Surgical tool
US5139508A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1991 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | Nov 20, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/32053
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A surgical tool for forming a circular opening through the skin which is of smaller diameter at the outer skin surface than at the inner surface of the skin employs a trephine having a circular cutting edge. The trephine is inserted into a pocket surgically formed beneath the skin with its cutting surface facing the skin. A rod member is then inserted through the skin and threaded into the trephine. The rod member is attached to a spring biassed plunger within a tool housing which is released from a ready position by withdrawal of a locking pin. Upon release of the plunger, the spring drives the plunger to drive the cutting edge of the trephine outwardly through the skin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.