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. 13, 2001
Filed:
Feb. 29, 2000
Applicant:
Inventor:
Takasuke Nakanishi, Kanuma, JP;
Assignee:
Nakanishi Inc., Tochigi-ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61C 3/06 ; A61C 1/16 ;
U.S. Cl.
CPC ...
A61C 3/06 ; A61C 1/16 ;
Abstract
Prophy head for a handpiece used in dentistry. The prophy head has a rotating shaft which holds a polishing member, a bearing for supporting the shaft, a housing for retaining the bearing, and a rotary dust control device which rotates with the shaft and prevents intrusion of contaminants. The dust control device has a surface extending radially outwardly from the shaft and downwardly beyond the lower end of the housing, and a surface in close proximity to the inner surface of the lower end of the housing.