Extraction tool for a shaft of a hip joint prosthesis or of a corresponding rasp
US5674225A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1997 |
| Grant date | Oct 7, 1997 |
| Priority date | — |
| Expiry date | Jan 21, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2002/4628
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The extraction tool comprises a sleeve part (13) which can be coupled to a neck portion (6) of a shaft which is to be withdrawn, and a coupling element (15) in the form of a collet which can be fitted onto the neck portion (6). The collet has an elongate section with wall segments (16a) which can be clamped against the neck portion (6), and comprises fittings (23) which can be guided into a constriction (24) of the neck portion (6), and a head part (17) which projects beyond the neck portion (6), wherein the head part (17) can be clamped against the sleeve part (13) via a bias screw (18). The coupling element (15) is loosely connected to the sleeve part (13) and fitted onto the neck portion (6). It can then be clamped by approaching the bias screw (16) against the sleeve part (13) and against the neck portion (6). A rigid yet easily releasable connection between the extraction tool and the shaft to be withdrawn is thus achieved in a simple manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.