Patent · US Active

Dental handpiece

US12161516B2 · kind B2 · utility

1Cited by

2References

7Claims

0Family size

Assignee

Beyes Dental Canada Inc. · CA

Inventors

Hua Yang · Xi'an, CN
Min Li · Nanhu, CN
Changming Chen · Tangxia, CN

Key dates

Filing date	Aug 5, 2021
Grant date	Dec 10, 2024
Priority date	—
Expiry date	Jan 22, 2043

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61C1/141
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A dental handpiece includes a barrel, an air turbine, a central shaft, a bearing and a seal. The barrel includes an axial open end. The air turbine is rotatably provided in the barrel. The central shaft is secured to the air turbine to rotate with the air turbine. The bearing is mounted in the barrel and supports the central shaft for rotation. The seal is trumpet-shaped and arranged between the open end of the barrel and the bearing. The seal includes a sealing portion sleeved over an outer cylindrical surface of the central shaft. The sealing portion is deformable to separate from the outer cylindrical surface of the central shaft or closely contact the outer cylindrical surface of the central shaft depending on a pressure difference between interior and exterior of the barrel.

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