

Core Innovation

The invention relates to an osseointegration prosthesis adaptor for mounting a prosthesis, comprising a male part configured to be coupled to a prosthetic pin and a female part configured to be coupled to the prosthesis and to the male part. The female part comprises an elongated cavity in which an at least partially resilient ring assembly is arranged. The resilient ring assembly expands in a radial direction when it is compressed in an axial direction.

A locking ring locks a rotation of the male part relative to the female part by compressing the ring assembly in the axial direction so that the ring assembly expands in the radial direction. In this arrangement, the male part can be arranged in or through the ring assembly. The ring assembly comprises a plurality of first and second rings, where the first rings are made from essentially rigid material and the second rings are made from essentially resilient material.

In embodiments, the locking ring motion is guided to translate locking-ring actuation into axial compression using guiding tracks, with guiding elements on the locking ring guided in a vertical portion and a spiraled circumferential portion. Pushing elements push in an axial direction onto the ring assembly, and a further resilient element may be arranged between the pushing elements and the resilient ring assembly, including wave spring, multi-wave spring, or nested wave spring configurations.

The locking ring can be held against return by a spring-biased locking pin engaging a locking track with an open portion and blocked positions, providing a first/second position behavior for rotational locking and damping while allowing the male part to slip and be re-aligned after excessive torque.

Claims Coverage

The independent claims identify four inventive features that combine a male part coupled to a prosthetic pin, a female part with an elongated cavity containing an at least partially resilient ring assembly that radially expands under axial compression, a locking ring that compresses the ring assembly to lock rotational movement of the male part relative to the female part, and a ring assembly with essentially rigid first rings and essentially resilient second rings.

Across the independent claim coverage, the core structure is an adaptor with a male part and a female part having an elongated cavity, an at-least-partially resilient ring assembly that expands radially when axially compressed, and a locking ring that performs the axial compression to lock rotational movement; the independent claim further defines the ring assembly as a plurality of essentially rigid first rings and essentially resilient second rings.

Stated Advantages

Documented Applications