Abstract: A method and apparatus for automated loading and unloading of a cylinder in an engraver. The method and apparatus permit the engraver to accommodate cylinders of differing geometries, including a range of lengths, diameters and mounting configurations. The engraver includes a headstock and a tailstock which cooperate to rotatably support a cylinder at an engraving station in the engraver. The engraver includes a cylinder handling system having at least one cylinder supporting the cylinder between the headstock and the tailstock during the loading and unloading of the cylinder. The cylinder handling system includes a driver for driving the cylinder support towards and away from the engraving station until the headstock and the tailstock engage and rotatably support the cylinder. Once the cylinder is rotatably supported between the headstock and the tailstock, then the cylinder support is retracted.

Abstract: A method and a device for preventing a drilling chip from winding around a drill bit and for removing the drilling chip deposited in flutes of the drill bit comprising a drill bit acting as a driving member and a driven gear having at least one tooth engageable with flutes of the drill bit. As the drill bit is turned to drill a hole, the driven gear is actuated to turn such that the tooth of the driven gear engages the flute of the drill bit so as to scrape off any drilling chip deposited in the flute of the drill bit and to prevent the drilling chip from winding around the drill bit in action. The driven gear is rotatably and movably fastened to a support rod which is in turn fastened to a drill press.

Abstract: A dust guard fits onto the stationary housing of a portable electric drill with a resilient annular terminal portion. An elongate, axially compressible, elastic cylindrical body portion extends from the terminal portion, surrounding the drill bit and forming a chamber to receive debris and dust from the drilling process. The free end of the body portion is provided with a resilient, non-marring annular end piece for engaging the surface of the workpiece being drilled. As the drill bit penetrates the workpiece, the end piece is forced against the body portion, causing it to elastically shorten. The terminal portion 5 has external screw threads 9, and adapters with mating screw threads are provided. These adapters 6, 12, 13, 14 and 15 have progressively greater inside diameters for engaging drill housings having greater diameters than those that would fit the terminal portion 5.

Abstract: A device for securely clamping a drill motor to a drill plate in order to drill precisely positioned holes in a workpiece includes an annular mandrel and annular collet concentrically disposed about the cutting element. A first end of the collet includes a plurality of longitudinally extending fingers while the mandrel has a tapered end portion having a larger external diameter than the center cylindrical portion of the mandrel. A pneumatically-actuated piston is also coaxially disposed about the cutting element to extend and retract the mandrel and the collet. Once extended, the longitudinally extending fingers of the collet overlie the center cylindrical portion of the mandrel. Thus, the clamping device may be inserted through an aperture defined in a drill plate. Following its retraction, the longitudinally extending fingers of the collet overlie the tapered end of the mandrel and are correspondingly expanded.

Abstract: A hay baler or bale compressor capable of producing aerated bales of hay which can be effectively stored and shipped. Specifically, the baler includes a packer mechanism which operates to retrieve and compress individual capsules of hay and a plunger or piston that compresses the individual precompressed capsules into a large bale while simultaneously cutting and removing portions of the capsules. The plunger includes at least one tubular cutter which extends through the plunger and projects a desired distance from the face of the plunger. In operation, each time the plunger compresses the plunger load, plugs of hay are cut from capsules making up the load and passed through the tubular cutter to the throat of the baler. If a plurality of holes are formed, proper spacing of the holes allows the hay to breathe and, thus, permits shipment of large and small bales of hay without fear of premature spoiling or fire.

Abstract: A method and apparatus for arresting structural termite infestation while eliminating the risk of poison exposure to occupants of the structure includes a power tool for drilling holes in wood members of a structure, implanting pellets of termite poison within the drilled holes, and sealing the holes. The tool includes a tubular body portion joined to a storage portion that stores a plurality of packages of pellets of termite poison. A platen assembly is secured to the storage portion and adapted to impinge on a wood member of a structure. The tubular body encloses a reversible drive motor connected through a gear train to rotate and translate the drill assembly reciprocally in a guideway. Cellulose balls impregnated with poison or insecticide or flagellacidal agents are grouped in loads, each load packaged and disposed in the tool parallel to the guideway, with a plug cork is disposed at the proximal end of each load.

