The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 2002
Filed:
Apr. 11, 2001
Yukio Ito, Kanuma, JP;
Eiichi Nakanishi, Kanuma, JP;
Nakanishi Inc., Tochigi-Ken, JP;
Abstract
A dental handpiece is disclosed for injecting an air-powder mixture and water against teeth for dental treatment. The handpiece includes a container for accommodating powders, an air supply line for supplying air into the container to produce an air-powder mixture in the container, a mixture transfer line for transferring the mixture, a water supply line for transferring water, and an injection nozzle for injecting the mixture and the water against a treatment site. The container has a curved inner surface for allowing whirl of air spatially in all directions in the container. The air supply line has a plurality of branched lines each extending in the central part of the container to close proximity to the curved inner surface of the container. Each of the branched lines has in its distal part a plurality of ports oriented to direct air flow therethrough along the curved inner surface of the container.