Filling apparatus for bone cement
US5954728A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1998 |
| Grant date | Sep 21, 1999 |
| Priority date | — |
| Expiry date | Mar 30, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2250/0091
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention shows a filling apparatus for the introduction of bone cement into the intramedullary cavity of a bone, preferably into the cavity of a femur bone. The apparatus has a filling cannula, at the end of which a rubber sleeve in the form of a sheet metal bell is fastened which projects with its movable part radially beyond the diameter of the filling cannula and axially beyond a lowermost outlet aperture of the filling cannula. Because the sleeve is executed in the lower expandable part with a thickness 1 mm<s<2 mm and is fastened above an uppermost outlet aperture of the filling cannula at a distance 3 mm<1<50 mm and projects with its lower edge beyond a lowermost deflection edge 11a of a lower outlet aperture by a distance 5 mm<a<50 mm, its cross-section adapts to the cavity wall when being introduced without getting caught up and seals it during the expulsion of the bone cement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.