Abstract: A self-feed drill assembly (10) for forming an opening within a work piece (20). The drill assembly (10) includes a power driven drill (12) having a rotating cutting element (18) and a mounting fixture (14) for maintaining the relative position of the power driven drill with respect to the work piece (20). The mounting fixture (14) includes a nose piece housing (22), a foot mount housing (24) and a means for releasably joining the nose piece housing and the foot mount housing in an axially coupled position. The nose piece housing (22) defines a first chamber (26) adapted to receive a leading portion of the power driven drill (12) and the foot mount housing (24) defines a second chamber (28) adapted to receive the nose piece housing and in communication with the first chamber such that at least the rotatable cutting element (18) extends through the first chamber, the second chamber and the foot mount housing to contact the work piece (20).

Abstract: A cooling and dust collecting apparatus for drilling machine tool is disclosed, which comprises a telescopically expandable/shrinkable cylinder having a base cylinder and a movable cylinder, the base cylinder being disposed on the drilling machine in such a manner that the base cylinder surrounds the drilling machine, the movable cylinder being slidably connected to the base cylinder, the movable cylinder surrounding a cutting tool, a blowing pipe connected to an outlet opening portion defined on the movable cylinder, the blowing pipe being adapted for blowing the cutter with cold air, and a sucking pipe connected to an inlet opening portion defined on the movable cylinder, the sucking pipe being adapted for sucking cutting chips and poisonous gas, wherein the movable cylinder has a joint portion, a forward end portion, and an intermediate portion, the joint portion being connected to the base cylinder, the forward end portion surrounding the drill of the drilling machine, the intermediate portion being dispo

Abstract: A chip removal method and apparatus for a sign engraving machine. The method involves engraving a sign blank in such a manner that chips fall from a cutting region on the sign blank into an enclosure, and swirling the chips in the enclosure so that the chips exhaust through an opening in the periphery of the enclosure and eventually pass through a chute into a receptacle. The apparatus is a guide member located parallel to an outer envelope of the volume that can be occupied by a rotating cutting head of the engraver. The guide member has a surface for contacting the sign blank. The contact surface has an access opening at its center to allow chips to enter the guide member from a cutting region on the sign blank. The guide member tapers away from the cutting region and has an exhaust opening and chute for exhausting the chips. The guide member is used with a rotating cutting head that propels chips circumferentially and allows them to be exhausted through the chute.

Abstract: A combination pipe piercing fitting and valve including a housing formed of a weldable plastic and having a valve casing communicating with a branch nipple. In the valve casing a valve stem and a boring tool are disposed for axial movement so as first to pierce a pipe welded to the housing and to then selectively open or close the branch nipple from the pipe. A sleeve for guiding the boring tool is axially and rotationally secured in the valve casing and extends at least past the area where the branch nipple enters the valve casing. This guide sleeve has a valve seat at its bottom end and an opening adjacent the branch nipple. This combination fitting and valve assures high operating reliability without leakage both during piercing of the pipe and during operation as a valve.

Abstract: In a cutting oil supplying device supplying cutting oil to a tap which taps a work installed on a worktable, the device comprises a cup being filled with the cutting oil provided beneath the worktable and located at a tapping position, and a wiping means provided in the cup such that when the tap goes into and out of the cup, the wiping means wipes off excess oil and cutting dust and applies the least amount of the cutting oil necessary for cooling the tap and reducing friction between the tap and the work to the tap, where the wiping means is a flexible porous member such as a sponge for example.

Abstract: A cooling and dust collecting apparatus for machine tool for cooling a cutter mounted on a rotating spindle and for sucking and exhausting cutting chips to the outside of the apparatus is disclosed, which comprises a cooling and dust collecting housing surrounding the rotating spindle and the cutter, a plurality of cold air passages, defined inside the housing, for sending cold air of a pressurized cold air supply portion disposed as an external device to a first cold air delivery hole and a plurality of second cold air delivery holes, a cutting chip exhaust passage, defined in the housing, for connecting a cutting chip sucking device disposed as an external device to an inner space of the housing, and an elastic hood downwardly extending from the lower end of the housing, the elastic hood defining slits at the lower end thereof, wherein the first cold air delivery holes are adapted to blow pressurized cold air toward a shaft portion of the cutter, and wherein the second cold air delivery holes are adapted to

Abstract: A pressure foot (7) of a printed circuit board drilling apparatus is supported on a spindle (2) of the printed circuit board drilling apparatus slidably in the axial direction, and includes a pressing face (13) which presses a printed circuit board (5) at the time of drilling operation, a discharge port (11) formed in a side wall (8) so as to discharge chips produced by drilling operation, the discharge port (11) being connected to a suction device, and a compressed air supply conduit (20A) formed in a side wall so as to eject the compressed air toward a drill bit (4) of the printed circuit board drilling apparatus. A cooling fluid supply device (21) is connected to the compressed air supply conduit (20A). In place of the compressed air supply conduit (20A), a fluid supply conduit (14) for ejecting a cooling fluid toward the drill bit (4) of the printed circuit board drilling apparatus may be formed.

