Abstract: An end effector comprising: a driving roller and presser rollers configured to hold a threaded member; a motor; a linear guide and an air cylinder including a rod configured to move the threaded member linearly along the axis of the threaded member; a detector; a robot arm; and a controller configured to: provide the threaded member near a position coaxially facing a threaded hole member by controlling the robot arm based on the position and the direction of the threaded hole member detected by the detector; and insert and screw the threaded member into the threaded hole member by controlling: the air cylinder including the rod to advance the threaded member toward the threaded hole member and insert a tip of the threaded member into the threaded hole member; and the motor to rotate the threaded member about the axis of the threaded member.

Abstract: A lawn trimmer including a cutting disc, a drive shaft; and a flexible drive shaft. The drive shaft is within a straight shaft, connected to the motor and extending to the flexible drive shaft, translating the rotation of the motor to the flexible drive shaft. The flexible drive shaft is within a curved shaft, parallel but not-colinear with the straight shaft, extends to a rotor head connected to the curved shaft, translating drive shaft rotation to a cutting disc comprising a plurality of cutting blades on a cutting plane; an intersection between the cutting plane and the curved shaft axis defines a predetermined oblique angle.

Abstract: A driving shank assembly includes a tube, a drive head, a connector, two quick release nuts, and two fastening caps. The tube has two mounting portions each provided with a mounting recess for mounting the drive head and the connector respectively. The two quick release nuts are locked onto the two mounting portions of the tube respectively. The two fastening caps are locked onto the two quick release nuts respectively. Each of the two fastening caps has interior provided with an inner stepped edge. The drive head is provided with a stepped positioning edge abutting the inner stepped edge of one of the two fastening caps. The connector is provided with a stepped positioning edge abutting the inner stepped edge of the other one of the two fastening caps.

Abstract: A tool for inspecting an annular section of an engine includes a first segment extending along a first lengthwise direction between a forward end and an aft end; and a second segment extending along a second lengthwise direction between a forward end and an aft end, the forward end of the first segment pivotably coupled to the aft end of the second segment and the first segment moveable relative to the second segment between a bent position and a coupled position, the first lengthwise direction defining a coupled angle with the second lengthwise direction when the first segment is in the coupled position relative to the second segment. The tool also includes an adjustment member operable with the first segment, the second segment, or both to adjust the coupled angle defined by the first lengthwise direction with the second lengthwise direction.

Abstract: A method and apparatus for truing a cartridge case with an apparatus including a frame defining a chamber and having a central axis, and a cartridge sleeve defining a cartridge passage with a passage surface for engaging the exterior surface of the body of the case, and a tool extending along the central axis of the frame with a tip end extending into the chamber. The frame may include a tool mandrel portion configured to mount the tool on the frame, and a sleeve mandrel portion configured to mount the cartridge sleeve on the frame. The sleeve mandrel portion may permit the cartridge sleeve and a cartridge case mounted thereon to translate with respect to the frame along the central axis of the frame, the sleeve mandrel portion permitting the cartridge sleeve and a cartridge case mounted thereon to rotate about the central axis with respect to the frame.

Abstract: A surgical instrument for operating hip joint osteoarthritis in a human patient is provided. The hip joint comprises an acetabulum, being a part of the pelvic bone, and a caput femur, being the proximal part of the femoral bone. The surgical instrument is adapted to assist in the operating of the hip joint osteoarthritis from the abdominal side of the pelvic bone of said human patient.

Abstract: A surgical pelvic drill for operating hip osteoarthritis adapted to create a hole in the pelvic bone of a human patient is provided. The pelvic drill is adapted to create a through-going hole placed in the acetabulum area from the abdominal side of the pelvic bone of the human patient. The pelvic drill comprises: a driving member, a bone contacting organ in connection with said driving member, an operating device adapted to operate said driving member. The bone contacting organ is adapted to create a hole in the acetabulum area starting from the abdominal side of the pelvic bone through repetitive or continuous movement. A surgical and a laparoscopic/arthroscopic method of using said pelvic drill is further provided.

Abstract: The present invention features new methods, apparatuses and devices for fixing adjacent bone segments, segments of a bony structure and adjacent vertebrate of a spine. The methods, apparatuses and devices utilize a new apparatus for forming a channel in a surface of the bone or bony structure segments or adjacent vertebra or a channel submerged within the bone or bony structure segments or adjacent vertebra. In more particular embodiments such apparatuses and methods including forming an arcuate channel and which channel can receive therein a curved rod or implant member, which also preferably is arcuate, and avoids the associated problems with prior cage or straight rod and screw systems. Also featured are systems, apparatuses and methods for repairing, replacing or augmenting the nucleus and/or annulus of a disc.

