Abstract: A spiral drive system for threaded fasteners includes driver-engageable surfaces on the head end of the fastener in which at least some of the driver-engageable surfaces are defined by a spiral segment configured to maximize torque transmission while spreading the driving load over a broad driver-fastener interface to reduce the risk of development of high stress regions. Drivers and related tooling also are disclosed.

Abstract: A two-ended screwdriver bit sized and configured to fit and lock in chucks that accept bits complying with American National Standards Institute specification ANSI B107.4-1982 for ¼ inch hexagonal bits. The two-ended bit has a hexagonal shank with two circumferentially-extending grooves in the screwdriver tip at each end of the shank. The length from the midpoint of each groove to the end of its adjacent screwdriver is ⅜ inches, permitting either end of the bit to be seated in a standard chuck.

Abstract: An eyeglasses maintenance kit includes a hollow casing body, a pincer, and a screw driving tool bit. The casing body has an open top end and a bottom end opposite to the top end, and includes upright front and rear walls and opposite lateral walls that interconnect the front and rear walls. The bottom end of the casing body is formed with a bit engaging member. The pincer is mounted removably in the casing body via the open top end of the casing body, and includes a pair of resilient clamping arms with upper and lower end portions, and a bridging portion that interconnects the upper end portions of the clamping arms. The tool bit is mounted to the bit engaging member.

Abstract: At least one of two components (1, 3) of a coupling includes a profile with four splines (5) having more or less radial edges (11). Four straight-line segments (6) on the inside of the profile are joined with the splines. The four straight-line segments (6) are designed to circumscribe a standardized square drive (14). This profile can be used for driving sockets and accessories for screwing and unscrewing.

Abstract: The invention relates to an actuating tool for a fastener having an internal polygon arrangement, particularly a screw, with a tool head having an external polygon arrangement to fit into this internal polygon arrangement, wherein the tool head has a circumferential recess to receive a spring washer. It is provided that the width of the recess (17) is greater than the dimension of the spring washer (21) measured in the direction of the width, and the spring washer (21) is elastically supported at least in partial areas against the sidewalls (41, 43) of the recess (17).

Abstract: A noncircular-based undulating key-receiving configuration, opposed undulating side walls in said configuration, a centerline within said side walls, with the centerline of the configuration lying within inner and outer noncircular perimeters. A key-receiving configuration containing a first undulating configuration within a second undulating configuration. A key having a first body insertable within a second body with both bodies having undulating key configurations thereon. A key-receiving groove having chamfered edges.

Abstract: A screw driver exclusively applied to drive a particular screw having compound drive recesses that can be driven by various conventional drivers, i.e., slot, cross, square-cross, square, and double-cross. The screw driver enables its drive bit to supply sufficiently large driving torques to the compound drive recesses of the screw and the screw driver lodges securely within the compound drive recesses of the screw as the drive bit of the driver turns.

Abstract: At least one of two components (1, 3) of a coupling includes a profile with four splines (5) having more or less radial edges (11). Four straight-line segments (6) on the inside of the profile are joined with the splines. The four straight-line segments (6) are designed to circumscribe a standardized square drive (14). This profile can be used for driving sockets and accessories for screwing and unscrewing.

Abstract: An electrical installer hand tool has multiple interchangeable rethread bits and drive bits in the one hand tool. The 10-in-1 hand tool optimally has 4 interchangeable rethread bits, 4 interchangeable drive bits and 2 nut drives. The 4 rethread bits optimally has size/number of threads, 6/32, 8/32, 10/32 and 10/24, and the 4 drive bits are correspondingly sized to drive screws in the rethreaded holes. The 10-in-1 hand tool permits an electrical installer to rethread putty-filled screw holes and then drive screws in the electrical box sheet metal construction with the one hand tool.

Abstract: The invention relates to a force transmission structure especially for a screwing wrench with multiple corners. The invention is configured for an inner multiple cornered mating profile especially for a screw with a six cornered inner case profile. The force transmission structure is constructed with equal multiple corners whose flanks border one another in a circumferential direction. The diameter contour line of each flank possesses two convex curvature lines which are interspaced and the interspacing area recoils between the curvature lines and connecting tangent lines, the tangent lines consisting of both crowns of the convex curvature lines. In order to transmit high levels of torque, the invention provides that the section of the curvature lines between the crowns and the multiple corners is either rectilinear of its curvature is flatter than that of the convex curvature line.