Abstract: A valve for installation on a flow line while the flow line is under pressure. The valve includes a two-part valve body and a valve cartridge. Each body portion has a semi-cylindrical channel sized to mate with the flow line. The body portions are secured together with a portion of the flow line enclosed and sealed in the channels of the body portions. A throughbore extends through the two body portions and fully intersects the channels of the two body portions. One end of the throughbore is adapted for attachment of a cutting tool, which is used to cut out the portion of the flow line disposed in the throughbore. After the flow line is cut, the valve cartridge is directed into operating position. A valve stem nut, a valve cap, a valve plug, gaskets, seals and connectors are provided to close and seal both ends of the throughbore.

Abstract: A valve adapted for insertion in a pressurized fluid flow line for blocking and sealing the flow of fluid through the line without disconnecting the line and to maintain the pressure in the upstream end of the line. The valve includes two body portions which may be clamped on the fluid flow line to form a valve body in which is adjustably mounted a shaft carrying an annular hole cutter and a tubular seal. The shaft is rotatable for driving the annular hole cutter through the line and to position the tubular seal in the hole cut through the line to block and seal flow through the downstream portion of the line.

Abstract: An NC machine surrounded by a housing provided with a door on a front surface of the housing so that a workpiece may be loaded into the housing and unloaded therefrom when the door is in an open condition. An articulated robot, for replacing the workpiece, is provided so as to be laterally movable along an opening and closing direction of the door. Such a laterally movable function of the articulated robot permits a hand of the robot to grip a desired one of the workpieces arranged in lateral and longitudinal directions on a stock table. The articulated robot is provided with a sensor for detecting a dog provided on the door and an air cylinder for connecting the robot to the door when the dog is detected by the sensor. Accordingly, after the robot is connected to the door by the air cylinder, the door can be opened and closed by the lateral movement of the articulated robot.

Abstract: An end effector adapted for attachment to and accurate positioning by a robot is provided for positioning a channel-shaped workpiece at a desired position and drilling an accurately located positioning hole in the workpiece. The end effector includes a conventional speeder unit with a Morris taper that can be grasped by the robot and rotated for transfer of torque to the speeder unit. A top plate is attached to the speeder unit and has a central opening to receive a drill collet extending downward from said speeder unit for drilling the holes in the workpiece. A base plate is connected to the top plate by guide rods which are pressed into bores in the base plate and extend through linear bearings in the top plate for self-parallel movement relative to the top plate. A pair of nuts mounted on the top plate is threadedly engaged with a pair of lead screws connected to the base plate so that vertical movement of the base plate will push the lead screws through the nuts and rotate the lead screws.

Abstract: The invention relates to a multi-spindle boring machine with machine table and suction arrangement in which the spindles are held on a carrier, which can be rotated by means of a vertical drive shaft, and in which an extractor fan can be connected to a suction duct, which ends in the area of the tool set in the working position and received by the spindle. With a central suction unit and individual exchangeable tool coverings, which can be connected with a covering distributor with connecting ducts to the central suction pipe, the invention provides for optimum suction, which can be adjusted to the different tools used.

Abstract: A device for preventing contamination of a clean room during a drilling or cutting operation. A box-like chamber is provided for containing a power driven tool such as a drill. One wall of the chamber includes an opening for access to the workpiece (e.g. a wall to be cut or drilled). Another wall includes an access port with a rubber glove for operating the power tool. A pigtail electrical outlet within the chamber provides electrical power to the tool. A similar chamber may be used on an opposite side of the wall being drilled in the event it must be kept clean also. Both chambers include a port for attachment to a vacuum source such as a conventional vacuum cleaner and a port for entry of air to divert debris away from the workpiece and into the vacuum cleaner. In another embodiment, a small enclosure is clamped to the body of a drill or similar tool. The enclosure includes a vacuum port for removal of the debris.

