Abstract: A cutting-tool insert having a cutting edge at the periphery of at least one of its side faces, and a plurality of serrations in the cutting edge. The side faces of the insert are formed with a plurality of recesses between its center and the cutting edge. The plurality of recesses are spaced from each other around the center of the side face, and are also spaced from the serrated cutting edge, to define a margin between the cutting edge and the recesses extending continuously along the length of the cutting edge following the serrations. Also described is a cutting tool using such inserts.

Abstract: The present invention includes a radial force detection mechanism for detecting a radial force generated by cutting operation of a cutting tool by use of an ultrasonic vibrator, a depth-of-cut feed mechanism for moving the cutting tool in the depth-of-cut direction, and a vertical feed mechanism for controlling the vertical position of the cutting tool, combined with correction of its movement in the depth-of-cut direction by the depth-of-cut feed mechanism, so as to bring it to the position where a radial force detection signal detected by the radial force detection mechanism becomes zero. By moving the cutting tool in the vertical direction by use of the vertical feed mechanism so that the radial force detection signal may become zero, no radial force is applied to the cutting tool.

Abstract: There is disclosed a tool for the removal of locking collars of the frangible fasteners used in the aerospace industry, particularly for removal of fasteners installed in close quarters such in a deep channel where conventional tools cannot grip the collar. The tool has a collet-type chuck to grasp the collar of the fastener and has a lead screw to lock the collet chuck about the collar and permit removal of the collar. For this purpose, the collet chuck has a cylindrical neck which is received within a sleeve. The lead screw is received in the opposite end of the collet sleeve and is threadably engaged in the internally threaded bore of the collet chuck member, preferably with left hand threads, and has a head with wrenching flats. The lead screw has a central axial through bore which receives a key member which is used to immobilize the stud or bolt of the fastener system. A disk member is slidably received within the collet sleeve to eject removed collars from the collet chuck member.

Abstract: A drain plug removing device includes a clip for rotatably engaging and selectively holding a head of a threaded drain plug. The clip has an axis of rotation and includes a pair of openable jaws urged together by a spring. The device includes a selectively bendable, flexible shaft attached to the clip at one end thereof, the shaft being formed of a reboundable coil spring extending away from the clip along the axis of rotation of the clip when the shaft is in an unflexed configuration. The shaft has a handle at another end thereof opposite the clip, such that rotation of the handle applies rotational force to the shaft, which in turn applies rotational force to the clip to cause rotation of the clip and a drain plug held therein. A drain plug can be removed from a crankcase oil pan with the device of the invention without spilling oil onto the fingers and without dropping the plug into a drainage catch basin or funnel beneath the oil pan.

Abstract: An adjustable length extension tool is disclosed for interconnection between a driving tool, such as a socket wrench, and an object to be driven, such as a screw or bolt. An extension housing body includes a shaft that can move reciprocally within a bore therein; one end of the sleeve member includes a box opening for interconnection with the driving tool and one end of the shaft includes a box pin for interconnection with a socket. An adjustable compression sleeve is received around the shaft to limit the movement and drag of the shaft within the bore thereby providing infinite length adjustability.

Abstract: The invention relates to a device for setting fastener elements or pins, particularly to a screw-setting device. The device comprises a housing in which a retainer shaft for a setting tool is mounted at least for axial displacement, at least one advance drive mechanism within the housing and adapted to be connected to the retainer shaft, a switching sleeve mounted for displacement together with the retainer shaft and defining at least one switch-off point, at least one sensor device supported in the housing for defining the switch-off point, and an adjustment mechanism for adjusting the switch-off point. In known devices of this type, the accurate and rapid adjustment of the switch-off point is difficult. According to the invention the adjustment mechanism is provided within the housing between the switching sleeve and the retainer shaft.

Abstract: A rotary tool generating head with radial tool slide feed-out produced by differential rotation of central shaft. A harmonic drive gear having a stationary axle and a servo motor driven rotary axle is used to produce zero feedout of the radial slide when the servo driven axle is stationary. Servo controlled radial tool displacement occurs through rotation of the servo driven axle with a substantial reduction in rotational speed with respect to the stationary axle, e.g., in the order of 97:1.

Abstract: A cutting tool having a cutting tool insert which is automatically rotationally indexable and including a shank and an indexable cutting tool insert rotatably connected to the shank, the insert including a plurality of cutting edges and side surfaces therebetween, the cutting tool is also provided with an indexing device, lock pin, cam plate and eccentric cam pin, wherein the indexing device comprises a sliding key and a pair of indexing legs attached thereto for engaging a serrated portion of the lock pin to which the cutting tool insert is attached for indexing the insert on the lock pin upon rotation of the cam pin which effects a lateral movement of the cam plate along the longitudinal axis of the shank whereby the cam plate engages the sliding key causing it to also move laterally to engage the indexing legs on the lock pin and the cutting insert attached thereto.

Abstract: A screwdriver comprising a handle with a central toothed recess formed thereon and a blind hole concentrically formed thereunder and having two retaining projections projecting therefrom, a speed change gear train disposed between the retaining projections, a spindle with a primary gear, constituting the gear train in part, integrally formed thereon and the lower end thereof received in the blind hole, a housing with an engaging device to engage with the driving gear of the gear train disposed around the gear train, a cover having a central bore formed therethrough screwed on the housing, and a sleeve of which the diameter thereof is less than the bore and of which the lower end engages with the upper end of the spindle and the upper end receives a shank which has a driving bit formed thereon. Thus, the rotation of the housing is transmitted to the driving bit via the speed change gear train with a higher speed.