Abstract: An extension assembly configured to permit a user to drill a hole through inaccessible areas in a wall is disclosed. The extension assembly includes a flexible, solid core rod having first and second ends and a holding means. The rod is configured to extend through a hole in a wall cavity and flex therein to position a tool bit at an inaccessible location in the wall cavity and permit a user to drill a hole through a substrate at the inaccessible location. The holding means is secured to the second end of the rod for releasably holding a tool bit for rotation with the rod and includes a sleeve adapted to slide axially along a body of the holding means between a secured position where a tool bit is securely held within the holding means and a release position where the tool bit is released from the holding means.

Abstract: The fastener drive tool is a hand powered drive device that is used to drive fasteners around an axis. The fastener tool device is formed in the shape of a cylinder. The first end of the fastener drive tool is designed to receive driver bits designed for use with power drills, including, but not limited to, 6 point, 12 point, flat head, Phillips head, and star driver bits and driver bit sets. The second end of the cylinder is designed to receive a square driver bits commonly used for driver sockets. Optionally, the first end and the second end can be fitted with a ratchet device. The fastener drive tool comprises a flexible steel wire, a rubber covering, a woven steel lube, a first driver port, and a second driver port.

Abstract: In one aspect, an instrument for placing a graft, implant and/or graft material at a target site for enhancing posterolateral fusion between two or more vertebrae is provided which includes a housing and an actuable trigger associated with the housing. A curved rigid access tube extends from the housing, the access tube terminating at a distal end. A sheath is disposed about, and moveable relative to the access tube, and a transmission is disposed in the housing. In an initial state, the sheath extends distally past the distal end of the access tube, a space being defined within the sheath distally of the distal end of the access tube to accommodate the graft, implant and/or graft material. The transmission is configured to cause an incremental displacement of the sheath relative to the distal end of the access tube upon an actuation of the trigger.

Abstract: Devices and methods for creating holes in the articular process of the vertebra are provided. One embodiment of the invention comprises a drill head comprising a frame, punch arm with punch tip and opposing plate. Methods of using the resulting holes to anchor or stabilize facet joint prosthesis, and also altering the spacing and motion at the facet joints of the vertebral column, are provided.

Abstract: A system for repairing cartilage includes a trephine having a passage extending along a longitudinal axis of the trephine. The trephine has a distal end and a proximal end. The distal end includes a cutting member operable to cut a cartilage plug from a donor site. The passage is operable to receive the cartilage plug. Also, the trephine is flexible to selectively move between a first position in which the longitudinal axis is substantially linear and a second position in which the longitudinal axis is nonlinear. Moreover, the system includes a guide tool that is removably coupled to the trephine. The guide tool is operable to selectively move the trephine between the first and second positions. In addition, the system includes an ejector tool that ejects the cartilage plug from the passage toward a defect site.

Abstract: A hand-held tool gear mechanism unit includes a drive gearwheel, an output gearwheel, and a connecting unit. The output gearwheel has a rotational axis spaced apart radially from a rotational axis of the drive gearwheel. The connecting unit is configured to transmit a rotational movement from the drive gearwheel to the output gearwheel substantially without a step-up transmission ratio. The connecting unit is configured to couple the drive gearwheel and the output gearwheel such that they can be moved relative to one another about a pivot axis.

Abstract: A machining apparatus for grinding, milling, polishing or the like of a dental workpiece. The machining apparatus contains a machining tool, a housing to which the machining tool is mounted rotatably about an axis of rotation relative to the housing, and a holding device to which the housing is fixed. The housing is mounted yieldingly movably to the holding device in dependence on forces exerted on the machining tool.

Abstract: A minimally invasive and particularly small apparatus for drilling into bone and for providing for delivery of medical treatment is provided. The directional drilling apparatus includes a miniature shaft, a bit, first shaft-mounted thrust ring, second shaft-mounted thrust ring, a tubing jacket surrounding the shaft and intermediate the first and second shaft-mounted thrust rings, and a guide tube encapsulating the tubing jacket. As a result, a hole, targeted towards a cancerous lesion within the bone, is possible. After removal of the shaft and the tubing jacket, treatment may be introduced through the particularly small passage created by the directional drilling apparatus or through the passage via a capillary inserted through at least a portion of the guide tube and the passage, which guide tube may include a hypodermic needle.

