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:
Dec. 04, 1984
Filed:
Jul. 07, 1982
Applicant:
Inventor:
Hiroshi Kazino, Komaki, JP;
Assignee:
Kabushiki Kaisha Aoyama Seisakusho, Nagoya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16B / ;
U.S. Cl.
CPC ...
411387 ; 411416 ; 411417 ; 10 1 / ; 1015 / ;
Abstract
A tapping screw in which a shank includes a main shank portion having a substantially uniform diameter and a reduced diameter shank portion having a substantially rounded triangle shaped cross-section. Tapping is carried out by the apexes of the rounded triangle in the reduced diameter shank portion, and therefore, screwing torque is greatly reduced as well as the fastening force is greatly increased as compared with a conventional tapping screw.