Patent · US Active

Dental hand piece or angle piece with a rotating tool

US11448260B2 · kind B2 · utility

0Cited by

4References

6Claims

0Family size

Assignee

Dentsply Sirona Inc. · US

Inventors

Metin Ertugrul · Rödermark, DE
Matthias Rein · Roßdorf, DE
Jan-Paul Schermuly · Darmstadt, DE
Ralf Sutter · Weinheim, DE

Key dates

Filing date	Jun 7, 2018
Grant date	Sep 20, 2022
Priority date	—
Expiry date	Jun 7, 2038

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16C2352/00
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A dental hand piece or angle piece including a rotating tool, which is driven via a rotating drive element disposed in a housing, wherein the rotating drive element is mounted in the housing by a radial rolling bearing, wherein the rolling bearing comprises an axial abutment surface and the housing comprises an axial countersurface, and wherein the rolling bearing is axially preloaded with respect to the housing by a spring element 11 and has a coefficient of friction for the static friction of the abutment surface to the countersurface or the abutment surface and the countersurface to the spring element that is at least 0.16 in the lubricated state and at least 0.25 in the unlubricated state.

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