Surgical instrument with means to display torque and torsional angle
US6591698B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1999 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | Jul 21, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C1/186
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A surgical instrument (12) includes a tool for screwing in a surgical implant or for cutting a thread in human bone tissue with thread tap. Also included is a unit (2) for supplying power and controlling the speed of an electric motor included in the tool, for example a d.c. motor (1). Detection members (7, 8) transmit signals (i1), dependent on the torque of the tool, to display members which comprise a computer unit (9) with screen (10). Displayed on the screen is a curve which shows the torque in relation to the torsional angle position. A curve or curves displayed in this way form(s) the basis for assessing the quality of the implant or of the bone tissue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.