| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 411399000 | Head having counter-sinking means | 11 |
| 20090123253 | Countersunk head screw - The invention relates to a countersunk head screw comprising a cylindrical shaft ( | 05-14-2009 |
| 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 |
| 20100158634 | Self-Counter-Sinking Screw with Circumferential Cutters - A self-countersinking screw ( | 06-24-2010 |
| 20110064540 | SCREW HAVING UNDERSIDE CUTTERS AND POCKETS - A screw has a generally flat washer-like head. On an underside of the head are a plurality of cutters or cutting wedges arranged circumferentially around the shank of the screw. The cutters cut or carve off material when the screw is inserted into a fibrous material like wood to thereby facilitate countersinking of the screw head. The cutters may be triangular or quadrilateral wedges. One or more pockets are disposed radially inwardly of the cutters for receiving fibrous material to help lock the screw in place, i.e. to prevent the screw from loosening over time. These pockets may circularly shaped pockets disposed circumferentially around the shank. Alternatively, a single annular pocket may be provided around the shank. | 03-17-2011 |
| 20110076111 | SCREW HOLE SEAL STRUCTURE, AND PRODUCTION METHOD FOR FIBER-REINFORCED RESIN MEMBER - A screw hole seal structure seals a screw hole ( | 03-31-2011 |
| 20110182695 | ATTACHMENT MEANS - An attachment mean joins together two-dimensional components in dry construction by means of a placement tool, in particular for fixing two-dimensional building materials onto a metallic substructure. The attachment means has a shaft on one end region of which a point and on the other end region of which a head are formed. A face side of the head facing away from the shaft is formed with a concave curve. | 07-28-2011 |
| 20110188965 | FASTENER HAVING CONTROLLABLY VARIABLE PRELOAD AND METHOD OF FORMING SAME - A method of forming a fastener that includes an axial centerline, a seating surface angled with respect to the axial centerline at an angle α and adapted to contact an angled seat of a bore, the smallest diameter of the seating surface being designated a seating diameter, and a threaded connecting portion for engaging a threaded portion of a bore, the threaded connecting portion including a point designated a proximal contact point, the distance from the seating diameter to the proximal contact point in the direction of the axial centerline being the clamped length of the fastener, the method including steps of determining a value for at least a first one of angle α, seating diameter D and clamped length L, solving the equation α=arctan (D/(2L)) to calculate at least a second one of angle α, seating diameter D and clamped length L, and forming a fastener based on the determined and calculated values. Also a fastener and fastener system based on the method. | 08-04-2011 |
| 20120183373 | SELF COUNTER-SINKING FASTENER - A self-countersinking fastener for engagement with wood or similar composite material, said fastener including a penetrating shaft, and a tool engaging head; wherein said tool engaging head is substantially frusto-conical in overall shape and provided with one or more indent regions into which said material may be pushed as the head is turned; wherein each of said indent regions include: a trench extending substantially vertically through the entirety of said head; and a tailing section extending through the entire height of the head and extending forward in the direction of turning from said trench such that the radius of the head in the corresponding section increases throughout said section. | 07-19-2012 |
| 20140178149 | FASTENER CAPABLE OF SPEEDILY SCREWING - A fastener capable of speedily screwing provides a plurality of blocks on a bottom surface of a head and an accommodating area formed between any two adjacent blocks. Each block includes a first wall arranged at one side of the accommodating area and extended upward from the bottom surface, a second wall extending from the first wall to the other side of another adjacent accommodating area, and a cutting edge formed at a convergence of the first wall and the second wall. In screwing, the blocks assist in cutting to achieve a speedy screwing effect, and the accommodating area allows the cutting debris generated accordingly to be received therein so as to remain a firm engaging force between the fastener and an object. Further, there is no extra cutting debris protruding out of the object after screwing, which increases the flatness, and also enhances the screwing force of the fastener. | 06-26-2014 |
| 20140178150 | WOOD SCREW - A wood screw provides a plurality of auxiliary cutting areas disposed on a bottom surface of a head and a flat area formed in any two adjacent auxiliary cutting areas. Each auxiliary cutting area includes at least two cutting grooves disposed at intervals and formed on the bottom surface, and a cutting edge formed at a convergence of the connective cutting grooves. When the bottom surface contacts the surface of the wood, the cutting edge cuts and scrapes off burrs generated around the drilling hole, and the scraped burrs are accommodated in the cutting grooves to prevent the burrs from exposing to the head after screwing. Further, the head is tightly screwed on the wood to enhance the screwing stabilization. | 06-26-2014 |
| 20150104270 | FASTENER FOR AIRCRAFT STRUCTURES - A fastener is provided for an aircraft structure, the fastener comprising a shaft and a bugle shaped head, in which the bugle head comprises a first region proximate the shaft, the first region having a first radius of curvature, and, a second region on the opposite side of the first region to the shaft, the second region having a second radius of curvature, in which the second radius of curvature is higher than the first radius of curvature. | 04-16-2015 |
