Abstract:
A screw with a polygonal hole (30) formed with a polygonal hole (32) disposed in the center of a screw head (30a) and comprising a vertical wall (33) with a preset depth, and with a cone base oriented from the lower edge of the vertical wall toward the center of a screw neck, wherein a vertical step forming an inscribed circle of the polygon is provided at the lower edge (33a) of the vertical wall (33) of the polygonal hole (32) formed in the screw head (30a), the cone base (35) oriented from the lower edge (34a) of the vertical step (34) toward the center of the screw neck is formed, and a driver bit (40) or wrench (41) to be fitted to this screw is provided at the tip of a peak edge (42) with a cylindrical projection (44) forming the inscribed circle of the polygon.
Abstract:
The present invention relates to a screwing tool made of hardened steel such as a screw-driver insert. This tool comprises a screwing head (4) followed by a neck (6) bearing an identification mark, as well as a torque transmission section (2) extending on the other side of said neck. According to this invention and in order to provide an optimal shape for use, the identification mark comprises symbols (18) which can be distinguished from each other by an angular offset movement in the circumferential direction, or which are arranged so as to be distinguished from each other.
Abstract:
In order to prevent the "cam-out" effect when turning screws using a motor-operated screwing tool, it is proposed that the outer edges (5) of the driving ridges (3) of a screwdriver bit should be shortened in such a way that they lie on or below the top side (12) of the screw head (8).
Abstract:
The invention relates to a tool, especially a torque transmission tool like a screwdriver or screwdriver insert with a shaft and a working region. In order to be able advantageously to absorb torque peaks with such a tool, in the shaft there is a damping region of reduced hardness or lower torque-rod constant than the working region. To this end the damping region can be subsequently annealed or have a different material composition. The latter is preferred in a sintered metal tool.
Abstract:
A skateboard tool having a fastener-engaging piece and a nut-engaging piece working cooperatively to unscrew multiple fasteners simultaneously. The fastener-engaging piece has a handle and a body, and is rigidly connected to a shaft which extends into the body and is rotatably connected with a set of interconnected gears. The handle and shaft are rotatable with respect to the body. The body also includes a plurality of fastener-engaging bits that are rotatably driven by the gears. The handle and shaft are rotated, which rotates the gears and rotates the fastener-engaging bits. There is also provided a wrench for engaging, and rotatably locking, nuts secured to the fasteners that are rotated by the fastener-engaging bits. The wrench has an elongated U-shaped body having a pair of legs and a connector base piece. Each of the legs includes at least one nut-receiving socket.
Abstract:
A drive system with full surface drive contact. The drive system tends to maximize the surface contact pattern or area at typical bit-recess reaction (drive) torque values, thereby tending to minimize bit-recess surface contact stresses, coating damage, recess ream and premature bit fatigue failure. An object of an embodiment of the present invention is to provide a drive system with full surface drive contact. An object of an embodiment of the present invention is to provide a drive system that tends to maximize the surface contact pattern or area at typical bit-recess reaction (drive) torque values, thereby tending to minimize bit-recess surface contact stresses, coating damage, recess ream and premature bit fatigue failure.
Abstract:
A torque transmission driver has a first end portion adapted to receive and transmit torque from a torque generation source, and a second end portion including a shaped tapered bit having drive surfaces with an alternating series of five or six lobes and troughs about a rotational axis, having a taper angle between 15 and 65 from the rotational axis operable to engage corresponding drive surfaces in a plurality of at least two size fasteners, the tapered drive surfaces of the bit comprising a first tapered portion operable to engage drive surfaces of a first sized fastener and a second tapered portion operable to engage drive surfaces of a second sized fastener, the drive surfaces of the second sized fastener being larger than the drive surfaces of the first sized fastener. The taper angle may be nominally 52 from the rotational axis.
Abstract:
Die vorliegende Erfindung betrifft ein Verbindungselement eines Verbindungssystems, ein Werkzeug zum Verbinden, Lösen und Prüfen des Verbindungselementes und ein Verfahren zum Versehen eines Verbindungssystems mit einer Verschlussversiegelung und/oder einer Momentenanzeige. Das erfindungsgemäße Verbindungselement (1) eines Verbindungssystems, insbesondere Schraube (1) oder Mutter, weist eine von einem Werkzeug, insbesondere Normwerkzeug, angreifbaren Werkzeugangriffsfläche (5) zum zumindest teilweisen formschlüssigen Kontakt mit dem Werkzeug zum Verbinden oder Lösen des Verbindungssystems auf und zeichnet sich dadurch aus, dass die Werkzeugangriffsfläche (5) zumindest eine Schwächung (9) aufweist. Dieses Verbindungselement (1) ist mit Standardwerkzeugen bedienbar und ggf. unter Einsatz von Spezialwerkzeugen mehrfach verwendbar. Dabei sind Manipulationen durch Unbefugte leicht erkennbar bzw. es kann leicht festgestellt werden, ob ein bestimmtes, vorher festgelegtes Moment ordnungsgemäß angewendet wurde.
Abstract:
A torque transmission driver has a first end portion adapted to receive and transmit torque from a torque generation source, and a second end portion including a shaped tapered bit having drive surfaces with an alternating series of five or six lobes and troughs about a rotational axis, having a taper angle between 15 and 45 from the rotational axis operable to engage corresponding drive surfaces in a plurality of at least two size fasteners, the tapered drive surfaces of the bit comprising a first tapered portion operable to engage drive surfaces of a first sized fastener and a second tapered portion operable to engage drive surfaces of a second sized fastener, the drive surfaces of the second sized fastener being larger than the drive surfaces of the first sized fastener.