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:
Jun. 03, 2014
Filed:
Apr. 19, 2010
Jone Edland, Olso, NO;
David Curtis Goss, Rockford, IL (US);
Jone Edland, Olso, NO;
David Curtis Goss, Rockford, IL (US);
Ttapdrive AS, Kristiansand, NO;
Abstract
Disclosed is a screw head having a slot () in the upper surface of the screw head, an upper peripheral wall () of hexalobular planform extending down into the screw head, the upper peripheral wall () being parallel or near parallel to the axis of the screw, a sloping transition surface () extending downwardly and inwardly with respect to the lower edge of the upper peripheral wall (), and a tapered recess () extending downwardly from the lower edge of the sloping transition surface (), in which the dimensions of the screw head are such that when the screw head is engaged by a tool () having upper () and lower engagement () sections, there is a 'stick fit' between the surface of the tapered recess () and the external surface of the lower engagement section (), and there is no engagement with the sloping transition surface ().