Abstract: A panel fastener is provided that has a head having a first surface and a second surface opposite the first surface; an engagement feature on the first surface of the head, the engagement feature being configured to be engaged by a driving tool; a shank extending from the second surface of the head; a threaded portion extending from the shank, the threaded portion having first and second helical threads arranged in an intertwined manner; the first thread extending farther radially from the central axis than does the second thread; and the shank being located between the head and the threaded portion.

Abstract: An article for use in a torque transmitting system which has a drive surface configuration having side and end surfaces is disclosed. The end surface tapers upwardly and outwardly from a lowermost point provided along a longitudinal axis to the side surface. The end surface defines a plurality of identically configured lobes that extend from a first point to a second point. The first point of one lobe is identical to the second point of an adjacent lobe. The first and second points of each lobe are provided along an imaginary circle having its center along the longitudinal axis. Each lobe extends from the first point to the second point by a series of edges that are straight, concave and/or convex. Two of the edges are tangential to the imaginary circle. The side surface extends upwardly from the edges defining the plurality of lobes.

Abstract: The invention provides a screw head having a hexalobular slot (2) in the upper surface of the screw head, an upper peripheral wall (9) of hexalobular planform extending down into the screw head, the upper peripheral wall (9) being parallel or near parallel to the axis of the screw, a sloping transition surface (15) extending downwardly and inwardly with respect to the lower edge of the upper peripheral wall (9), and a tapered recess (11) extending downwardly from the lower edge of the sloping transition surface (15), in which the dimensions of the screw head are such that when the screw head is engaged by a tool (6) having upper (16) and lower engagement (17) sections, the lower engagement section (17) is tapered, and there is a ‘stick fit’ between the surface of the tapered recess (11) and the external surface of the lower tapered engagement section (17), and there is no engagement with the sloping transition surface (15).

Abstract: A threaded fastener, such as a screw or a bolt, has a central longitudinal axis in a z-axis direction. The fastener has a head and a threaded shaft. The head has an overhanging periphery in an x-y plane and at least two slots, evenly-spaced apart, that extend completely through the overhanging periphery. Each slot has a sloped surface that undercuts the overhanging periphery in the same tangential direction. The screw is turned by using a bit that has a central longitudinal axis in a z-axis direction. The bit has a shank fixed to an end portion and at least two legs, evenly-spaced apart, extend from the end portion in a z-axis direction. Each leg has a sloped surface that extends in the same tangential direction.

Abstract: Interference surfaces are constructed on inner transition surfaces between wings of a fastener having a spiral recess. A portion of the transition surface is tapered to provide the interference. A standard driver for a spiral recess will engage the interference surface to create a “stick fit” engagement. The punch is formed using a wire EDM operation to construct tapered surfaces within the die cavity of a hob. The hob is machined down to obtain the desired depth, which is measured up from a gage spot indicative of the sticking point.

Abstract: The fastener of this application is designed to facilitate the insertion of rotating power driven tools into the fastener recess. The recess of this fastener generally uses spirally configured driving surfaces and is formed in a counterbore in the upper surface of the fastener. The driving lobes have upper surfaces that are depressed a distance into the counterbore. A ramp surface is formed on each of the upper surfaces that causes a spinning bit to fall into the recess in an engaged manner. The ramp surfaces are constructed with both removal and installation ramp portions.

Abstract: A screwdriver element includes two bits, each with a sinuous distal tip end and a screw element includes a head having an X-shaped slot that has sinuous side walls. The bit distal tips have a left-handed shape and a right-handed shape and the side walls of the screw element head are curved in a corresponding manner whereby twisting the screwdriver after the tip is engaged with the screw head slot will cause the screw driver tip to be drawn into tight engagement with the screw head.