Abstract: An assembly includes a quick-release head, a tail piece and a flexible metal rod. The tail piece includes a shaft and a male coupler formed of a head, body, and flute. At least a portion of the male coupler head has a reduced outer dimension relative to an outer dimension of the body. When the male coupler is mounted in a second quick-release head or drill, a clearance space is provided between the reduced outer dimension portion and the second quick-release head or drill. During use, the assembly may undergo bending which results in significant forces applied in particular to the male coupler head. By providing the clearance space, these forces are predominantly shifted to the male coupler body, thereby reducing the likelihood that the male coupler head will shear from the remainder of the male coupler.

Abstract: Drive shaft for interchangeable reaming heads intended for surgical use, in particular a reaming head used prior to the positioning of an intramedullary nail in the femur or in a long bone. The shaft has a rod (20) made from composite material, e.g. carbon and/or glass fiber reinforced polymer, and a connection element (35) for the coupling of an interchangeable reaming head. One portion (32) of said connection element (35) is inserted into a cavity in the first end (21) of said rod (20). The inventive shaft has a constant diameter, a smooth external surface and a low cost such that it can be disposed of after use.

Abstract: An assembly includes a quick-release head, a tail piece and a flexible metal rod. The tail piece includes a shaft and a male coupler formed of a head, body, and flute. At least a portion of the male coupler head has a reduced outer dimension relative to an outer dimension of the body. When the male coupler is mounted in a second quick-release head or drill, a clearance space is provided between the reduced outer dimension portion and the second quick-release head or drill. During use, the assembly may undergo bending which results in significant forces applied in particular to the male coupler head. By providing the clearance space, these forces are predominantly shifted to the male coupler body, thereby reducing the likelihood that the male coupler head will shear from the remainder of the male coupler.

Abstract: A machine tool includes a driver, a tool holder, and a locking device in the form of, for example, an alignment collar. In use, the machine tool carries a tool, such as a surface refinishing bit, which may be lowered into a workpiece bore, such as a cylinder head valve seat, and subsequently rotated by a machine spindle for resurfacing the bore. The machine tool receives a pilot shaft placed in a reference bore associated with the workpiece bore. The pilot shaft functions to ensure general alignment of the machine tool cutting axis and the refinishing surface.

Abstract: A case is mounted to the outer portion of the bottom portion of the shank through a bearing and an absorption rod is situated in an axial hole provided in the axial direction on the bottom of the shank such that it is slidable in the axial direction. An absorption spring for urging the absorption rod in the axial direction is installed between the absorption rod and the shank and a tiltable case is situated on the bottom within the case such that it is capable of tilting with respect to the axial line. A holder is situated rotatably through a bearing within the tiltable case. A slidable holder provided with a chuck portion for a tool at a leading end thereof is situated slidably in the axial direction and the bottom end portion of the absorption rod and the top end portion of the holder are connected to each other through a universal joint.

Abstract: A device gaging, tapping and/or re-chasing threaded devices which automatically accommodates and corrects for both lateral offset and angular offset between the longitudinal axis of the threaded member of the device and the threaded member being tested.

Abstract: A flexible, extendable extension assembly used to create extended length holes and holes through inaccessible areas in walls and framing. The extension assembly including a flexible, solid core rod having first and second ends; and a holding means secured to the first end of the rod for releasably holding a tool bit for rotation with the rod.

Abstract: Disclosed is an alignment tool. A body of the alignment tool fits into a turret block, while a head holds a machine-tool. During the alignment process, the head and body are allowed to move relative to one another in two dimensions perpendicular to an axis of rotation of a spindle. To align the alignment tool, a workpiece is inserted into the spindle. As the workpiece spins, a machine-tool cuts a taper in it. An “empty” alignment tool is brought to bear against the tapered workpiece. The axis of the head of the empty alignment tool, and thus the axis of any machine-tool held by the head, is aligned with the axis of the tapered workpiece and, thus, with the axis of the spindle. Once the machine-tool is aligned with the spindle, the head and body are tightly fastened together to preserve the alignment.

Abstract: A flexible, extendable extension assembly used to create extended length holes and holes through inaccessible areas in walls and framing. The extension assembly including a flexible rod having first and second ends; and a holding means secured to the first end of the rod for releasably holding a tool bit for rotation with the rod.

