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:
Feb. 18, 2003
Filed:
Aug. 09, 1999
Andreas Reusch, Remscheid, DE;
Giuseppe De Bona, Remscheid, DE;
Wera Werk Hermann Werner GmbH & Co., Wuppertal, DE;
Abstract
The invention relates to a screwdriver or screwdriver attachment (S) comprising one input and one output end ( and ) and a shank ( ) located in between the two. The output end has at least three, preferably four, ribs ( ) which radiate outwards from a central section ( ) located around the axis of rotation (x—x). The ribs ( ) on each end side have a face, which is placed at an angle to the axis of rotation, and flanks on the front and back side ( ) which run substantially parallel to each other in the area next to the frontal face ( ). In this area the flank ( ) on the front side is located on a diametrical surface (diameter D—D) in relation to the axis of rotation (x—x), whereby the flanks ( ) of adjoining ribs ( ) form a groove ( ) which runs lengthways and whose root ( ) ends in the outer surface of a section of the shank. The invention provides a solution that is more balanced in terms of load and easier to use, by having flanks ( ) that are curved in such a way that they point away from each other in the direction of the axis, starting from the face area of each rib ( ).