Abstract: A threaded fastener capable of being reduced in size and weight. A pair of side wall surfaces of each of six radially outwardly projecting, torque transmitting portions lie on straight lines passing through the center line in a cross section perpendicular to the center line so as to transmit torque through the side wall surface, whereby the direction of a surface orthogonal force N applied to a force-applied point P by a wrenching tool coincides with the direction of an effective wrenching force F. This arrangement reduces an operation force required for rotating the wrenching tool and accordingly the load acting on each of the torque transmitting portions, in comparison with a conventional hexagonal head. That is, it is possible to reduce the diameter of the head portion of the threaded fastener and the size and weight of the head portion, while avoiding deformation of the side wall surfaces through which the torque is transmitted.

Abstract: A wrenchless clamp assembly is provided to secure a tool disc, such as a circular saw blade, to a shaft of a power tool. The blade clamp assembly includes an outer flange positionable against an outer side of the blade and a manually tightenable click bolt that includes a movable click member operable to selectively engage the outer flange for rotationally locking or unlocking the bolt. In an embodiment, the click member moves alternatingly between axially engaged and disengaged positions according to sequential rotational increments of the click member relative to the bolt body. Accordingly, the click bolt can be installed by hand and rotationally locked without a need for high torque, and the click bolt can be easily removed by hand when the click member is moved to the disengaged position, axially free from the outer flange. In an embodiment, the click bolt permits limited torque applied during installation.

Abstract: A torque limiting fastener includes a fastener body and a fastener head insert configured to fit within the fastener body and to transfer a limited amount of torque to the body. The fastener body has a head with a bore formed therein and having a first set of protrusions. The fastener head insert has a tool interface for accepting a mounting tool and a perimeter edge onto which a second set of protrusions are disposed. A torque applied to the tool interface region will rotate the fastener head insert within the bore and cause the second set of protrusions to engage with the first set of protrusions to transfer torque to the fastener body. If the applied torque exceeds a limiting value, the second set of protrusions will fail to maintain engagement with the first set of protrusions and the fastener head insert will rotate without transferring the excessive torque.

Abstract: A boring tool is proposed which has a cutting portion at one end thereof, a driver engaging portion at the other end thereof, a shank arranged between the cutting portion and the driver engaging portion. The shank is formed with a helical groove for discharging cuttings. The driver engaging portion has a hexagonal outer shape and is formed with a hexagonal hole and a recess at bottom of the hexagonal hole for receiving the tip of a driver. The cutting portion has a pointed tip and a substantially conical shape, a first recess formed by cutting off substantially a 180° section of the cutting portion as seen axially from the pointed tip with an edge in the rotational direction forming a cutting edge, and a second recess formed by cutting off substantially a 90° section of the remaining 180° section. The second recess is separated from the first recess by a thin-walled partitioning wall.

Abstract: A drive socket for a male threaded fastener includes a plurality of rounded lobes of equal radius which are located equidistant from the center of the fastener and an equal distance from each other. The drive socket also includes flat surfaces located opposite the lobes and equidistant from the center of the fastener. Another embodiment of a drive socket includes a first set of lobes and a second set of lobes, each lobe being of equal radius and equidistant from the center of the fastener. The lobes of the first set are equidistant apart and the lobes of the second set are also equidistant apart and equidistant apart from the adjacent lobes of the first set on either side of the lobe of the second set. Each of the lobes of the first set includes a flat surface which is adjacent and tangential to the radius portion of the lobe.

Abstract: A series of high security fastener constructions feature rotatable anti-theft shrouds mounted on locking wheel nuts and wheel bolts designed for vehicular wheels. Each construction features (1) a fastener body having a first body end adapted to accommodate a key receiving pattern or member, a second body end having thread pattern extending therefrom, and a shroud receiving portion located between the first and second body ends, (2) a shroud concentrically mounted on the shroud receiving, and (3) a shroud retaining system for retaining the shroud for rotation relative to the fastener body such that the shroud will rotate under an applied torque prior to the fastener rotating when it is installed at a design installation torque.

Abstract: A sidewalk bolt is provided. The bolt includes a head portion, a threaded shaft portion extending perpendicularly outward from a first side of the head portion, and a socket head recess well formed within a second side of the head portion for use in driving the bolt. A depth of the recess well is greater than the width of the head portion between the first side and the second side.