Abstract: A device gaging, tapping and/or re-chasing threaded devices which automatically accommodates and corrects for both lateral offset and angular offset between the longitudinal axis of the threaded member of the device and the threaded member being tested.

Abstract: An apparatus for operating multiple tool bits, all being independently powered through flexible shafts by a single motor, wherein each flexible shaft is connected to a dedicated docking station, and the single drive motor is operatively connected to a given docking station only when the particular tool bit dedicated to that particular docking station is desired to be operational. The motor is translated along a track corresponding to the pathway defined by the docking stations.

Abstract: A pneumatically driven deburring device having a housing and a pneumatic motor mounted therein which is adapted to receive and drive a deburring tool. A pivot bearing is mounted within the housing adjacent the pneumatic motor. A motor support is held within the pivot bearing and extends therefrom where the motor support connects to the pneumatic motor. An air inlet is disposed adjacent the pivot bearing and is communicatively connected thereto. Air for driving the pneumatic motor is directed through the air inlet, and through a hollow portion of the motor support to where air is directed into the pneumatic motor. Because the motor support is supported or contained within the pivot bearing, it follows that the motor support articulates with the pivot bearing and hence the pneumatic motor moves with the articulating motor support.

Abstract: A robotic deburring tool having a housing. Mounted within the housing is a pneumatic motor that includes a backwall and a drive shaft. Secured to the terminal end of the drive shaft is a deburring tool. A pivot-bearing is mounted in the housing adjacent the backwall. A connector extends from the backwall of the pneumatic motor and connects to the pivot bearing, thereby permitting the pneumatic motor to freely articulate radially in any direction while preventing free rotation about the bearing's longitudinal axis. A compliance device extends around the pneumatic motor at a location between the backwall and the deburring tool secured to the drive shaft. The compliance device restricts the movement of the pneumatic motor while applying a compliance force to the pneumatic motor as the pneumatic motor moves with the pivot bearing.

Abstract: A toolhead assembly for a CNC machine displaceable along orthogonal x, y and z-axes generally consisting of a support assembly, a tool carrier supported on the support assembly having a rotatable tool axis and being displaceable relative to the support assembly between a first position wherein the tool axis is aligned with the z-axis and a second position wherein the tool axis is misaligned with the z-axis, structure for yieldably biasing the tool carrier assembly into the first position and structure responsive to a displacement of the tool carrier assembly to the second position for breaking an electrical grounding circuit of a controller operatively connected to the machine.

Abstract: A flexible drive shaft extension for hand tools comprises serially nested, socket-ended Shaft components of polygonal cross-section which have freedom of universal motion from axial alignment limited to about five degrees of arc and which are forcibly retained in coupled connection within a sleeve by spring biasing.

Abstract: A drill tool comprises a drive shaft (2) that is arranged to allow rotational movement to be transmitted from a drill to a drill bit holder (10) even when the opposite ends of the drive shaft are not axially aligned. The end of the drive shaft housing the drill bit holder (10) can be inserted into a guide member (14) that includes a planar element (18, 42) that is arranged to ensure that the drill bit is maintained at substantially 90° to the surface of a work piece being drilled even if the drill itself is not so aligned.

Abstract: In a tapping unit according to the invention, the tap is held in a tap-carrier which is screwed into a pattern retained and fixed against rotation in a casing. The tap, the tap-carrier and the pattern form a subassembly mobile with limited amplitude in axial translation and radial displacement inside the casing, so that the tap can follow unwanted movements of the part being tapped.

Abstract: A flexible socket extension includes two connectors disposed in two ends of a flexible housing, and a number of torque transmitting elements received in the flexible housing and coupled between the connectors. One of the torque transmitting elements includes a neck and a tongue which has a width greater than that of the neck. The other torque transmitting element includes a lateral groove for receiving the tongue, and having two juts extended into the lateral groove, for engaging with the tongue and for rotatably retaining the torque transmitting elements together.

Abstract: A method and apparatus for testing plumbing installations including a tool for making an opening through a test cap or other blockage in a fluid-carrying line of a plumbing system. The tool and cap make the testing method possible. During the rough-in plumbing phase of construction, a test cap welded in the drain pipe seals the drain line from the sewer line at the location of the clean-out. Thereafter, the rough-in plumbing system is tested by pressurizing the system through the clean-out on the building side of the cap. Following successful completion of this test, the top-out plumbing is completed, leaving the test cap welded in place. After the roof vents are in, the top-out test of the plumbing system is made, also through the clean-out. After final test and inspection, a special tool constructed in accordance with the present invention is inserted down the clean-out to penetrate and ream-out the test cap.

Abstract: Holes can be cut squarely through obstructions hidden within a hollow wall by apparatus that may include a flexible guide tube having a work-engaging head at one end; a collared lead screw or other arrangement for bringing the work-engaging head into perpendicular engagement with an obstruction; and a cutting tool for cutting the hole. In a some versions of the invention, two work engaging heads are coaxially attached to the end of the guide tube, inserted into the wall through an access hole, and used to sequentially cut holes through two obstructions. An advantage of this arrangement is that the second, smaller, hole has a large enough diameter to be used for feeding most sorts of flexible lines through the wall. In addition, a panel protecting apparatus is provided so that extensive work can be done within the wall without damaging the margins of the access hole.

Abstract: The present invention provides for a readily exchangeable flex tool for machining a workpiece. The flex tool includes a driver and an tool carrying body. The driver is coupled to the tool carrying body in a manner which allows the tool carrying body to have at least two degrees of freedom with respect to the driver. The tool carrying body includes an elongate pilot shaft, the elongate pilot shaft and tool carrying body having a longitudinal axis. The at least two rotational degrees of freedom allowing the longitudinal axis of the tool carrying body and elongate pilot shaft to be aligned with a longitudinal axis of a reference bore contained in the workpiece and slidably inserted therein.

Abstract: Within the hermetically sealed interior of a housing 9, a driving bevel gear 15 is fixedly secured to an input shaft 12 coupled via a rotation transmission cable 5 to an output shaft of a drive unit. A spindle 19 rotates jointly and coaxially with the driving bevel gear 15, which meshes with a driven bevel gear 17 coupled in such a manner as to allow a relative displacement in the axial direction. The spindle 19 has an externally threaded portion 19A screwed in an internally threaded portion 20A of a master metal 20. The spindle 19 has one end protruding from the housing 9 to the exterior, the one end being provided with a spindle chuck 21 for retaining a tap T.

Abstract: A horizontal cutting type-tapping machine has a vertically extending drive shaft and a pair of detachably engaged surface gears. The surface gears have a curved upper surface gear, fixedly connected to the drive shaft, and a lower surface gear. A gearbox is connected to the lower surface gear and converts a horizontal rotating force of the drive shaft to a vertical rotating force. An externally threaded shaft is horizontally mounted to a vertically rotating gear of the gearbox. An internally threaded sleeve is disposed in the gear housing of the gear box and engages the externally threaded shaft so as to be horizontally moved by rotation. A saw part is fixed to a front end of the internally threaded sleeve. An internal tube, mounted around the drive shaft, has a thread at its upper portion and a lower portion with a diameter smaller than that of the upper portion. A vertically moving sleeve is slidably mounted around the lower portion of the drive shaft.

Abstract: The invention provides a flexible guide tube with prongs or other work-engaging means at one end. These prongs may be stabbed into an obstruction in a hollow wall to set the position of a throughhole and to hold the tubular guide in a fixed position against the torsional, or other, forces of a drill or other cutting tool used to cut the hole. The drill may be rotated by means of a flexible shaft running within the guide tube. After a throughhole is cut in the obstruction, a line-fishing member may be inserted through the guide tube and the obstruction and into a space on the distal side of the obstruction. The line-fishing apparatus may comprise an end portion having a collapsed state in which it can pass through the guide tube and an expanded state in which it provides a visible target that can be readily engaged by tools operated by a worker on the distal side of the obstruction who is prohibited from getting any closer than a few yards from the target.

Abstract: A flexible deburring tool for removing burrs from a metal component made of unitary construction having a handle and a tool head with a flexible shaft extending between them that allows the tool head to be positioned in hard to reach or tight fitting situations. The tool head is provided with a recess to receive a tool bit such as a deburring bit. The shaft is narrower than the handle and allows a range of flexation greater than 90 degrees.

