SINGLE-USE DEVICE FOR PREVENTING BACK SIPHONAGE IN HIGH-SPEED TURBINE DENTAL HANDPIECE

WIPO Patent Application WO/2017/121046

A1

A single-use device for preventing back siphonage in a high-speed turbine dental handpiece. The device is installed on a side of a handpiece head (1) provided with a burr (3). The device comprises an elastic spindle sealing cover (17) and an inelastic spindle sealing cover (15). After successively connecting the device, the elastic spindle sealing cover (17) will press against a conical braking surface of a turbine spindle (9) once the dental handpiece is switched off, achieving rapid braking and preventing back siphonage. A metal ring (18) is provided in the center of the elastic spindle sealing cover (17) to prevent a curved deformation of the elastic spindle sealing cover (17) caused by air pressure-induced swelling, thereby avoiding loss of rotation speed and output power. The inelastic spindle sealing cover (15) can prevent excessive air pressure-induced swelling and resulting loss of elasticity of the elastic spindle sealing cover (17). The device has low cost and is able to stop back siphonage, extend a service life of the elastic spindle sealing cover (17), and effectively prevent cross infection.

ZHANG FUDONG (CN)

PCT/CN2016/079142

July 20, 2017

April 13, 2016

Click for automatic bibliography generation  

BEIJING THE ORIENT DOCTOR'S PNEUMATIC TOOLS CO LTD (CN)

A61C3/02; A61C1/05; F16K15/14

CN205268308U	2016-06-01
CN105476722A	2016-04-13
CN205379370U	2016-07-13
CN1887237A	2007-01-03
EP1025809A2	2000-08-09
CN102871733A	2013-01-16
CN202223362U	2012-05-23
CN2510028Y	2002-09-11

BEIJING DIJIN INTELLECTUAL PROPERTY AGENCY LAW OFFICE (CN)

View/Download PDF      PDF Help

Previous Patent: ULTRASONIC WASHING UNIT FOR HARD ENDOSCOPE

Next Patent: CAMERA AND TERMINAL PROVIDED WITH SAME