Title:
ZERO SUCKBACK DEVICES FOR DISPOSABLE HIGH-SPEED TURBINE DENTAL DRILL HANDPIECE
Document Type and Number:
WIPO Patent Application WO/2017/206297
Kind Code:
A1
Abstract:
Zero suckback devices for a disposable high-speed turbine dental drill handpiece, mounted at two ends of a handpiece head body (1). The zero suckback device, provided at one end of the handpiece head body (1) where a bur (3) is mounted, consists of an elastic shaft enclosure (7) and a non-elastic shaft enclosure (6); a hard material center skeleton (8) is embedded at the center of the elastic shaft enclosure (7), and the lip part of the elastic shaft enclosure (7) matches the tapered end part of a rotor shaft (20). The zero suckback device, provided at one side of the handpiece head cover body (2) of the handpiece head body (1), comprises an O-shaped sealing ring (14) provided between a button cover body (15) and the handpiece head cover body (2), and a one-way ball valve provided at the center of the button cover body (2).
Inventors:
ZHANG FUDONG (CN)
Application Number:
PCT/CN2016/091512
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:
| CN105476722A | 2016-04-13 | |||
| CN102379746A | 2012-03-21 | |||
| CN102836011A | 2012-12-26 | |||
| US5334013A | 1994-08-02 | |||
| US20070172791A1 | 2007-07-26 | |||
| CN202612069U | 2012-12-19 | |||
| CN204890564U | 2015-12-23 | |||
| US20040166474A1 | 2004-08-26 |
Attorney, Agent or Firm:
BEIJING DIJIN INTELLECTUAL PROPERTY AGENCY LAW OFFICE (CN)
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