Abstract: A sink drain assembly includes a waste plug, a drain cap and a sink seal cap. The sink seal cap is formed and adapted to be attached to a sink drain conduit and to be mounted thereon in a sink drain opening. The waste plug and drain cap are detachably secured together so that the drain cap may be removably mounted on the waste plug and when so combined the waste plug and drain cap function to control the flow of water through the sink seal cap to the sink drain conduit. The waste plug, when removed from the drain cap, functions as a tool to remove the sink seal cap, thus the waste plug performing dual functions in the assembly.

Abstract: An improved fastener system includes a threaded pin and a tool. The pin contains a recess in a threaded end of the pin for receiving the tool, thus holding the pin against rotation during application of a nut on the pin. The recess includes splines extending around a circumference of the recess. A plurality of mating splines are located on an end of the tool for engaging the slots of the recess. The splines are oriented to maximize torsional performance and to balance the shear strength of the pin with the shear strength of the tool. Additionally the ends of the recess splines and a minor diameter of the tool include a matching curved surface to increase torsional strength.

Abstract: A cabinet tip for a screwdriver includes a drive tip end and a neck area below the drive tip end. The neck area includes a bottom wall adapted to engage with a side wall defining a slot of a fastener to be driven when the cabinet tip is in an inclined status relative to the fastener. The drive tip includes two flat or arcuate lateral surfaces. The drive tip end includes an arcuate top face.

Abstract: A shower drain tool includes a blade for engagement with the ribs on the internal surface of a shower drain. The tool also includes a stabilizer plate connected to the blade to seat the tool on the drain and prevent the tool from falling through the drain into the drain pipe. The tool further includes one of various tool adapters. The tool adapter can be a nut to be spanned by an adjustable or open-end wrench, or a hole into which a socket wrench drive or the tip of a breaker bar or T bar can be inserted, to rotate the tool. The tool adapter can also be a pipe wrench extension so that a pipe wrench can be used to rotate the tool. Alternatively, the tool can include a device, such as a T bar, integral with the stabilizer plate to rotate the tool.

Abstract: A floating, non-conductive hand tool such as pliers or channel locks for use by those working proximate to water or an electrical source. The tools are extremely durable, lightweight, and have an internal cavity capable of holding a gas or a light weight polymer foam material to substantially reduce the overall density of the hand tool. Alternatively, the handle ends of the tool may be encased with a low density sheathing material used either independently or in conjunction with the aforementioned internal cavity to reduce the density of the tool.

Abstract: A torque transmitting or coupling arrangement for a fastener drive system or the like, wherein the respective externally configured and internally configured components include a body having an axis in which the body has a modified polygonal cross section defined by a perimeter wall. A polygonal central portion positioned within the perimeter wall has an area less than the area of the modified polygonal cross section. A drive wall which forms a portion of the perimeter wall extends on a plane from a proximal end outwardly from the polygonal central portion to a distal end. A first outer wall forming another portion of the perimeter wall has a proximal end joining the distal end of the drive wall at an angle and a distal end terminating on the perimeter wall. The system includes a fastener driver, a threaded fastener and a forming tool for forming a recess in the fastener.

Abstract: The fastener of the present invention has a head integrally formed with a threaded shank. The face of the head has a triangular recess with a triangular centerpost extending upward from the recess. The recess has three sides forming corners, and the centerpost has three sides forming apices. The walls of the recess and the walls of the centerpost may form a channel therebetween and the top of the centerpost may be flush with the face of the head. The corners and the apices may be rounded to provide stress relief and to facilitate tool insertion and removal. The periphery of the head may be provided with a conical side wall narrowing toward the shank so that the fastener may be countersunk. The shank may be completely threaded or only partially threaded, and may have a pointed or chamfered end. It also may be provided with a hole so that a retaining device may be inserted therethrough.