Abstract: A drive socket for a male threaded fastener includes three rounded lobes of equal radius which are located equidistant from the center of the fastener and 120° apart from each other. The drive socket also includes three flat surfaces, each flat surface being located opposite one of the lobes and equidistant from the center of the fastener. Another embodiment of a drive socket includes a first set of three lobes and a second set of three lobes, each lobe being of equal radius and equidistant from the center of the fastener. The lobes of the first set are 120° apart and the lobes of the second set are also 120° apart and 60° apart from the lobes of the first set. Each of the lobes of the first set includes a flat surface which is adjacent and tangential to the radius portion of the lobe.

Abstract: A device includes a body having a plurality of alternating drive regions and corner regions arranged about a central axis for cooperation to define a socket recess having an open outer end and an inner end. Each drive region has a drive surface disposed thereon and confined thereto. At least one drive surface 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. The device may be a rotatably driveable device for driving fasteners and the like, wherein the axis is the axis of rotation. The device can be used for retaining and driving a drive member. In one form, a drive member, comprising alternating flats and corners is inserted into the device. The flats of the drive member frictionally engage with at least two of the drive regions, thereby releaseably retaining the drive member in the body. The drive member can be rotated by rotating the body in one of the clockwise and counter-clockwise directions.

Abstract: An anti-loosening nut assembly is composed of an upper nut 3 and a lower nut 2 that engage with each other in an eccentric manner to afford the so-called ‘wedging’ effect of surely inhibiting them from loosening themselves. The upper nut 3 has one or more lateral lugs to be brought into contact with the lower end of a fastening tool such as a spanner. The lug or lugs 3b protrudes or protrude from the outer peripheral portion or portions of the upper nut 3 for the purpose of visual detection of rotation angle of this nut.

Abstract: A pull stud bolt has two pairs of wrench engaging faces formed on a flange thereof. The adjacent wrench engaging faces make an angle of 90 deg with each other. Alternatively, three pairs of wrench engaging faces are formed on the flange. The adjacent wrench engaging faces make an angle of 120 deg with each other.

Abstract: A screw with a thin head comprising a screw head (2) and a shank (4), and with its top (5) forming a circular arc of a large radius has an unthreaded part (20) tapered down between the bearing surface (6) and the thread (3) and has a radius (21) connected to the thread portion (3), and therefore it will be readily produced to be used for compact products and correspond with thin products. And the radius (21) is connected to the unthreaded part (20) of the shank on one hand and to the screw ridge (3) on the other, preventing stress concentration at this part from occurring at time of fastening and a long time after the fastening of the screw, so ensuring a fastening strength, without causing a fatigue fracture. And further, when heating and plating treatments have been given to the screw, as the top of the screw head is not flat, there is no possibility of the heads of the screws being stacked to each other in the course of mass production, ensuring stable heat and plating treatments.

Abstract: A fastener having a tamper-evident sleeve thereon. The fastener has a shank and a double-headed driving portion that is integrally formed with the shank. The double-headed portion includes an outer head for driving the fastener into a work piece or nut and an inner head for removing the fastener from an assembly. The sleeve is on the inner head and prevents a tool from being engaged with the sleeve for removal of the fastener without there resulting some indication that someone has removed or tried to remove the fastener.

Abstract: A coaxial connector assembly for mounting in an aperture in a stiff plate includes a barrel having a shoulder at its rear end for engaging an interior surface of the mounting plate and an external screw thread intermediate the front and rear ends of the barrel. A nut is fitted on the barrel from the forward end thereof and has an end face with a key formation for engagement by a driving tool.

Abstract: Disclosed is a screw with an improved head, in which a stress-relieving notch is formed at each corner of a driving recess on the screw head. The stress-relieving notch is in an equal arcuate shape. Apart from the well known slotted or Phillips one, the driving recess is also available with a triangle, square, hexagonal, or any other multiangular form in section.

Abstract: In the screw of the present invention, a screw shaft and knob have a torque controller which rotates the screw shaft and the knob together until a rotating torque between the screw shaft and the knob reaches a predetermined level, and slips the knob toward the screw shaft if the rotating torque exceeds the predetermined level, while the knob is rotated along a direction for screwing the screw; and the torque controller also rotates the screw shaft and the knob together even if the rotating torque exceeds the predetermined level, while the knob is rotated along a direction for unscrewing the screw. Therefore, the screw can properly fasten and unfasten with the screw controller.

Abstract: An air circulating fan wherein the fan components are shipped disassembled. All of the fasteners used to assemble the fan components may be operated without tools, utilizing thumb screws and the like wherein the fan is capable of a “toolless” assembly. A hand operated fan mounting clamp includes a safety device to prevent loosening due to vibration.

Abstract: A combination sidewalk bolt is provided. The bolt includes a head portion, a threaded shaft portion extending perpendicularly outward from a first side of the head portion, a Phillips head recess well formed within a second side of the head portion for use in driving the bolt, and a slotted screwdriver slot provided in the second side of the head portion. A depth of the recess well is greater than the width of the head portion between the first side and the second side.

Abstract: The present invention provides a novel fastener having a tamper indicating tool engaging drive head. The fastener has a shank including a threaded shank portion. The fastener also has a double-headed driving portion that is integrally formed with the shank. The double-headed portion includes an outer head for driving the fastener into a work piece or nut and an inner head for removing the fastener from an assembly. The inner head is joined to the outer head such that the inner head is positioned between the outer head and the shank. Extending portions extend from tool engaging surfaces of the inner head. In use, the fastener is driven into an assembly via a proper tool that engages with the outer head. The outer head shears off the fastener when the desired torque is achieved, leaving only the shank within the assembly and the inner head exposed.

Abstract: A nut covering device comprises the following: a cover assembly, including an inner cover, outer cover, and a first constraining mechanism; a second constraining mechanism; and a third constraining mechanism. The first constraining mechanism constrains so that there is no relative motion of the outer cover with respect to the inner cover in an axis direction. The second constraining mechanism constrains so that there is no relative motion of the inner cover with respect to the nut member in the axis direction. The third constraining mechanism constrains so that there is no relative motion of the outer cover with respect to the nut member in the axis direction at least in the removal direction. When a circumferential phase of the inner cover and the outer cover is matched with a predetermined specified phase, second and third constraining mechanisms are released, and the cover assembly can be removed from the nut member.

Abstract: Screws with compound threads. Each of the screws includes a head with a compound drive recess therein. The compound drive recess for the screw driver(or the screw drive bit) is shaped to have four symmetrical fan-shaped portions, a center square portion with four faces, and eight chamfer edges intermediate to the center square portion and each of the four fan-shaped portions. The compound drive recess allows the screw to be driven by various screw driver such as slot, Phillips, square, Pozi and cross-square. The compound drive recess can be driven by its tailor-made driver, which gives the compound drive recess the capacity to withstand high driving torques with minimal drive bit slip or cam-out.

Abstract: A screw includes a shank and a head. The head includes a driving socket having a long slot that extends axially into the head to a depth. A first short recess is defined in a bottom wall defining the long slot and extended along a longitudinal axis of the long slot, the first short recess being narrower yet deeper than the long slot. A second short recess extends along an axis that is normal to the longitudinal axis of the long slot. The second short recess is as deep as the first short recess, the short recesses together defining a cross-shape recess for receiving a Phillips type screw driver, the cross-shape recess including four ends. The driving socket of the head further includes a square recess that is located within an area defined by the four ends of the short recesses, the square recess being adapted to receive a square socket type driver. The square recess extends axially into the head to a depth deeper than the short recesses.

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: A screw comprises a shank (2) and a head provided with a tool drive (6). The shank is provided with a thread (4), and at its free end has a boring part (5). The head (3), measured in axial direction of the screw (1), has a height (LK), which is smaller than the pitch (S) of the thread (4) formed on the shank (2). An external tool drive (6) is formed on the head (3).

