Medical instrument for removing bone
US4733663A · kind A · utility
Inventor
Key dates
| Filing date | Jul 2, 1986 |
| Grant date | Mar 29, 1988 |
| Priority date | — |
| Expiry date | Jul 2, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/32
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
There is provided an improved rongeur having a jaw mechanism comprised of a barrel member having a honed cutting edge on one extremity thereof and having a shaft member located within and arranged for reciprocal motion. On the shaft member there is provided a plate member attached at one extremity to trap bone against the cutting edge. A lever mechanism is provided having paired handle levers joined by a pivot and having the barrel and shaft member attached to the handle levers between the handle portion and the pivot. On the shaft member there is further provided a cavity arranged to slide within the barrel progressively as the cutting operation proceeds, gradually drawing severed bone within the capturing cavity. Stop surfaces are located in the cutting area at a position relative to the cutting edge to avoid direct force contact on the cutting edge when the shaft member is reciprocated to its full extent within the barrel member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.