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. 04, 2014
Filed:
May. 06, 2008
Andreas Wunderlich, Kupferzell, DE;
Andreas Wunderlich, Kupferzell, DE;
SWG Schraubenwek Gaisbach GmbH, Waldenburg, DE;
Wuerth International AG, Chur, CH;
Abstract
The invention relates to a particle board screw having a conical screw tip with a thread. The thread extends from the screw shaft to the front end of the screw tip. In order to make it easier to screw in, and in order to reduce the splitting effect in wood, a shoulder or rib is disposed in the front region of the screw, which is to say on the end or inside of the tapering part, preferably extending around the entire circumference with no pitch. The rib has a front flank running almost transversely to the longitudinal axis of the screw and a more strongly inclined rear flank. The screw has a reduced screw-in torque.