Abstract: Disclosed is a tool handle for an electronic screwdriver or other hand tool. The tool handle includes a tool handle body having a longitudinal dimension and comprising a convex portion that comprises about ⅖ of the longitudinal dimension proximal to the grip of the handle body and a relatively soft concave portion comprising substantially all of the remaining ⅕ of the tool handle body proximal to the working end. The tool handle further including a cap disposed at the grip end of the tool handle body, which cap is rotatable relative to the tool handle body. A user may grip the tool handle in various positions to apply varying levels of torque to a screw or other workpiece. Preferably, the cap includes a dome-shaped recess at the grip end for centering of the tool between the fingertip and working end of the tool.

Abstract: A screwdriver used for a screw tightener includes at its tip portion a blade having a plurality of flat plate portions to be meshed in a recess formed in a head of a screw. In this screwdriver, each of the flat plate portions has at its tip portion an outer peripheral surface which extends in such a manner as to be converged in the direction toward the tip portion of the screwdriver. The outer peripheral surface of the flat plate portion is formed into an angled shape having a ridge line portion extending in the direction toward the tip portion of the screwdriver.

Abstract: A handle cover which facilitates holding a drill is disclosed. The cover has an upper cover portion surrounding the rear and side portions of the barrel portion of the drill; and, a lower cover portion surrounding the rear and side portions of the handle portion of the drill. The cover has two pads, one adjacent to a rear portion of the handle, and the other adjacent to a rear portion of the barrel, so that the hand is cushioned when it holds the drill either by its handle or barrel portion.

Abstract: The present invention relates to a screwdriver having expanding and folding action. The inside of its handle has a duct of the axial direction, a screw rod body penetrating the duct to slide back and forth, so as to jut out of the handle for a predetermined length, or to be received in the handle; a retaining device disposed in the handle and retains the rod body so as to cause the shank to be retained and located at a predetermined protruded length; the retaining device can be operated and controlled by a human hand to relieve the shank of the state of being retained.

Abstract: A driver bit and a driving tool having a plurality of projections formed on at least one surface of the shank portion/driving portion of the bit/tool to retain the bit in a bit holder, or to retain a socket or the like on the driving tool. The projections are formed such that the geometric envelope of the bit is within the tolerance of the bit holder, so that the bit can be used with standardized holders. When torque is applied to the bit or driving tool, the projections engage the inner surface of a standardized holder/socket, thereby retaining the bit/socket.

Abstract: A drive tool for use in driving a fastener having a combination head having slots to accommodate either a flat-blade screwdriver or a Phillips-type screwdriver, the drive tool having both a flat-blade and a Phillips-type blade, and foot portions positioned on each of said flat-blade and said Phillips-type blade for engaging the slots in the combination head. Additionally, a centering tip is provided that fits into the slots of the combination head and allows the drive tool to be guided into proper position by the slots.

Abstract: A device for retaining and delivering dental implant components includes a retainer-delivery member which may be pivotally attached to a handle member and selectively detached therefrom. The retainer-delivery member has a plurality of multi-sized stepped down portions for hands-off insertion into, and frictional engagement with various dental implant components. The retainer-delivery member can retain one or more of the components for delivery to the implant site and can be manipulated for initial connection to the implant.

Abstract: A handle for tools such as screwdrivers where an end region is shaped as a smooth rounded surface and made by injection molding in multiple steps from at least two differently colored plastic materials, which are tactilely indistinct, to form a visible marking for identification of the tool.

Abstract: The present invention is related to a screwdriver in which a shaft lever with polygon socket is inserted into the central hole of the screwdriver handgrip so that a turning shaft to facilitate force application is plugged from the rear end of the handgrip into the socket in order to perform a rapid rotation of the shaft lever; the other end of the shaft lever can be connected to a extension shaft to be in a coupled state while an application shaft for screwdriver head can be plugged into the inner hole of the extension shaft, and the screwdriver head is inserted into the socket of the application end of the application shaft to perform screwing, wherein the application shaft for screwdriver head can be designed to be section-type, and the application shaft can be stretched inside of the connection inner hole of the extension shaft and shaft lever by means of an engaging member fitted to the outer circumference of the extension shaft so that the exposing length is adjustable; in addition, a freely turning slee

Abstract: A hand tool having a handle provided with a fastening member for fastening detachably the handle with a blade. The handle is provided with an insertion hole extending along the direction of the longitudinal axis of the handle, and a receiving slot perpendicular to the insertion hole. The insertion hole is intended to receive the fastening end of the blade. The fastening member is located in the receiving slot and composed of a spring, a retaining block and a press block. The blade is detachably fastened with the handle such that the retaining block of the fastening member is removably located in a locating hole of the fastening end of the blade, and that the retaining block can be actuated by the press block to move out of the locating hole of the blade to enable the fastening end of the blade to be pulled out of the insertion hole of the handle.

