Abstract:
Es wird Steckschlüsseleinsatz (1) angegeben, der einen Grundkörper (2) mit einer Rotationsachse (3) aufweist. Der Grundkörper (2) weist eine erste Öffnung (4) auf, welche eine Schraubenkopfaufnahme (40) bildet. Der Steckschlüsseleinsatz (1) weist weiterhin zumindest ein an der Schraubenkopfaufnahme (40) ausgebildetes Drehmomentübertragungselement (5) auf, welches eine erste Drehmomentübertragungsfläche (51), eine zweite Drehmomentübertragungsfläche (52) und eine zwischen der ersten und der zweiten Drehmomentübertragungsfläche (51, 52) angeordnete Umfangsfläche (53) aufweist. Die Umfangsfläche (53) weist an einem der ersten Öffnung (4) zugewandten Ende eine erste Breite (531) und an einem der ersten Öffnung (4) abgewandten Ende eine zweite Breite (532) auf, wobei die erste Breite (531) größer ist als die zweite Breite (532). Des Weiteren wird ein Schraubwerkzeug mit einem Steckschlüsseleinsatz (1) angegeben.
Abstract:
A spanner may be a fixed open jaw, ring or shifting type, characterised in that each face of the spanner that engages a face of a hexagon nut or bolt, has a semi-circular groove in the face, the groove exceeding the dimensions of the apexes of the hexagon shape of the nut or bolt and having sharp corners where the groove meets the face. The groove can be engaged with the apexes of the nut or bolt hexagon shape as a firmer grip if very large torques must be applied, e.g. for loosening stubborn nuts or bolts.
Abstract:
A device includes a body (21) having a plurality of alternating drive regions (32) and corner regions (33) arranged about a central axis for cooperation to define a socket recess (30) having an open outer end (24) and an inner end (31). Each drive region (32) has a drive surface (35, 36) disposed thereon and confined thereto. At least one drive surface (35, 36) slopes toward the central axis in a first direction generally parallel to the central axis and in a second direction generally traverse to the central axis.
Abstract:
A high torque wrenching system having a wrench (20) with asymmetrical torque transmission capability. The wrench includes a plurality of protuberances (32) and a plurality of recesses (50) around a central axis (A). The fastener (30) also includes a plurality of protuberances (33) and recesses (51) around the central axis for mating with the wrench. The protuberances and recesses form a saw tooth shape. Each tooth or protuberance is formed by a first wrenching surface (36) for loosening the fastener and a second wrenching surface (38) for tightening the fastener. The wrenching surface carrying the loosening load is at a much smaller angle with respect to a radial vector (R) extending from the wrench's central axis than the wrenching surface carrying the tightening load. The result is that the loosening torque vector will have a much greater moment arm.
Abstract:
A tool for removing damaged fasteners and a method for making such tool wherein the tool (10) includes a first end (12) and a second end (14) with an outside surface (32) and an inside surface (40) defined between ends (12) and (14). A portion (46) of inside surface (40) is in the shape of an hexagonal frustum (54) that has a major end (58) and that includes spiral splines (25). Splines (25) have constant depth between the major end (58) and the minor end (56) of frustum (54) and the relief angle ( POUND ) of splines (25) decreases in the direction from minor end (56) toward major end (58). In the method for making the tool (10), a tubular section (118) is made from a tapered blank (91) by piercing one end of the tapered blank with a pierce punch (132). One end of the tubular section is then driven onto a splined punch (162) to provide splines in one end of the tubular section. The tubular section is then stripped off of the punch (162) by a kickout sleeve (166) and extruded through a round-to-hexagonal extrusion insert (182) to provide portion (46) of the inner surface (40) with a tapered, hexagonal shape.
Abstract:
Disclosed is an asymmetrical fastening system comprising (1) a fastener having asymmetrical loosening surfaces and tightening surfaces formed in a single fastening periphery, and (2) a wrench comprising asymmetrical loosening surfaces and tightening surfaces formed in a single fastening periphery, that engage, respectively, the loosening surfaces and tightening surfaces of the fastener. When the wrench engages the fastener and force is applied to the wrench the torque to failure of the system in the loosening direction is greater than the torque to failure in the tightening direction.
Abstract:
Wrench, such as a socket, box or open wrench, for rotation of hexagonal nuts or bolts, with an inner profile comprising contact surfaces for forces acting on the flat sides of the hexagon, where each contact surface has two parallel adjacent ridges close to each end, and a recessed center portion which does not touch the hexagon, and where the ridges have rounded tops.
Abstract:
A cap screw has an essentially cylindrical, cup-shaped socket head (5) intended for an internal drive with axial, diametrically opposite driving ribs (8, 9) projecting inward from the wall (7). A central, axial centering pin (13) provided with a diametral slot (14) in alignment with axial recesses (10, 11) in the driving ribs (8, 9) projects from the socket head (5) above the rim (23) of the cap screw.
Abstract:
A hinged handheld tool that includes an integrated power transmission mechanism to allow a user to increase an output pressure onto an external object. The handheld tool includes a first tool-part assembly and a second tool-part assembly, wherein each includes a hand lever, a jaw-receiving cavity, an independent jaw, and a cam. The independent jaw engages the external object and comprises an engagement end and a tapered end. The hand lever is the grasping element for the user. The hand lever of the first tool-part assembly and the second tool-part assembly are terminally and pivotably connected to each other about a fulcrum axis. The independent jaw is pivotably connected to the hand lever within the jaw-receiving cavity. The cam is rotatably mounted within the jaw-receiving cavity, in between the hand lever and the tapered end. The cam and the tapered end are mechanically coupled to yield a ratchet-type mechanism.