Abstract: An improved machining apparatus for machining a workpiece. The machining apparatus includes a base assembly having a base support member and a table support frame non-movably attached to the base support member. A pair of cross members span the upper surface of the table. The table support frame has a longitudinal axis transverse to the cross members and includes a raceway for allowing lateral displacement of the table relative to the base assembly. At least one spindle is mounted on the cross members and can be displaced along the longitudinal axis of the cross members. Flexible retractable covers are mounted on spring-loaded rollers attached to the ends of the table support frame. The machining apparatus further includes a conveyor positioned proximate the base assembly at the lower edge of the table for removing cuttings and debris resulting from the machining of the workpiece.

Abstract: A dustless hole saw includes a compressible dust catcher surrounding a saw blade removably affixed to a rotating circular frame. The generally cylindrical compressible boot has an end plate at the end furthest from the saw blade. One end of a generally cylindrical sleeve is affixed to the end plate and the other is attachable to a drill motor. The boot encloses the chuck of the drill motor and has an access opening in its sidewall to permit adjustment of the chuck. The end plate may be at least partially transparent to permit the operator to align the pilot drill of the saw. As the hole saw cuts into the work surface, the boot is pressed against the surface outside the perimeter of the cut catching the dust and debris created by the cutting operation.

Abstract: Drilling device with force transmission from a hollow-cylindrical drive member to a tubular shank equipped with a drill bit wherein the drive member (3) is rotatably mounted in a housing (41), with the housing (41) being provided with a port (42) for a suction and/or flushing device. The interior of the drive member (3) is connected with the port (42) by way of holes in its wall and the flow path is provided with means (11, 27, 28, 29, 40, 453, 495, 496) for preventing clogging of the flow path.

Abstract: A drilling device for producing drilled holes with an undercut has a drill bit having a drilling head, a depth stop, an enlargement provided between the the drilling head and the depth stop and acting as a swivel bearing, a suction bell rotatably mounted on the depth stop, a bearing washer, and a resilient, ring-shaped cushioning element provided on the depth stop. The cushioning element abuts against the bearing washer and is connected to the suction bell. The depth stop of the drill shank has a concavely curved end face and the bearing washer has a convexly curved sliding face which rests on the concavely curved end face of the depth stop.

Abstract: An apparatus for suctioning chips cut by a drill, mist lubrication of the drill, and cooling the coil of an electromagnetic riveter includes a movable shuttle body having a drill/suction cavity open at the top to receive a drill dit, and having a tapered opening at the bottom through which the drill descends to drill a hole in a workpiece clamped by a pressure foot attached to a carrier in which the shuttle body slides. A port opening in the side of the cavity is connected to a vacuum hose through which drill chips cut by the drill bit are suctioned away from the workpiece as they are made. A second port opening in the side of the cavity aligns with a nozzle through which mist lubrication is blown on the drill bit before it starts drilling, and through which air is blown into the cavity to swirl the chips as they are being cut by the drill to facilitate their removal through the vacuum port. The coil of an electromagnetic riveter is cooled by conduction to a transducer with which the coil is in contact.

Abstract: An apparatus and method for the hydraulic removal and collection of cuttings from machine tool systems. The present invention provides a cutting removal and collection system comprising a housing at least partially enclosing a machine tool and a plurality of trays at the bottom of the housing for collecting the cuttings as they fall from the machine tool. Jets of fluid, such as a liquid coolant, are used to direct the cuttings along the trays and into a rotating drum. The drum has a hollow annular structure with fins disposed in an axial direction along its interior. The drum also has a perforated surface for allowing drainage of the fluid off of said cuttings and back into a tank positioned below the rotating drum. As the drum rotates, the fins carry the cuttings in the circumferential direction of rotation. Once the cuttings are carried to a certain height, gravity causes the cuttings to fall onto a drop tray positioned along a horizontal chord of the rotating drum.

Abstract: The present invention relates to a printed circuit board presser device in a drilling machine. The board presser device is arranged such that it includes an axially movable upper-plate presser device which is provided on the outer side of a contact surface of the board presser device with a printed circuit board so that a top end surface of the upper-plate presser device extends to the side of a table beyond the contact surface; and an urging device for pushing the upper-plate presser device against the table by a force larger than an attraction force generated from the board presser device. With such construction, an upper plate is suppressed from floating during drilling the printed circuit board, and a distance of useless transfer movement of a drill decreased, to thereby improve an efficiency of a drilling operation.

