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:
Feb. 04, 1986
Filed:
Dec. 06, 1984
Applicant:
Inventors:
Toshihiro Hotta, Uji, JP;
Imazatol Minoru, Otsu, JP;
Assignee:
Kabushiki Kaisha Morita Seisaksuho, Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61C / ;
U.S. Cl.
CPC ...
433104 ; 433131 ;
Abstract
A handpiece for medical treatment having a brushless micromotor mounted in a handpiece casing for driving a cutting tool and having a coolant passageway formed on the outer periphery of a cylindrical yoke fixed to the frame of the handpiece body. In this handpiece, the coolant passageway is formed helically around the axis of the yoke from one end to the other end of the yoke. The sectional area of the yoke in any given longitudinal sectional position along the axis of the yoke is rendered approximately equal to prevent a reduction in motor torque and also enlargement of the handpiece in diameter.