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. 23, 1982
Filed:
Nov. 24, 1980
Applicant:
Inventors:
Leopold P Lustig, Newton Centre, MA (US);
Anselm Yaron, Brookline, MA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61C / ; A61C / ;
U.S. Cl.
CPC ...
433133 ;
Abstract
A dental hand-piece of the type known as 'contra-angle' uses a pair of helical gears on shafts that rotate on respective axes which pass by each other but do not intersect. The gears, one set of which is on a tool driver and the other set of which may be formed in the shaft of a dental tool, engage in respective pitch circles, the diameters of which are smaller than their respective outer diameters.