Abstract: Two lifting units (1, 2) have lifting grabs (3) for lifting individual concrete slabs (29) off a prestressing bed on which they have been cast and then stacking them on a pair of support beams (6) to form a pile (28). Once the pile (28) has been formed, the lifting units (1, 2) use lifting hooks (16) contained within an upper frame (14, 15) to lock into the beams (6). A jacking mechanism (13) then raises the upper frames (14, 15) relative to lower frames (11, 12) to lift up the entire pile of slabs (28). The lifting units (1, 2) are mounted on rails (9) which run along the sides of the prestressing bed and lead off to a stockyard where the pile of slabs (28) is taken by the lifting units (1, 2) for storage. During transfer of the individual slabs (29) to the pile (28), drilling units (4) are swung under each slab ( 29) to drill drainage holes. One of the lifting units (1) has a container (21) for dispensing and collecting the beams (6).

Abstract: A device for installing an in-line valve in a pipe through which fluids under pressure may be flowing. The device has a hollow coring bit and a boring and support housing. The hollow coring bit is housed and guided by the boring and support housing. The hollow coring bit cuts through the sidewalls of the pipe and forms an in-line valve.

Abstract: Guide means are provided enabling a gun drill to be rotatably mounted in a supported bearing structure for operation with reduced bearing failure. The modified guide assembly provides a more effective seal means by reducing entry of chips and lubricant into the rotating bearing when machining a workpiece.

Abstract: A drilling tool comprises a holder unit adapted to be detachably mounted to a hand-held drive unit, and a hole saw unit detachably mounted to the holder unit, the hole saw unit including, as a unit, a cylindrical cutter and a center pin, the holder unit including, as a unit, a spring and a slider disposed to allow reciprocating motion of the center pin, whereby the drilling tool is able to constantly form an appropriate hole in a workpiece such as a thin iron plate, a thick iron plate, or a pipe having a round surface, and expandable components of the drilling tool are formed as a unit to allow for ready replacement.

Abstract: Disclosed are safety debris collectors for collecting dust and debris, such as concrete particles and dust, rock chips, steel particles, radioactive particles, insulation and other particles and dust when drilling, chipping and using stud guns, drills, piston drive devices and other operating tools used in the construction industry which create working dust or debris and the like. The safety debris catcher does not rotate or move with the operating portion of the tool, it is easily and readily connected to and detached from an operating tool or device, it can be used in confined spaces, such as spaces between beams, braces, and ceilings at different elevations, and it can be used at any angle and effectively collect debris, dust and other particles. A rotating inner disk within the base of the debris catcher forms a rotating inner surface of a chip chamber, urging debris away form the tool into a debris receiving chamber.

Abstract: A folding box gluing machine to be used for the production of packages is provided with a lateral wall situated on the operator's side of the machine which consists of a plate making up the machine frame. The plate has several apertures providing access to, and inspection of, the inner machine area. The full or closed areas of the plate are covered up by hollow panels in which the machine components can be lodged. The apertures are closed by transparent panels which are removable and are provided with safety detectors preventing the machine operation as long as they are not closed. The height of the panels is sufficiently high so that the wall will be able to ensure a noise absorbing or blocking effect.

Abstract: An electric hammer drill including a vacuum dust collecting device for collecting dust from an area of an article being drilled by a drill bit wherein a hose extending from a body of the hammer drill is directly connected to an end of a movable first pipe which is slidably received in a stationary second pipe. A fan for transporting the dust by vacuum is fixed on a shaft extending across a dust collecting chamber in the body. The shaft is coaxial with, and releasably coupled with, an armature shaft of a motor. With this releasable coupling, the armature shaft is relatively short and unlikely to bend or flex, so that vibration produced during a drilling operation is small. During the drilling operation, the first pipe slides back and forth along the second pipe as a suction hood moves in a direction opposite to the direction of movement of the drill bit.

Abstract: This invention relates to a device for driving a drilling or percussion tool having a spindle that rotates with respect to a housing. One end of the spindle is adapted to fasten to a tool piece and the other end is connected to an oscillating percussion body movable in the housing by means of a guideway. A drive shaft rotates the tool spindle into rotation or actuates the percussion body via a transmission that is provided with means for converting the rotary motion of the drive shaft into an oscillatory motion of a drive member. The drive member is connected to the percussion body through an elastic member having a non-linear sping characteristic.

Abstract: A T-branch formation device using two identical side members to form a snap-on saddle around a resilient plastic pipe and a screw-in coupling cutter which cuts through resilient piping, retains the cut piece, and simultaneously provides a threaded surface for attaching a branch tubing which forms a leak-proof connection.