Abstract: A hex wrench is provided for driving a screw having a screw head with a counterbore defined therein. The hex wrench is L-shaped and includes a longer section and a shorter section. The longer section includes a neck defined therein, thereby forming a distal driving end with an end face. The neck includes an end edge that faces the driving end. A distance between the end edge of the neck and the end face of the driving end is smaller than a radius of the screw to be driven. The end edge of the neck bears against the screw head when the driving end is received in the counterbore of the screw head in a slanted manner for driving the screw. A portion of the longer section above the neck is engaged with the counterbore of the screw head when the driving end is received in the counterbore in an upright manner.

Abstract: A combination screwdriver, scraper and prybar has a handle with an elongated shank terminating in a multi-function blade. The blade has opposed, flat, planar blade faces converging toward and joined by a distal planar end surface which intersects and is perpendicular to the longitudinal axis of the shank. The blade faces are respectfully inclined to the axis at substantially three degrees and substantially seven degrees. The shank may be square or circular in transverse cross-section and, if square, opposed sides of the shank lie in planes perpendicular to the blade faces.

Abstract: A multi-tier security fastener in the nature of a nut or bolt having a body with a first tier having a lobed drive surface, and second and third cylindrical tiers on opposite sides of the first tier, with all three tiers having different effective diameters. The second and third cylindrical tiers can have irregularities in the nature of a lobe or a depression.

Abstract: A fastener with a recessed drive socket and a driving tool with a cooperable driving head. The socket having a cylindrical interior wall interrupted by a plurality of driving corners. The driver having a tapered driving head including a plurality of sharpened driving edges adapted to engage the driving corners. The tapered driving end may be axially forced into the driving socket such that the plurality of driving edges frictionally engage the driving corners to hold the fastener on the driver and to enhance torque transmission. The cylindrical walls of the socket and the walls of the driver bit between the driving edges cooperate to define a fluid channel for passage of fluid around the driving head during positioning within the socket.

Abstract: A skate key assembly for adjusting the wheels of an inline skate comprises an elongated one-piece key member of uniform hexagonal cross section including an intermediate S-shaped gripping member extending in one direction to a generally straight operating portion having a terminal end for insertion into the tightening mechanism of a wheel of the inline skate and extending in an opposite direction to an attachment portion oriented generally transverse of said operating portion. A carrier device in the form of a snap hook releasably attaches the assembly to the clothing of a user. A side release buckle includes a first buckle component attached to the carrier device, a second buckle component attached to the attachment portion of the key member, and an engagement mechanism selectively operable for releasably attaching the first buckle component to the second buckle component.

Abstract: A screwdriver or screwdriver bit comprising a working end with radially extending engagement surfaces profiled in particular by machining or forming. A surface layer forming a working surface due to nitriting has a hardness of at least 900 HV 0.3 or 67-68 HRC and in an intermediate layer, lying between the hard surface layer and a softer region of a core of the working end, the hardness decreases with a hardness gradient of 1500 to 3000 HV 0.3/mm.

Abstract: In a preferred embodiment, an adapter to permit a socket to be driven by a powered drill to rotate the socket, the socket having a first opening defined at one end thereof for the insertion thereinto of complementarily shaped end of a driving tool and a second opening defined at another end thereof for the placement of the second end over a complementarily shaped portion of a first object to be driven, the first and second openings of the body being coaxial, the adapter including: a body; a first end of the body having a shape complementary to that of the first opening of the socket; a second end of the body having a shape suitable for insertion into a chuck mechanism of the powered drill; and the first and second ends being coaxial; whereby: when the first end of the body is inserted into the first opening of the socket, the second end of the body is inserted into the chuck mechanism of the powered drill, and the second opening of the socket is placed over the complementarily shaped portion of the first obje

