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:
Mar. 14, 2006
Filed:
Mar. 12, 2003
Alexandre Sierro, Celigny, CH;
Lutz Beerstecher, Borex, CH;
Alexandre Sierro, Celigny, CH;
Lutz Beerstecher, Borex, CH;
Ferton Holding S.A., , CH;
Abstract
A dental handpiece for use with a device for treatment of teeth by a jet of an abrasive powder mixed with air and water has a first one-way valve in a first supply line for pressurised air connected to an integrated powder container of a gripping sleeve and at least a first filter is further provided in this first supply line at a position upstream of the first one-way valve and downstream of a connecting end where the supply line connects with a common supply for air and water which is provided at the rearward end of the gripping sleeve. A second filter is provided at a position downstream of the first one-way valve in the first supply line and a second one-way valve is provided in a second supply line for water together with a third filter. The first and third filters each have a fine-meshed screen body. The second filter has a microporous sintered metallic body or a microporous plastic body.