Title:
ZERO SUCKBACK DEVICES FOR HIGH-SPEED TURBINE DENTAL DRILL HANDPIECE
Document Type and Number:
WIPO Patent Application WO/2017/206298
Kind Code:
A1
Abstract:
Zero suckback devices for a high-speed turbine dental drill handpiece, mounted at two ends of a handpiece head body (1). The device, at one side of the handpiece head body (1) where a bur (3) is mounted, consists of an elastic shaft enclosure (17) with a center being embedded with a metal center skeleton and a non-elastic shaft enclosure (15), and the lip part of the elastic shaft enclosure (17) matches a rotor shaft with a tapered end part. The device, at one side of the handpiece head cover (2) of the handpiece head body, is provided with an O-shaped sealing ring (7) between a button cover body and the handpiece head cover body, and provided with a one-way ball valve at the center of the button cover body. Anti-suckback measures are taken at two sides of the handpiece head body (1), and therefore, a suckback material may be controlled to a state of extremely few or almost zero.
Inventors:
ZHANG FUDONG (CN)
Application Number:
PCT/CN2016/091513
Publication Date:
December 07, 2017
Filing Date:
July 25, 2016
Export Citation:
Assignee:
BEIJING THE ORIENT DOCTOR'S PNEUMATIC TOOLS CO LTD (CN)
International Classes:
A61C1/05
Foreign References:
| CN205795826U | 2016-12-14 | |||
| CN105852990A | 2016-08-17 | |||
| CN105476722A | 2016-04-13 | |||
| CN1887236A | 2007-01-03 | |||
| CN103654975A | 2014-03-26 | |||
| CN205234664U | 2016-05-18 | |||
| EP1025809A2 | 2000-08-09 |
Attorney, Agent or Firm:
BEIJING DIJIN INTELLECTUAL PROPERTY AGENCY LAW OFFICE (CN)
Download PDF: