Abstract: A shielded universal joint having a pivot head defining a primary axis. The pivot head has a ball and a neck. The ball has a longitudinal slot. The slot has a throat at the center of the ball. The imperfect socket head is provided having a socket and a pin. The socket defines a secondary axis. The socket has a cavity concentric with the secondary axis. The cavity closely receives the ball. The socket has a continuous margin. The pin is joined to the socket in spaced relation to the margin. The pin extends through the passage. The pin defines a first pivot axis extending longitudinally through the pin. The pin and the throat define a second pivot axis extending through the throat and the pin perpendicularly to the first pivot axis. The socket head is simultaneously pivotal relative to the ball about both of the pivot axes.

Abstract: An apparatus for supporting a machining tool on a robot arm is disclosed having first and second support members with the second support member attached to the first support member by torsion bar elements so as to be movable with respect to the first member about an axis in a single degree of freedom. The first support member is attached to the end of the robot arm and the machining tool is attached to the second support member.The torsion bar element interconnecting the first and second support members has end portions larger than a connecting portion extending between them. One end portion is fixedly attached to one of the support members and the other end portion is fixedly attached to the other support member. The torsion bar elements are generally cylindrical in configuration and are dimensioned such that the diameters of the end portions are between seven and ten times the diameter of the connecting portion.

Abstract: A collet and tool assembly for rotatable tools such as drills and taps in which the collet and tool each include mating:a) stops for limiting entrance of the tool into the holder;b) matching detents for producing an audible click when the tool is properly placed in the collet; andc) matching eccentric sections which provide positive torque transfer between the collet and the tool.

Abstract: A chamfering tool and method for use in the precision backchamfering of a rotating part. The chamfering tool has a cutting head portion selected to match the size of the surface to be chamfered. Behind the cutting head is a shank portion of reduced diameter which connects the cutting head portion to an enlarged portion which supports the chamfering tool in a fixed tool holder. If the part centerline is not aligned with the rotating collet centerline, the part center traces a circular orbit. The shank portion of reduced diameter enables the tool to flex so that the cutting head can follow the part centerline being guided by the part's inner diameter.

Abstract: A drilling unit mounted on an arm of an assembly robot. In order to enable a drill bush of a nose piece, for guiding a drill, to be adjustably moved into exactly registering relation with a bore of a template laid on a workpiece, the nose piece is mounted on a first cylindrical member which is mounted on a second cylindrical member through a first compliance mechanism comprising elastic support members which constitute oblique links of a trapezoidal link mechanism having an imaginary intersection of the oblique links at a front end of the drill bush. The drill bush can therefore make a swinging motion about the intersection. The second cylindrical member is mounted on a guide plate through a second compliance mechanism which enables the second cylindrical member and hence the drill bush to adjustably move in a radial direction of a rotational shaft of the drilling unit.

Abstract: A machining apparatus for machining a work piece wherein the work piece is held above the work stations of the machine tool base so that chips will fall downwardly during machining operations. The tools are successfully indexed to the work station so that chip removal need be accomplished only at a single place and to make the arrangement more compact.

Abstract: A device for drilling an undercut in a borehole in a receiving material comprises an axially extending guide sleeve with an eccentric bore and an eccentric bushing located in the eccentric bore and being rotatable therein relative to the sleeve. A tension spring is located between the sleeve and the bushing. During rotation of the bushing, relative to the sleeve, the torsion spring is stressed. A drive shaft with a cutter head at one end extends through the bushing and is brought into an eccentric position relative to the sleeve and at the same time commences an undercut in the borehole. A lock is provided with a set of teeth on the sleeve preventing rotation of the sleeve with the bushing. When the maximum eccentricity of the drive shaft is established, the lock can be released and the sleeve rotated along with the bushing by an eccentric transmission. During such rotation, a complete circumferentially extending undercut can be formed in the borehole.

Abstract: An apparatus for drilling a circularly curved hole in a workpiece, following a curved path around an arc includes a support, shaped to rest against the workpiece, a chassis mounted to the support on a pivot axis defining a center of the curved path, and a drilling bit. The drilling bit is disposed on the distal end of a shaft which is likewise curved around the path, and is provided with a power transmission section connected to the drilling bit and disposed along the arc, coaxial with the pivot axis of the chassis. An electric motor or electric hand drill with chuck is used to apply power to the power transmission section, while manually forcing the chassis around the pivot axis, thereby moving the drilling bit along the path. The support can be adjustable to span and/or clamp on the workpiece. The power transmission section can include an internal or external member carrying power along a fixed tube or shaft respectively.

Abstract: Curved bore drilling apparatus and methods having a remotely actuated, pivotal rocker arm and cantilevered, curved guide means which guide and advance a cutting means through a predetermined curved path to drill one or more curved bores within a solid material.

Abstract: A method and apparatus for riveting together workpieces which, in their assembled relationship, have non-parallel exterior surface. Apparatus is provided for clamping the workpieces together between an upper clamp pad and a lower clamp pad, the lower clamp pad being mounted on a spherical bearing so that the lower clamp pad can conform to the workpiece surface. The lower clamp pad is provided with a conical aperture which can act as a pilot for tooling. The tooling is also mounted on spherical bearings so that when the lower clamp pad is in contact with the lower surface of the workpiece, and the tooling is moved towards the workpiece. The tooling will be piloted by the conical aperture to be normal to the surface. After the workpieces are clamped together, the workpieces are drilled from the upper surface and the upper surface is also countersunk.

Abstract: A drill bit and chuck for interconnection with the end of a flexible drive shaft which axially and rotationally restrains the drill bit against becoming separated from the chuck during an operation requiring bone drilling, for example. The drill bit drive end has an eccentrically mounted boss with an enlarged head. A collet has an internal wall with an eccentric opening for receiving and locking with the drill bit boss head. The opposite end of the collet is staked onto the flexible shaft.

Abstract: A tap wrench comprising a handle portion and a chuck is provided with a joint arrangement that allows for axial misalignment of the handle portion and the chuck. The joint comprises a stem that extends from the chuck and provides four planar pins equidistantly spaced thereabout which slidably engage four slots equidistantly spaced about a central opening defined in the handle portion. The stem is retained within the central opening by the engagement of each pin in a respective slot. Oscillation of the stem within the central opening provides for the above-noted axial misalignment.

Abstract: A cutting tool for forming undercuts in boreholes includes a cutting member pivotally and rotatably supported in a tubular drive shaft. The combination of the drive shaft and cutting tool provide a ball joint so that the cutting tool is pivotally supported relative to the drive shaft axis. The drive shaft has an guidance bore for the cutting tool. Guidance stop faces in the guidance bore transmit rotational movement to a head forming a cutting member on the cutting tool. The head forms the undercut. The head rolls over the surface to be undercut.

Abstract: An undercutting drill for obtaining a drill hole with a conical undercut. A drill shaft is provided connected in an articulated manner through a housing and containing a universal joint to a clamping shank. The face of the housing facing the joint. The drill shaft is provided with a plate having a stopping face, the vertical centerline of which is tilted in relation to the longitudinal axis of the drill shaft.

Abstract: A curved bore hole drilling apparatus and method utilizing two power driven drill shafts equipped with flexible shaft sections on the distal ends thereof with each flexible shaft section having a cutting tip. A semicircular channel shaped drill guide loosely engages each flexible shaft end section and is caused to rotate through an approximate 90.degree. angle as the cutting tips are advanced. The drill guides are pivotally mounted for rotation in substantially the same plane end, when rotated through an approximate 90.degree. angle so as to meet, the cutting tips of the associated rotating flexible drill bits form a curved semicircular bore hole which may extend through 180.degree.. The flexible shaft sections and guides are then backed out of the bore and the bore may be used for attachment of a tie such as a wire or a suture which is passed through the bore.

Abstract: A multi-spindle drilling machine for simultaneously drilling a plurality of holes, in particular suitable for drilling a plurality of tiny, closely-spaced holes, comprising a drivable drive wheel coacting with a plurality of friction wheels, each connected to a flexible spindle, whose ends away from the friction wheels extend through bores in a spaced apart spindle guide block. Said bores correspond with opposite bores in a drill guide block and are disposed in accordance with the pattern of the holes to be drilled. A coupling arrangement is provided in the space between the drill guide block and the spindle guide block for connecting the shanks of drill bits placed in the bores of the drill guide block to the spindles.

Abstract: A self-normalizing compliant drive coupling (10) having a constant-velocity joint (12) attached to a unidirectional clutch (14) to accommodate axial misalignment of a drive shaft attached to the body (16) of the joint (12) and a driven shaft grasped by the clutch (14). A housing (26) has a cylindrical top portion (28) with a top axial bore (30) for receiving a stem (18) of the joint (12) and a bottom axial bore (34) for receiving the clutch (14). A resilient sleeve (42) encloses the joint (12) and rests on a shoulder (40) on the housing (26). A collar (44) slides over the joint body (16) to bear against the top surface (43) of the sleeve (42) to place the sleeve (42) under a compressive load that urges the clutch housing (26) into axial alignment with the body (16) of the joint (12).

Abstract: A hand-held drill is provided that has a pneumatically operated drill motor. A portion of the air that operates the drill motor is directed against the drill motor housing to slidably move the housing within an outer casing to provide a constant feed of the drill bit. The feed rate is controlled by a rate limiter axially aligned with the drill motor and including a piston attached to the drill motor, the piston being mounted within a cylinder filled with hydraulic fluid. The piston has a bore formed through it that permits flow of hydraulic fluid through the bore and a flow control valve is placed within the bore that controls the flow of fluid through the bore to limit the rate of movement of the piston through the hydraulic fluid and thereby control the rate of movement of the drill motor through the casing. Preferably, the drill includes a vacuum collar surrounding the drill bit to remove dust and material particles from the workpiece.

Abstract: A cartridge case trimming device having mounted on a base a horizontally movable case carriage and case cutting device; the carriage includes cradle, trough, carriage groove, case retainer and toggle clamp; the cutting device includes an arbor head whose height is finely adjustable and an arbor shaft carrying at one end a combination chuck and cutter and on the other end a flexible coupling attached to a motor shaft.

Abstract: The invention provides a holding device for a reamer tool in a machine tool, which comprises a tool holder adapted to be secured to the machine tool for rotation about a longitudinal axis, a tool receiving bushing radially displaceably guided in the tool holder, and a coupling providing a non-rotational connection between the tool holder and the tool receiving bushing. The coupling comprises a coupling disc having two radial end faces, a first one of the coupling disc end faces cooperating with a radical end face of the tool holder, a second one of the coupling disc end faces cooperating with a radial end face of the tool receiving bushing, at least a part of the coupling disc end faces and of the tool holder and tool receiving bushing end faces being configurated as planar gliding surfaces, and pairs of the gliding surfaces facing and contacting each other for transmitting axial pushing forces to the reamer tool.

Abstract: A flexible extension tool for use with a conventional socket and ratchet wrench or the like comprising a helically wound flexible cable with end caps and rotatable conventional male and female connectors extending therefrom wherein the extension tool can be manually held in a highly bent configuration as a plurality of tongue and grooved cylindrical elements confined to the interior of the flexible housing spin therein during use thus transmitting torque. Each element consists of a cylindrical cross-sectional member with a centrally positioned radial groove at one end and an orthogonal centrally positioned radial curved tongue at the other end and a plastic washer or ring spacer positioned circumferentially thereon and coaxial to the helically wound flexible cable, thus partially occupying the annular space between the helically wound flexible cable and torque transmitting element resulting in smooth, low friction transmission of applied torque.

Abstract: In a multipurpose machining unit with pneumatic spindle feed, driving is performed, starting from a motor unit (12), directly or via a flexible shaft (9). An interchangeable gear set (4) makes it possible to select the number of revolutions of the tool in accordance with its purpose. In this connection, for simultaneous use, an arbitrary number of gears (5, 6) is provided. The gears (5, 6) of the gear set (4) can be plugged together in coaxial series. The driven side of the motor unit (11) can be plugged together with the machining unit directly or by way of at least one gear (5, 6) or by way of a connecting coupling (8) for a flexible shaft (9) into a rotational connection. With the use of such a machining unit, individual spindles can likewise be operated economically.

Abstract: A chuck has a rear chuck part centered on a rear axis and adapted to be secured to the spindle of a drill for rotation about the rear axis, a front chuck part centered on a front axis, and a universal joint interconnecting the two parts for joint rotation about the rear axis with the front axis movable between a position on the rear axis and a position with the front axis intersecting and skew, that is nonparallel, to the rear axis. Jaws on the front chuck part can be radially displaced thereon relative to the front axis to clamp a tool--a tap or drill bit--at the front axis in the front part. A locking element carried on one of the parts is engageable with the other part for holding the parts with the axes coaxial and nondisplaceable relative to each other.

Abstract: A right angle extension drill is provided and consists of an adjustable right angle drive unit removably connectable to a portable power unit so that the power unit can drive the right angle drive unit for drilling holes within various materials. Extension poles can be used so that the right angle unit can reach a side of an overhead beam to drill a hole therein. The uppermost extension pole can be curved at its distal end which is connected to the right angle drive unit so that it will drive holes perpendicular to a ceiling from a position either above or below the ceiling.

Abstract: An apparatus and method for resurfacing valve seats in a cylinder head are based upon utilizing a modified constant velocity universal joint of the type used in front wheel drive automobiles. A valve seat resurfacing cutting tool is driven at a constant velocity by the universal joint. Use of such joint allows the series of valve seats having parallel valve stem guide holes to be resurfaced after bringing the axis of one of the corresponding valve stem guide holes into a precise vertical position.

Abstract: A device for honing workpieces. The device includes a rotatable and axially reciprocating honing tool which is guided by an upper and a lower end section in corresponding bearings of a workholding fixture, and also includes a drive rod between the honing tool and a machine spindle. This drive rod is flexible in the radial direction, which prevents out-of-balance at high rotational speeds of the honing tool as a result of excessive mass and excessive play in pivot bearings, while the associated uncontrolled vibrations are also prevented.

Abstract: A tool holding member is coupled to a driving or spindle member by a lug-and-slot universal type coupling member. The three members are held against axial separation by a pair of resiliently yieldable retaining rings which coact with the coupling member to allow the tool holding member to float radially relative to the spindle member. Means are provided for locking tools of various diameters in the tool holding member while providing a positive drive between the holding member and the tool.

Abstract: A collet chuck assembly used for the attachment of a tap to the spindle of a tapping machine is provided. A bore for insertion of the base end of the tap is formed in the lower portion of a cylindrical portion, and at least one O-ring is mounted on the inner wall of the bore such that it is open to view on the inner peripheral face thereof. With the O-ring, the tap is held in place so as to prevent it from slipping down, and is supported somewhat floatingly within the bore in the diametrical direction. The cylindrical portion is provided therein with a pair of locking faces for locking the prismatic portion of the tap in place so as to inhibit any turning thereof and with a pair of steps or a set screw for controlling the amount of insertion of the tap thereinto.

Abstract: A portable power tool includes an elongate body portion and a head portion at one end which includes an implement holding chuck. The head portion may be pivotally displaced with respect to the body portion. This is accomplished by the use of a swivelable joint of the ball and socket type between the body portion and the head portion and by an angular coupling in a driving connection between an electric motor in the body portion and the chuck in the head portion. The body portion includes a hand gripping portion of such girth as to provide a comfortable and secure grip by a human hand. The electric motor is disposed within a region of the body portion comprising the hand portion. The electric motor may be driven by a battery.

Abstract: The present invention relates to a lead screw threading tool utilized to form external threads on the upper end of a cylindrical shroud of a shock absorber assembly of a vehicular suspension system. The tool includes an expandable collet which is inserted into one end of the shroud for maintaining a lead screw arbor in axial alignment with the interior opening of the shroud. The lead screw arbor is utilized for mounting a driver unit for longitudinal movement along the axis of the arbor. A thread forming die is fastened to the driver unit in such a manner so as to permit limited radial movement of the forming die relative to the axis of the arbor. The limited radial movement of the threading die permits the die to properly seat on the outer wall of the shroud in the event there is a variation in concentricity between the inner and outer walls of the cylindrical shroud.

Abstract: An adjustable power transmitting device comprising a rotary input shaft mounted for rotation about a first axis and an output shaft mounted for rotation about a second axis. The output shaft is also mounted for pivotal movement about at least two non-parallel axes so that the position of the output shaft can be adjusted about both of these axes. The input shaft is drivingly coupled to the output shaft so that the input shaft can rotate the output shaft in all positions of the output shaft about the two non-parallel axes.

Abstract: A floating tool holder including a cylindrical shank having a recess in one end thereof, floating structure including in different modifications an outer race or a torque washer and a tool receiver positioned within the recess and held in radially spaced relation to the recess walls by resilient O-rings whereby radial translation of the tool receiver with respect to the shank and pivotal movement of one end of the tool receiver within and relative to the shank are permitted, tool adapter structure received within the tool receiver, and means for releasably securing the tool adapter structure to the tool receiver.In another modification, the floating tool holder includes telescopic, resiliently biased compression structure received over the shank thereof. The floating tool holder may be further modified by a quick-release coupling for securing a tool adapter to the tool receiver portion of the floating structure.

Abstract: A method for connecting a lateral sewer line to a main sewer line which is relined with a plastic pipe liner, comprises plugging a lateral sewer line upstream of the main sewer line to seal off the lateral sewer line, spraying a grout material downstream of the location of the plug until the space between the main sewer line and the plastic pipe liner is filled, allowing the group material to set, removing the plug from the lateral sewer line and providing an opening through the grout material and the plastic pipe liner so that the lateral sewer line is connected to and in communication with the plastic pipe liner. An apparatus which is used to plug the lateral sewer line and dispense the grout material comprises a spray gun positioned within a tubular inflatable bladder where the nozzle for the spray gun is in front of the bladder. The apparatus also includes means for conveying compressed air to and for conveying compressed air from the inflatable bladder.

Abstract: A boring tool specifically designed for operation in a limited space consisting of an elongated tubular handle in which a drive shaft operates, power means on one end of said handle for driving said shaft, a universal joint connected to the drive shaft and housed in a bearing case. The case being formed in two parts, one part, the angular imparting part, being formed with a tubular extension and said one part having a flat upper surface and the opposite surface thereof extending angularly with respect thereto, the angle being greater than a 90 degree angle, the universal joint extending through the opposite surface. The other part of the case being attachable to the opposite surface of said one part and assuming the angle thereof. The rotatable shaft from the universal joint extends through the other part for the attachment thereto of a bit which extends at an angle to the elongated handle which is the same as the angle of the opposite surface relative to the elongated handle.

Abstract: A Floating Tool Holder includes a shank having an annular sleeve secured to one end thereof, there being a tool chuck assembly retained between the end of the shank and a flange on the sleeve, driver means for transmitting rotary motion from the shank to the tool chuck assembly, there being a pair of annular bearings which engage the tool chuck assembly and enable slight relative radial movement, the bearings having flat surfaces which constitute a thermal diffusion of a metal boride, such as di-iron boride. There is a seal between the tool chuck assembly and the sleeve, and centering means acting between the shank and the tool chuck assembly and constructed to enable the conducting of a coolant through the shank into the tool chuck assembly, certain components being further constructed to enable length of the device to be minimized. The tool chuck assembly has a deep hole receptive of a substantial portion of a tool.

Abstract: A depressed drill assembly and vibratory work piece support for abrasive cutting in a zone immersed in liquid with or without abrasive grit, wherein vertically disposed excursions aligned with the gravitational axis of the drill assembly intermittently lifts the latter for access and entry of said grit and/or liquid into the cutting zone intermediate the drill and work piece, whereby holes are accurately cut through gemstones and the like.

Abstract: A manually operable boring apparatus powered by compressed air drills precisely located pilot holes in cabinet doors to assist in the installation of apertured cabinet hinges. Upon the command of an operator, the hole boring apparatus causes a drill assembly containing three rapidly rotating drill bits to extend one-quarter inch into the rear face of a cabinet door. The boring apparatus further includes a bracket and retractable indexing pins which locate the drill bits a predetermined distance from the end of the cabinet door.

Abstract: Disclosed is a method and apparatus for repairing a buried main having connected lateral service conduits. In the method, a main is opened and cleaned of debris. Thereafter, an elongated conduit liner is axially inserted into a length of the buried main. The lateral service conduits are opened and cleaned from a point remote from their connection to the main. A dispenser is axially inserted through the service conduit to a point adjacent to the connection. At the connection, polyurethane material is dispensed into a portion of the service conduit and in the annular space between the main and the liner. Thereafter, the dispenser means is removed from the service conduit and the polyurethane material is allowed to set. A cutter apparatus is axially inserted into the service conduit and is manipulated to form a port through the polyurethane material and the wall of the liner to connect the service conduit to the liner.

Abstract: A floating tool holder for a reamer or like tool characterized in that a shank member with respect to which a tool drive member has a floating drive connection has a centralizing pin fixed therewithin which provides a spring centering device to yieldably position said drive member coaxially of said shank member, and which axially retains said drive member for lateral floating movement without axial play.

Abstract: A reamer held in its required non-rotative condition for effective reaming by a rearwardly disposed key and key way construction, and wherein an elastomeric ring in encircling relation about the reamer maintains, without adverse effect on the holding function of the key and key way, the key in a clearance position within its cooperating key way, to thereby permit adjusting movements in the reamer to correct for misalignment between the reamer and the drilled hole to be reamed.

Abstract: A compression tool holder for use with deburring tools or the like, the tool holder having a cylindrical outer housing adapted to be inserted into a chuck of a rotary drive machine. A tool holding rod is axially slidably mounted in a cylindrical recess formed in the tool holder. A spring loaded piston is mounted behind the rod and urges the rod to its extended position. A cap member, however, defines the limit of the extended position for the rod. The rod has an outside diameter somewhat smaller than the inside diameter of the cylindrical recess in the tool holder so that the rod may compensate for misalignment by pivoting relative to the housing within the cylindrical bore, utilizing the cap member as the fulcrum point for its pivot. The end surface of the piston coacts with the end surface of the tool holding rod so as to return the tool holding rod to a central aligned position when misalignment compensation is not required.

Abstract: A universal floating tool holder adapted for floatingly holding tools and particularly adapted for holding a tap for a tapping tool. The toolholder embodies telescoping bodies with a clutch in between the two bodies. Also between the telescoping bodies there are provided resilient means preferably in the form of O-rings. Provision is made for a limited amount of relative axial movement or displacement between the two bodies sufficient for clutch disengagemeent. The resilient means between the two bodies allows for relative radial or lateral float or displacement of one body relative to the other. The outer telescoping body holds the tool which may be attached in a chuck.

Abstract: An adjustable power transmitting device comprising a rotary input shaft mounted for rotation about a first axis and an output shaft mounted for rotation about a second axis. The output shaft is also mounted for pivotal movement about at least two non-parallel axes so that the position of the output shaft can be adjusted about both of these axes. The input shaft is drivingly coupled to the output shaft so that the input shaft can rotate the output shaft in all positions of the output shaft about the two non-parallel axes.