Abstract: A plumbing tool for providing a passageway through a blockage, such as a test cap or other blockage, in a fluid-carrying line. During the rough-in plumbing phase of construction, the drain pipe leading from the plumbing system in a building to the city sewer main in the street is positively sealed off by a test cap welded in the pipe at the location of the clean-out. Pressurizing the rough-in plumbing to test the same can then proceed knowing that if any leaks occur, they are in the branch plumbing on the building side of the test cap and not at or in the test cap. Following successful completion of the initial test, the top-out plumbing is completed, leaving the test cap welded in the clean-out or drain pipe. After the roof vents are in, the top-out test of the plumbing system is made, again knowing that if the system shows any leaks, they are the result of a failure in the plumbing work and not a failure of the test cap.

Abstract: A bone milling tool for precise preparation of bones includes a milling head connected to a driveshaft. The driveshaft simultaneously serves as a guide element which is guided in a bone. The bone milling tool further includes a toothing which is arranged on the milling head facing the driveshaft.

Abstract: An apparatus for reaming a bone canal, such as the medullary canal of a femur, has a flexible shaft (12, 92) with a proximal end (16) for engaging a rotary transmission source. A first reamer (14, 61) is coupled to the distal end of the flexible shaft for rotation therewith to prepare the distal portion of the canal. A second reamer (22, 93) coupled with the proximal portion of the shaft to form the proximal end of the lateral portion of the canal and/or the medial calcar region of the canal. The apparatus further comprises a metaphyseal template (70, 80) having the shape of the prosthesis for guiding the reaming apparatus in forming the calcar region of the canal.

Abstract: A method and machine for repairing overhead cam engine cylinder heads and the like. The method includes the steps of removing the caps from the bases of the bearing towers or housings, removing material from the legs of the caps to reduce their height, replacing the caps on the bases, and boring the resulting bearings to produce bearings of the proper diameter. The machine includes a device for machining a bearing cap and a device for boring the bearings. The device for boring the bearings has a boring bar that is supported only at opposite ends of the cylinder head. The bar does not sag or chatter because it is made of an extremely hard and dense material such as a dense tungsten alloy or a ceramic-coated metal.

Abstract: A curved machining jig for machining a curved workpiece having an arcuate shaped centerline, the curved machining jig comprising a table having a rotatably mounted column extending perpendicular from the table, the column rotating on a first axis perpendicular to the table, an arm attached to and extending from the column, a drive portion on the arm, a tool attachment and a workpiece attachment supported above the table, the curved workpiece removably retained by the workpiece attachment, a machining tool on the tool attachment, a means for moving the drive arm causing the arm to rotate about the column engaging the workpiece and the machining tool to perform a curved machining operation on the workpiece.

Abstract: A threaded hole may be formed in a lid of an underground petrol tank without emptying the tank or removing the lid, using a tool (FIG. 3) having a taper tap section (61), an intermediate tap section (62) and a final tap section (63). At the leading end of the tool, there is a reamer section (60) and supported on the free end of the tool is a centerless hole cutter (50). A resilient mounting transmits drive from the main part of the tool to the cutter (50), but allows the cutter to float. A sleeve (23) surrounds the tool, so that a column of inert gas may be caused to lie in the cutting region. A magnet (57) mounted within the cutter (50) catches and holds a released disk of the cover. Also described is a rig (FIG. 1), for operating the tool (FIG. 3), and a method (FIG. 5) of securing a collar threaded into a hole formed by the tool.

Abstract: A surgical reamer is used in conjunction with a femoral neck cutting guide to enlarge the intramedullary canal of a resected host femur to expose hard cortical bone. The reamer has a longitudinally fluted cutting head that is flexible and able to bend relative to its longitudinal axis whereby to conform to axial or curved cortical bone surfaces to be engaged by like mating surfaces of a hip prosthesis to be implanted therein. In this regard, the cutting head includes a helical band spiralling between the ends of the cutting head.

Abstract: A drilling tool for drilling a curved hole. The tool includes a curved guide tube for positioning the tube in drilling position against a wall and a flexible shaft extending through the guide tube having a drill bit on the end thereof adjacent the outlet end of the tube and a shank on the opposite end engaged in a drill tool chuck. Operation of the drill tool rotates the drill bit and the tube guides and directs the bit to drill a curved or angled hole. The drill bit can be a spade bit, a spiral bit or a ball mill.

Abstract: The flexible shaft cables of a plurality of power tools pass through recesses of a switch assembly having a plurality of spring-loaded switching elements respectively extending into the recesses. Lifting the cable of a selected tool out of its recess, actuates the associated switching element to automatically connect the selected tool for actuation by a common foot pedal.