A tool for engaging drive flanks of a threaded nut has a tool body with a central cavity. Cam surfaces are formed in an inner wall of the central cavity. A retainer secured within the central cavity has an outward-facing slot. A jaw for each of the cam surfaces has a curved outer side in contact with one of the cam surfaces and a drive surface on an inner side for engaging one of the drive flanks of the nut. A foot extends inward from a lower end of each of the jaws into the slot to retain the jaws within the central cavity. Rotating the tool body relative to the jaws moves the drive surfaces of the jaws from a retracted position to a gripping position in engagement with the drive flanks of the nut.

Adjustable fastener tools are provided for engaging socket heads. The tool includes a support member, multiple engagement fingers, and an adjustment mechanism. The support member has multiple radially-extending tracks, and a central opening, and the fingers are associated with, and slidable along, the radially-extending tracks. The fingers include at radially inner ends jaws with respective contact surfaces for engaging the socket head. The adjustment mechanism resides, at least in part, within the central opening in the support member, and couples to the fingers. The adjustment mechanism includes an actuating member and multiple hinged trusses. A hinged truss of the trusses is hingedly coupled at one end to the actuating member and hingedly coupled at an other end to a respective finger of the engagement fingers. Movement of the actuating member results, via the hinged truss, in slidable movement of the respective finger along its associated radially-extending track.

A bone fixation pin is inserted into a bone with an apparatus comprising a housing having a proximal portion and a distal portion, the distal portion having an inner surface and an opening configured to receive the bone fixation pin; a drive shaft having a proximal end configured to engage a handle and a distal end; and a body having an axis and a peripheral edge. The body comprises a bore along the axis, the bore being configured to slidably engage the distal end of the drive shaft; and a plurality of evenly spaced slots in the peripheral edge of the body. A plurality of chuck arms move radially along the evenly spaced slots in the peripheral edge of the body, each chuck arm having an inner surface and an outer surface, with each chuck arm being biased toward the axis of the body by a first biasing force. The outer surface of each chuck arm slidably engages the inner surface of the housing. The distal end of the drive shaft and the body are within the proximal portion of the housing, with the body being biased toward the distal end of the housing by a second biasing force. Each chuck arm has an engaging surface configured to engage a head of the bone fixation pin, where pressure applied to the engaging surface drives the chuck arms in a radial direction against the first biasing force, and simultaneously drives the body carrying the chuck arms axially against the second biasing force.

A lug wrench apparatus comprising a collet-type assembly whereby the socket clamps to the lug nut in a manner similar to the way a collet clamps a router bit. The clamping mechanism can be provided either by a screw-compression, or an eccentric cam compression. Arbitrarily large amounts of torque can be applied by means of an extension which fits over the arm of a wrench that is clamped to the shaft of the collet.

A lug wrench apparatus comprising a collet-type assembly whereby the socket clamps to the lug nut in a manner similar to the way a collet clamps a router bit. The clamping mechanism can be provided either by a screw-compression, or an eccentric cam compression. Arbitrarily large amounts of torque can be applied by means of an extension which fits over the arm of a wrench that is clamped to the shaft of the collet.

A bone fixation pin is inserted into a bone with an apparatus comprising a housing having a proximal portion and a distal portion, the distal portion having an inner surface and an opening configured to receive the bone fixation pin; a drive shaft having a proximal end configured to engage a handle and a distal end; and a body having an axis and a peripheral edge. The body comprises a bore along the axis, the bore being configured to slidably engage the distal end of the drive shaft; and a plurality of evenly spaced slots in the peripheral edge of the body. A plurality of chuck arms move radially along the evenly spaced slots in the peripheral edge of the body, each chuck arm having an inner surface and an outer surface, with each chuck arm being biased toward the axis of the body by a first biasing force. The outer surface of each chuck arm slidably engages the inner surface of the housing. The distal end of the drive shaft and the body are within the proximal portion of the housing, with the body being biased toward the distal end of the housing by a second biasing force. Each chuck arm has an engaging surface configured to engage a head of the bone fixation pin, where pressure applied to the engaging surface drives the chuck arms in a radial direction against the first biasing force, and simultaneously drives the body carrying the chuck arms axially against the second biasing force.

A drill accessory that is configured to be releasably secured to a handheld drill wherein the drill accessory is operable to project a straight line light beam in four directions outward therefrom and along an adjacent surface. The drill accessory includes a chuck engagement member that is configured to be inserted into a chuck of a handheld drill. A body is contiguous with the drill engagement member and is cylindrical in shape having a first end and a second end. A light assembly is included and has four lights distributed equidistantly along the outer perimeter of the light assembly. A bearing assembly is intermediate the body and the light assembly and includes a plurality of ball bearings. The bearing assembly is operable to inhibit the rotational movement of the body being transferred to the light assembly so as to maintain the light assembly in a stationary position.

A device for unfastening fasteners includes an operation device, a cable unit and a working unit. The cable unit is connected between the operation device and the working unit. The operation device includes a first part and a second part pivotably connected to each other by a pivot. The first part includes a first extension with a first hole. The second part includes a second extension with a second hole. A first slot communicates with the first hole. A second slot communicates with the second hole. The cable unit includes a cable and a sheath. The cable extends through the first and second holes via the first and second slots, and connected with an end piece which contacts the first extension. A stop member is mounted to the first extension to close the first slot. The cable is separated from the operation device easily without causing damage to the cable.

A tool has a body with an axially extending cavity containing partly cylindrical receptacles. Each receptacle has an opening facing inward toward the axis. A partly cylindrical cam portion of a jaw fits within each of the receptacles. Each jaw has a workpiece engaging portion protruding from the body. Each of the cam portions has a pair of flat flanks that protrude inward from the opening of one of the receptacles. The flat flanks intersect each other at an inner corner. Each flank abuts one of the flanks of another of the cam members. Each of the engaging portions has an outer surface configured to engage a hole within the workpiece. An increment of rotation of the body relative to the jaws causes the inner corners of the flanks to move outward from the axis and the outer surfaces of the engaging portions to move from a contracted position to an expanded position.

A tool has a body with an axially extending cavity containing partly cylindrical receptacles. Each receptacle has an opening facing inward toward the axis. A partly cylindrical cam portion of a jaw fits within each of the receptacles. Each jaw has a workpiece engaging portion protruding from the body. Each of the cam portions has a pair of flat flanks that protrude inward from the opening of one of the receptacles. The flat flanks intersect each other at an inner corner. Each flank abuts one of the flanks of another of the cam members. Each of the engaging portions has an outer surface configured to engage a hole within the workpiece. An increment of rotation of the body relative to the jaws causes the inner corners of the flanks to move outward from the axis and the outer surfaces of the engaging portions to move from a contracted position to an expanded position.