Abstract: A combination fastener for attaching a cellular phone base station to a mounting bracket includes alignment and spacing features. The alignment features ensure that a door of the base station will be properly aligned when the door closed. The spacing features ensure that a gasket for the door will be placed under proper compression by the closed door.

Abstract: A mechanical clamp used to secure hoses includes an elongated band. The band surrounds a central region and has a sequence of slots along its length. An adjustment screw has a hexagonal head that rotates about a longitudinal axis and has a thread that extends into the slots. Rotation of the screw adjusts the area of the central region. The head of the screw allows a driver to transfer torque to the head of the screw at an angle from the axis of rotation. The head is either curved or angled to allow a driver to efficiently engage the head of the screw during rotation when placed at an angle to the axis of rotation.

Abstract: A drilling tapping screw includes a head engageable with rotary fastening tool, and a shank extending downward from the head and having a lower end having with a drilling tip, including a tapping and fastening thread defined from the end face thereof to the head. The head includes a pointed projection, an engaging portion engageable with the rotary fastening tool, and a collar. The pointed projection consists of a first tapered portion with a conical top end, a shaft with a fixed outer diameter, and a second tapered portion formed in the wake of the latter. Frame members made of steel are first firmly fastened by the screw, and joined to a wallboard, so that all the head portions except the collar stab the wallboard by striking with a hammer the site where the head is positioned. This temporarily locks the wallboard and prevent any warping of the site where the head is positioned in the wallboard.

Abstract: A fastener comprising an elongated body having a longitudinal axis and an outer surface and first and second ends, a separate seating configuration on the first end, a ridge extending circumferentially about the body adjacent to the seating configuration, a plurality of splines on the outer surface extending from the second end toward the first end and terminating at the ridge, and grooves between the splines extending from the second end toward the first end and through the ridge. The separate seating configuration can be mounted on a knurled surface with which it has an interference fit. A decorative cap can be mounted on the first end of the elongated body.

Abstract: A bone screw comprises a threaded shank having an axis of rotation. A head is integral with the shank, and the head includes a surface disposed generally normal to the axis. A plurality of drive receivers are disposed about the surface wholly remote from the axis. Each of the drive receivers is adapted for engagement with a cooperating driver element of a rotary driver so that the head and thereby the shank may be rotated about the axis.

Abstract: A nut is provided having a tapered, polygonal nut body, an axial coupling hole defined within the nut body, an inner thread provided on the inside of the nut body around the axial coupling hole, the nut body having a tapered, polygonal outside wall axially inwardly sloping from a front end thereof toward a rear end thereof. A socket wrench is provided having a socket integral with one end of a shaft thereof, the socket defining a tapered, polygonal coupling hole for coupling to the tapered, polygonal nut body of a nut, permitting the nut to be turned with the socket wrench.

Abstract: A fastener comprising an elongated body having a longitudinal axis and an outer surface and first and second ends, a seating configuration on the first end, a ridge extending circumferentially about the body adjacent to the seating configuration, a plurality of splines on the outer surface extending from the second end toward the first end and terminating at the ridge, and grooves between the splines extending from the second end toward the first end and through the ridge.

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 screw, particularly a wood screw present a combination of a threaded cylindric stem (10) merging, over an inversely frustoconical part (16) with an enlarged diameter cylindric portion (20) which is integral with an underside of a large diameter washer section (23) which, in turn is integral with a shallowly convex head portion (25). The invention is intended for wood screws usually in the range of about 6 mm and provides a reduced chance of injury by providing a smooth merging with the flat surface on which the screw head is located. Also, the screw has an improved torque characteristics making it suitable for use with power screw driving tools.

Abstract: 216-type screws and KS-type screws are two types of fastening devices typically used to restrict access to the chambers of building entrance protector (BEP) enclosures used in telecommunications applications. Access to such chambers is limited to those users who have special tools designed for one or the other type of screw. The present invention is a screw that can be actuated using either the special tools designed for 216-type screws or the special tools designed for KS-type screws. In particular, screws of the present invention have a hexagon-shaped outer surface like a 216-type screw and a hexagon shaped recess with a cylindrical upstanding post in the middle of the recess like a KS-type screw.