Abstract: A tool holder for holding a replacable tool bit having a body part and a cutting edge, the tool holder having a body provided with first and second clamping members which co-operate, in the use, to clamp the tool bit to the body, the first clamping member having a tool bit engageable portion for engagement with the body part of the bit, a fulcrum portion in engagement with the tool holder body and a load applying portion whereat a load is applied to the first clamping member to cause the member to pivot about the fulcrum and so urge the bit, in use, towards the second clamping member. In one version the tool bit is of polygonal shape in side elevation and has a cutting edge at each corner of the polygon, so that a selected one of the cutting edges may be brought into an operative postiion relative to the tool holder by rotating the bit about the first clamping member so that the selected edge is presented to a work piece for cutting engagement therewith.

Abstract: A tool is clamped to a holder by a clamping mechanism carried by the holder. The clamping mechanism includes a plurality of clamping jaws having longitudinally extending shanks. The clamping jaws are actuated by a longitudinally reciprocable drawbar carried by the holder. The jaws are normally spring-biased to laterally inward, non-clamping positions and are actuated to a clamping position by means of a longitudinally movable drawbar carried by the holder. Actuation of the jaws occurs in a two-phase operation. In an initial phase, the shanks are displaced laterally outwardly so as to overlie a shoulder of the tool. In a subsequent phase, the shank is moved longitudinally into contact with the tool shoulder to clamp the tool against the holder.

Abstract: A cutting tool comprising a supporting base and an outside and an inside abrasive grain layer projecting concentrically from the supporting base in a radially spaced relationship, and a method for its production. The outside and inside abrasive grain layers are formed by electrodepositing abrasive grains on the supporting base and then dissolving part of the supporting base. The inner circumferential surface of the projecting portion of the outside abrasive grain layer and the outer circumferential surface of the projecting portion of the inside abrasive grain layer are smooth surfaces.

Abstract: Apparatus for rotating a tubular well element about its longitudinal axis. There are first and second elongate casing sections pivotally connected to each other at a pivot. First and second driven sprockets are mounted, respectively, on the casing sections at locations remote from the pivot. A drive sprocket, mounted on the first casing section, is driven by a motor-gear assembly. A continuous chain is mounted around the drive sprocket, and around the first and second driven sprockets, having an inverse internal portion adapted to receive and directly contact the tubular well element to be rotated. Cylinders are connected between the casing sections to pivot them toward and away from each other and thus alternately clamp the inverse internal portion around the wall element, and release such element from the inverse internal portion. One end of each cylinder is pivotally connected to the first casing section at a point between the pivot and the first driven sprocket.

Abstract: An open end wrench and a socket wrench are described which are selectively adjustable to rotate fasterners dimensioned pursuant to the English system or the metric system. Both wrenches compris first and second elements having parallel surfaces spaced apart to engage flats, of a given width, on a fastener. Parallel linkage means control relative moventment of the two elements between first and second positions. In the first position, the linkage is parallel to the flat engaging surfaces and the flat engaging surfaces thereof are spaced for rotation of a fastener having flats of the given width. In the second relative position of the elements, the linkage means is generally normal to the flat engaging surfaces and the flat engaging surfaces thereof are offset, with one surface of the first element being laterally spaced from one surface of the second element a predetermined lesser distance for rotation thereby of a fastener having flats of a width approximately said lesser distance.

Abstract: Locking fasteners for pivotal tools which will not loosen during use and which apply a constant pressure between pivotal tool members. A pivot screw is provided with a holow inner bore in which a securing screw is inserted to cause binding engagement with a portion of the wall formed by the opening in which the pivot screw is inserted. In one embodiment, the securing screw causes expansion of the pivot screw shaft. In another, the securing screw actuates a compressible member which engages the wall. In the event of looseness between the two pivotal parts as a result of shock or for any other reason, the securing screw may be actuated to permit tightening or readjustment of the pivot screw.

Abstract: A device for engaging and prying open J-nut clips of various shapes and sizes from a locked position on an automobile body part to permit easy removal thereof without damaging the same. The device having first and second handle members pivotally coupled together. The distal end of the first handle member having a U-shaped gripping member and the distal end of the second member having an upwardly extending portion for gripping and prying apart a J-nut clip.

Abstract: A turning machine which is used preferably for machining spatially complicated shapes. In order to achieve further machining possibilities, apart from the known adjusting possibilities and machining possibilities by means of a universal rest, the spindle head, alternatively or in addition hereto, is mounted on a machine bed in a longitudinally displaceable manner, if necessary in a transversely displaceable manner, an in a swivelable or rotatable manner.

Abstract: An improved hydraulic pulse wrench provided with a hydraulic pulse generator has a liner, an anvil rotatably mounted in the liner and having a longitudinal slit, and two blades loosely mounted in the longitudinal slit. The liner has an elliptic hole. The two blades have their outer edges beveled in different directions. The anvil has a pair of axial ridges and the liner has on its inner periphery a total of five axial ridges. The blades, anvil and liner cooperate with one another to form pressure chambers while the liner is rotated.

Abstract: A workpiece transport for machine tools and comprised of articulated inner and outer lever arms, the inner lever arm received in a base socket secured to the machine tool, and the outer lever arm pivotally carrying a workpiece support, the articulating axes being vertical and parallel and the workpiece being roughly and finely adjustable into axial alignment with the machine tool, and the workpiece supporting being adjustable to workpiece configuration.

Abstract: A torque wrench comprising an Allen wrench, a read-out member and a holder member for securing the dial to the Allen wrench. Bending of a portion of the wrench, as measured by the read-out member, is indicative of applied torque.