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:
Nov. 26, 2002
Filed:
Aug. 04, 2000
Richard Goldman, New York, NY (US);
Michael C. Sharp, Centerport, NY (US);
Stuart A. Mitchell, Harwinton, CT (US);
Parkell, Inc., Farmingdale, NY (US);
Abstract
A hand-held dental instrument for intraoral abrading of teeth includes a light-weight body made from a high temperature material and having internal bores or passageways for permitting fluid flow through the body. A rotatable nozzle assembly having internal fluid conduits therein is coupled to a distal end of the body such that a chamber is formed between the nozzle and the body. The chamber maintains fluid communication between an internal bore which is radially offset from a central axis bore of the body and an internal conduit of the nozzle assembly such that the nozzle can be rotated a full 360 degrees with respect to the body. The nozzle assembly includes a primary discharge port for directing flow of the air/abrasive material mixture and a secondary discharge port for directing a stream of liquid to a surface to be abraded. The primary discharge port of the nozzle head is preferably larger in diameter than the secondary discharge port and is disposed at an angle with respect to the secondary discharge port to meet at a point forward of the nozzle head. The handpiece is also provided with its own self-contained abrasive material supply which may be connected to the body or may be contained within the body. The abrasive material supply includes a coaxial pick-up tube and canister.