Class / Patent application number | Description | Number of patent applications / Date published |
411394000 | Drive screw | 6 |
20090003966 | Structure of screw nail - Disclosed is a screw nail, which has chip grooves respectively obliquely cut through top and bottom sides of each of the threads thereof at different elevations and defining with each thread two parallel cutting edges, and a plurality of guide ribs protruded from the periphery of the nail shank and respectively connected between each two vertically spaced adjacent chip grooves for guiding out cut chips and enhancing binding between the screw nail and the workpiece. | 01-01-2009 |
20100183400 | SELF-DRILLING SCREW - A self-drilling screw includes a thread section, a head on the thread section, and a drilling section. The thread section has plural threads. The drilling section includes two opposite cutting edges with an end point for cutting a hole in a workpiece, a discharging section for exhausting bits cut by the drilling section, a guiding section formed above the discharging section to lead the screw to vertically move in the workpiece, and two discharging grooves to lead cut bits to temporarily stay in the discharging section. When the screw is rotated to move in a workpiece, the cutting edges can drill a hole, with cut bits moving into the discharge section and exhausted out through the discharging grooves. After the screw moves into the workpiece for a certain depth, the guiding section can guide the screw to move straight and accurately in the workpiece. | 07-22-2010 |
20110176888 | MASONRY ANCHOR - A masonry anchor includes a head and a body integral to the head and extending therefrom. At least one helical male thread surrounds the body and includes a leading face substantially perpendicular to the body and a trailing face disposed between the leading face and the head. The trailing face intersects the leading face at a thread crest. | 07-21-2011 |
20120301249 | FASTENER IDENTIFICATION MARKING - A fastener for being inserted a first depth d | 11-29-2012 |
20130017035 | SCREW NAILAANM Siemers; StefanAACI BurghausenAACO DEAAGP Siemers; Stefan Burghausen DE - The present invention relates to a screw nail ( | 01-17-2013 |
20130149070 | Fastening Element - A fastening element, which may be in the form of a blind rivet or a screw, is intended to be driven into an unperforated workpiece. In its front region that is intended to be driven into the workpiece, it includes a punching tip which is formed in a cylindrical manner and has a front end face which extends obliquely to the longitudinal axis. The punching tip may be smaller in diameter than the body of the fastening element or else have the same diameter. The section between the end face and the outer side of the punching tip forms a circumferential edge. On account of the oblique profile of the end face, this circumferential edge is arranged such that when the fastening element is driven in, the circumferential edge first of all strikes the metal sheet at one or at two points and the opening in the metal sheet is enlarged by shearing of the metal sheet at a point that moves around the circumference. | 06-13-2013 |