Patent · US Expired

Dental handpiece

US4251212A · kind A · utility

9Cited by

8References

4Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Rainer Worschischek · Lorsch, DE
Werner Schuss · Heppenheim, DE

Key dates

Filing date	Dec 11, 1979
Grant date	Feb 17, 1981
Priority date	—
Expiry date	Dec 11, 1999

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61C1/185
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A dental handpiece having a first section rotatably mounted on an axis of a drive motor part and supporting a head part at the other end, characterized by the head part being releasably connected to the first section and a rotatable coupling in the cooling lines between the drive motor part and the first section being free from uncoupling when changing the head part to change the drive ratio of the drive train. In addition, the head part has a protective sleeve which surrounds the first section and the rotatable coupling so that the rotatable coupling and first section are not subjected to sterilization with adverse effects to the coupling and to the condition of the lubricant in the various bearings in the drive train.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.