Orthopaedic fracture fixation apparatus
US4693240A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1985 |
| Grant date | Sep 15, 1987 |
| Priority date | — |
| Expiry date | Apr 12, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/7041
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A bone pin clamp for external fracture fixation apparatus comprises rotation, slide and housing elements (240, 220, 210) nested one within the next, each such element being apertured to receive a pin (100) therethrough, and the rotation and slide elements respectively affording pin adjustment in azimuth and zenith, and in height, relative to the housing element, and a locking mechanism (60, 80, 170) including a common actuator member (60) operable simultaneously to lock the pin and rotation and slide elements in the housing element. In a preferred form the housing element serves as a cylinder with the slide element as a keyed piston therein, and the rotation element is a disc located between a screw (60) and annular thrust members (80, 170) engaged in the piston, the piston and disc being split respectively to lock by expansion and compaction under screw action towards the thrust members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.