Abstract: A tool for fixing a chainwheel to a crank arm assembly of the type wherein a crank axle mounting section of a crank arm mounts to an end of a crank axle. The crank axle mounting section includes a threaded outer surface, and a nut is provided for fixing the chainwheel to the crank axle mounting section. The nut includes a plurality of nut splines disposed on an outer peripheral surface thereof and a threaded inner peripheral surface for meshing with the threaded outer surface of the crank axle mounting section. The tool includes a tool-mount member shaped to be held and turned by a second tool, wherein the tool-mount member defines an opening for receiving the crank axle therethrough. An operating member is formed as one-piece with the tool-mount member and has a plurality of splines extending from an inside surface thereof for meshing with the plurality of nut splines.

Abstract: Apparatuses and methods are disclosed for extracting broken members, such as bolt and threaded fasteners, from tapped holes. The apparatus includes a shaft having a plurality of stepped regions and at least one engagement edge extending along the shaft. The apparatus further includes a drive portion suitable for mating with a driver, such as a wrench or power tools, to apply torque to and rotate the apparatus around an axis passing through the stepped regions of the shaft. Preferably, the apparatus includes four stepped regions of decreasing cross-sectional dimensions. The two largest cross-sectional regions define the drive portion that is engaged by the driver. The two smaller cross-sectional regions, or engagement regions, define an engagement portion. The cross-sections of the engagement regions are substantially square and defined by four substantially parallel engagement edges extending over the length of the engagement regions parallel to the rotational axis.

Abstract: An assembled hanging tool and hanger seat of the invention mainly comprises a hanging tool and a hanger seat. One end of the hanging tool is a hanger portion and the other end of the hanging tool is a hook portion. The hanger seat is substantially of a C shape wherein one side is provided with a hollow element for the threading through of the hanger portion in order to be lifted to a high place, and one end is provided with a projection for being inserted into a C-shaped steel support at a high place, and another end is provided with a threaded hole and a hanging hole wherein the threaded hole is used for engaging with a locking member which can be engaged or disengaged with the C-shaped steel support. One end of the locking member has a turning hole for the threading through of the hook portion in order to rotate and lock, or release the locking member, and the hanging hole is used for hanging or locking the article to be hung.

Abstract: A hexagonal head wrench having a body, six sides and six corners. A protuberance is formed on each corner. Each protuberance has two oppositely oriented flank members angled at a predetermined angle outwardly and away from each corner. Engagement of the wrench with a fastener occurs on a portion of each respective flank member distal from the corner. Continued application of torque progressively radially engages each flank member with the fastener.

Abstract: A theft prevention system is disclosed wherein modified screw heads can be removed by only a specially configured tool. The screw heads have a central polygon groove with at least two grooves projecting outward from the polygon. The screw removal tool is adapted to mate with the polygon groove and the projecting grooves to accomplish removal and tightening of the screw.

Abstract: A tool for fixing a chainwheel to a crank arm assembly of the type wherein a crank axle mounting section of a crank arm mounts to an end of a crank axle. The crank axle mounting section includes a threaded outer surface, and a nut is provided for fixing the chainwheel to the crank axle mounting section. The nut includes a plurality of nut splines disposed on an outer peripheral surface thereof and a threaded inner peripheral surface for meshing with the threaded outer surface of the crank axle mounting section. The tool includes a tool-mount member shaped to be held and turned by a second tool, wherein the tool-mount member defines an opening for receiving the crank axle therethrough. An operating member is formed as one-piece with the tool-mount member and has a plurality of splines extending from an inside surface thereof for meshing with the plurality of nut splines.

Abstract: A length-adjustable screwdriver including a handle having a polygonal center hole, a polygonal tube slidably mounted in the polygonal center hole of the handle, a collar block controlled by a chuck to lock the polygonal tube at the desired location, a shaft mounted in the polygonal tube and having a magnet at its front end adapted for securing a tool bit at the front end of the polygonal tube by magnetic attraction, and a sleeve slidably sleeved onto the polygonal tube, the sleeve having a spring-supported ball forced into engagement with one of a longitudinal series of locating holes of the polygonal tube to secure the sleeve at the desired location and a polygonal center through hole adapted for holding a tool bit when the front end of the sleeve protrudes over the front end of the polygonal tube.

