Patent application number | Description | Published |
20090123253 | Countersunk head screw - The invention relates to a countersunk head screw comprising a cylindrical shaft ( | 05-14-2009 |
20090142161 | Screw Anchor - A screw anchor for fastening wooden construction parts on concrete or masonry comprises a shaft having a first threaded portion with a wood screw thread to be screwed into wood and a second threaded portion with a concrete thread to be screwed into concrete, the wood screw thread having the same or a somewhat smaller pitch than the pitch of the concrete thread. | 06-04-2009 |
20100143070 | HEAD OF A COUNTERSUNK SCREW - The invention relates to the head of a countersunk screw with a lower side which has at least one supporting surface, which forms part of a rotational surface about the screw axis and can nestle against a correspondingly contoured countersunk surface of an add-on part, and has at least one depression which is delimited by a cutting edge at its end which runs downwards, as seen in the screwing-in direction of the countersunk screw. The invention is distinguished in that in front of the supporting surface, as seen in the screwing-in direction, there is an approach surface which butts against said supporting surface, is inclined radially inwards and, at its upwardly running, free end, has the cutting edge which, over its length, maintains a radial distance from the rotational surface to the inside. | 06-10-2010 |
20100281677 | Production Of A Planned Distribution Of Internal Stress In Components By The Insertion Of Screws Or Threaded Rods Having A Thread Pitch That Is Variable In The Longitudinal Direction - Method for reinforcing a component and/or for introducing force into a component using a screw or a threaded rod, wherein the screw or threaded rod has a thread with a variable thread lead, which thread creates an internal stress distribution, which is suitable to reduce at least one maximum in the bond stress occurring under loading of the component. | 11-11-2010 |
20100290858 | SCREW ANCHOR FOR FASTENING ADD-ON PARTS IN CONCRETE OR BRICKWORK - A screw anchor for fastening add-on parts in concrete or brickwork comprising a shaft ( | 11-18-2010 |
20100316466 | METHOD FOR PRODUCING A THREADED INSERT WITH AN INTERNAL AND EXTERNAL THREAD, AND THREADED INSERT - The invention relates to a method for producing a threaded insert having an internal and external thread which have different thread pitches or the same thread pitch, wherein the threaded insert is wound from a profile strip which, on the one side thereof, is pre-shaped with the profile of the external thread, and on the other side thereof, is pre-shaped with the profile of the internal thread, and to a threaded insert which is generated by means of said method. | 12-16-2010 |
20110286814 | THREAD-FURROWING SCREW - A thread-furrowing screw comprises a shaft portion made of solid material and a thread portion attached to the shaft portion, which thread portion is wound from a profiled metal strip. | 11-24-2011 |
20120309548 | Method and Rolling Die for Producing a Screw with A Variable Thread Pitch - Disclosed herein is a method for manufacturing a screw comprising a continuous thread with a variable thread pitch, in which method a blank is rolled between two rolling dies, wherein in each rolling die a rolling profile is formed that comprises a host of curved non-parallel depressions. The depressions are designed and arranged in such a manner that during rolling no volume transport, or as little volume transport as possible, in the axial direction takes place, or a volume transport from a region of the blank where a thread section with a larger thread pitch is to be formed, to a region in which a thread section with a smaller thread pitch is to be formed takes place. | 12-06-2012 |
20120316000 | Method and Rolling Die for Manufacturing A Screw - A method for manufacturing a screw is disclosed where a blank is rolled between two rolling dies. In each rolling die a rolling profile has been formed that comprises a host of elongated depressions. The rolling die has a first and a second end which are spaced apart from each other in the direction of rolling. During rolling, the blank is moved relative to the die from the first end in the direction of the second end. The mean pitch of the centre lines of the depressions, which pitch is defined as the quotient of the changes in the positions of the centre line in the direction across or parallel to the direction of rolling, in a region of the first end of the rolling die differs from the mean pitch in a region of the second end of the rolling die. | 12-13-2012 |