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:
Jul. 09, 1991
Filed:
Sep. 04, 1990
Applicant:
Inventors:
Yoshio Kaneko, Utsunomiya, JP;
Kazumasa Kurihara, Utsunomiya, JP;
Assignee:
Nifco Inc., Yokohama, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16B / ;
U.S. Cl.
CPC ...
411 55 ; 411 41 ; 411 48 ; 411 59 ;
Abstract
A screw rivet includes a screw and a grommet. The grommet has internal steps for meshing with external threads of the screw. The internal steps are formed on the inner periphery of an expansible portion of a leg of the grommet split by axial slits, and have a staircase-like sectional profile.