Abstract: A new Extractor for Damaged Light Bulbs for removing the base of a broken light bulb from a socket easily and safely. The inventive device includes a four tiered flexible plastic tool a threaded part and a handle.

Abstract: A precision screwdriver having a handle with a rotatable portion consisting of a shaft, a handle, a thrust ring and a rotatable cap. The handle has a cylindrical portion with a raised edge formed on its outer surface, and an internal cavity. The rotatable cap is equipped with a hole therethrough for holding a bearing in the form of a single ball. An internal groove disposed at near the hole serves a securing function when the raised edge of the cylindrical portion of the handle is fitted to the rotatable cap internal groove. A concave securing plate with a hole therethrough is disposed on the outer edge of the rotatable cap hole. The securing plate serves to position the bearing with suitable surface exposed through the securing plate hole. Thus, the rotatable cap can be fitted onto the cylindrical portion of the handle and properly secured by mating the raised edge with the internal groove.

Abstract: The invention relates to a tool having first and second cooperating jaws connected by a pivot. Each jaw includes a gripping surface and two side surfaces, and each jaw has a nose end that is remote from the pivot. Handle means causes the jaws to close about the pivot. There is a groove in the gripping surface of each of the jaws extending to the nose end of the jaw. The grooves lie along the longitudinal axis that lies in a plane extending between the gripping surfaces of the closed jaws. A cavity that is deeper than the grooves is formed in both of the jaws at the ends of the grooves opposite the nose.

Abstract: A screwdriver adapted to be coupled to an electric drill for automatic rotation thereof including an interior member having a lower extent with a circular cross-section and a screwdriver tip at its end. The interior member has an upper extent of an enlarged cylindrical shape with a hexagonal component extending rearwardly thereof. An exterior cylindrical member of the screwdriver has a lower extent of a reduced diameter and an upper extent of an enlarged diameter and has an interior bore extending therethrough. The bore of the upper extent is adapted to receive the upper extent of the interior member and the lower extent of the exterior cylindrical member is adapted to receive the lower extent of the interior member with the screwdriver tip extending through the lower end thereof.

Abstract: An improved rotary tool head includes a modular embodiment having a shaft with a tapered insertion end to ease insertion into a handpiece socket and to cause self-alignment of the shaft with the socket. Another embodiment of the improved rotary tool head includes a collet with nonlinear slots separating the collet tangs. The nonlinear slots cause a wire or shaft inserted into the collet to be centralized in the collet and prevent the wire or shaft from protruding between the tangs.

Abstract: The crank arm of a bicycle is detachably secured to a receiving portion of the crank axle by disposing the receiving portion within a tapered hole formed in an inner side of the crank arm and threadedly engaging a bolt within a threaded hole in the receiving portion by applying a wrench through an axial hole of a bolt cover which is threadedly engaged within a threaded portion formed in an outer side of the crank arm.

Abstract: A fastener system includes a fastener and a driver tool in which the fastener includes a cavity for insertion of the driver tool and in which the driver tool and the fastener form an interlocking relationship between the driver tool and the fastener is formed by having a portion of the fastener overlie a portion of the driver tool. This interlocking relationship prevents accidental separation of the driver tool from the fastener and consequent marring of the surfaces of the work pieces being joined together and also prevents stripping of the driver tool and the fastener cavity.

Abstract: A valve rotator comprising a body having a generally annular peripheral surface at one end of the body and a central cavity opening at such end. The annular peripheral surface substantially surrounds the central cavity and has an interlocking surface region configured to interlock with a rotor of a rotatable valve. The body had a generally annular shoulder adjacent such one end which generally faces such end of the body. The annular peripheral surface extends toward that end of the body from the annular shoulder.

Abstract: A tool, particularly a torque-transmitting tool, such as a screwdriver or a screwdriver bit, having a shaft and a working region. In order advantageously to take up peak torques with such a tool, a damping region of lower hardness or lower torsion-bar constant than the working region is provided, associated with the shaft. For this purpose, the damping region can be subsequently annealed or have a different composition of material. The latter is preferably provided in the case of a tool of sintered metal.