Abstract: The invention concerns a gravestone assembly comprising a base with a gravestone detachably secured thereon by a securing arrangement. Disposed in the base is a threaded spindle which, when a gravestone is not mounted on the base is pretensioned by a spring in a position such that it projects out of the base on the gravestone side and is secured by a stop. As a result, the threaded spindle can be displaced with its upper end, which projects out of the base, against the force of the spring into the base and the foundation tube. In order to screw in the threaded spindle projecting out of the base, the gravestone has a threaded bore in its underside. The threaded spindle also projects downwards out of the base and is designed there such that it can be actuated by a turning device.

Abstract: A ratcheted nut assembly is provided to enable a nut to be tightened onto a bolt in a limited area. The ratcheted nut assembly includes an internally threaded nut that has radially extending teeth on its outer surface. The nut is held rotatably captive within an elongated housing that has a generally "Y" shaped ratchet member pivoted so that the ratchet member may have pawls that are formed on it engaged with the teeth of the nut to rotate the nut. The operator positions the ratchet member into engagement with the radially extending teeth on the nut depending upon which direction the operator desires to turn the nut. The ratchet mechanism remains with the nut after the nut is tightened.

Abstract: The angularly accessible head for a threaded connector comprises a spherical structure having a centered slot therein, the slot having a bottom surface or wall in the shape of an inverted V, with a center point thereof extending toward and terminating below the center of the sphere. The head is functionally accessible from a plurality of planes which are not coplanar with a center plane of the slot.

Abstract: A screw for fastening that includes a male or female screw formed on its inner core area and including threads located about its outer circumference. A flange ring is located generally at one edge of the screw member in a manner so to be free to turn relative to the screw member, with the outside surface of the flange ring being configured to contact an object to be attached. An operating ring is located at the other edge of the screw member with freedom to turn relative to the screw. A screw feed ring is also provided having threads engaged with threads on the outer circumference of the screw member. A holding ring portion is operatively associated with the operating ring and includes an inner surface that is eccentric to its outer surface.

Abstract: A locking system for a vehicle wheel has a threaded member having a threaded part which has an axis and is screwable in a corresponding counter part, and a plurality of rings which are freely rotatable relative to the threaded part and having different eccentricities, and a key having an axis and a part engageable with the threaded member and is provided with a plurality of formations which engage the rings of the threaded member and have eccentricities similar to the eccentricities of the rings.

Abstract: A cross-recessed head screw has in its head a tool engagement recess including first releasing surfaces which are adapted to be engaged with generally flat front edges of an end of a cross-headed tip screwdriver and have the function of moving the screwdriver backward when the screwdriver is turned in the reverse direction for loosening the screw. The tool engagement recess further has second releasing surfaces each contiguous to a corresponding one of the first releasing surfaces and serve to guide the backward movement of the screwdriver as the latter is turned in the screw-loosening reverse direction. By virtue of engagement between the first releasing surfaces and the front edges of the screwdriver, the reverse rotation of the screwdriver produces only a small friction torque which is quite insufficient to cause rotation of the screw in the screw-loosening direction.

Abstract: A threaded fastener having an elongated threaded shaft portion, an enlarged head portion connected in axial alignment to said shaft portion, and a plurality of longitudinal grooves positioned circumferentially around said head portion. The fastener has a longitudinal axis, and the grooves are positioned parallel to this axis. The grooves engage the shaft portion adjacent the head, such that the grooves extend completely from the free end of the head to the point where the shaft is connected to the head. The grooves preferably extend radially toward the longitudinal axis to a depth equal to the outer diameter of the threaded shaft.

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 tamper proof threaded fastener construction (10) comprising a conventional elongated threaded fastener body member (20) having an enlarged head member (30) provided with a contoured and tapered frangible member (40) which is used to drive the fastener construction (10) in a rotatable fashion, and when the frangible member (40) is removed leaves an irregular surface (45) which prevents the fastener construction (10) from being rotatably driven in any direction.