Abstract: A pressure foot for a microwave drill detection system has a cavity in the base, a cover closing the opening into the cavity, with the cover and the base being designed to inhibit microwave radiation leakage, whereby a microwave beam directed toward a drill bit in the cavity is substantially confined within the cavity.

Abstract: A drilling jig for holding cutting chips and other debris has two separable sections. A cylindrical body has one closed end and one open end. A circular cap is adapted to fit in or over the open end of the cylindrical body. Aligned axial holes are provided though the closed end of the cylindrical body and through the cap. An adhesive layer temporarily adheres the jig to a workpiece.

Abstract: A drill chips removing device, comprising a sleeve or a ring formed with a through hole at its central portion for axially passing said drill therethrough and provided with a fixing device for fixing the sleeve or the ring to the drill.

Abstract: An apparatus for sampling and collecting wood samples for analysis purposes which includes a boring bit surrounded by a chamber into which the boring bit draws samples and from which the samples are passed to a collection container. The boring bit is housed in a pair of slidably connected housing members which determine the depth that the boring bit enters a wood sample. Collected samples are analyzed for microbial contaminates.

Abstract: A corrugated rubber device encompassing a relatively rigid and yet expandable larger end to provide a snug fit on the drilling end of electric drills. This corrugated rubber device has recoil capabilities to accommodate the penetration of the drill bit as it progressively sinks to the depth required. This body has a transparent end to facilitate the observation of the accurate start of the drill bit, the transparent end is a holding area to accumulate dust and debris. It has a rubber tip to protect the paint or other surface being drilled.

Abstract: A method for cutting an opening in the side of a pipe carrying gas under pressure, providing a bypass through the cut, and terminating the bypass when the pipe has been repaired, and apparatus for performing steps of the method. A branching saddle is bonded to the pipe, and a fixture is mounted on the pipe at the saddle. The fixture comprises a barrel through which various tool-insertion assemblies may be inserted.The tool-insertion assemblies typically include a shaft carrying a tool on one of its ends, a driving hub affixed near its opposite end, and a sealing plug slidably mounted axially on the shaft between the tool and the driving hub. The tools enter into the fixture's bore through a tool inlet, into which the sealing plug of the insertion assembly is screwed for a pressure-tight fit. The tools are individually inserted, in succession, through the fixture's bore and through the wall of the pipe.

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: An attachment for use with medical tools to aid in isolating a medical practitioner from infectious materials found in a patient. The attachment includes both a physical barrier and means for providing a vacuum barrier around the tool to trap aerosols and the like developed by the tool during an operation. The barrier is flow connected to a vacuum source for drawing a vacuum, and gases drawn in by the source are collected by a filter. The barrier is transparent with radial spokes which form a ring-shaped passage or air channel to allow the practitioner to see the site of the operation and is disposable after each operation.

Abstract: A metal cutting tool is disclosed which includes a cylindrical cutting body (12) having an outer cylindrical surface (13) approximating the size of the hole desired and an inner wall (14) which tapers towards a base (15). The cutter body further includes a notch (17) for removal of cutting chips which has a socket disposed on the leading edge thereof. A carbide cutting tip (26) is disposed in the socket with the cutting tip being substantially pyramidically shaped, having a blunt cutting edge (35) extending above the cutter body. The metal cutting tool further includes a pilot bit (36) extending axially through the center of the cutter body, with the pilot including a short fluted (37) section which extends above the top of the cutting tip and provides a pilot hole for guiding the cutting tip during hole cutting.

Abstract: A method for cutting an opening in the side of a pipe carrying gas under pressure, providing a bypass through the cut, and terminating the bypass when the pipe has been repaired, and apparatus for performing steps of the method. A branching saddle is bonded to the pipe, and a fixture is mounted on the pipe at the saddle. The fixture comprises a barrel through which various tool-insertion assemblies may be inserted.The tool-insertion assemblies typically include a shaft carrying a tool on one of its ends, a driving hub affixed near its opposite end, and a sealing plug slidably mounted axially on the shaft between the tool and the driving hub. The tools enter into the fixture's bore through a tool inlet, into which the sealing plug of the insertion assembly is screwed for a pressure-tight fit. The tools are individually inserted, in succession, through the fixture's bore and through the wall of the pipe.

Abstract: There is provided by this invention a chip extraction apparatus for extracting chip swarf from a workpiece for collection in an external vacuum source. The chip extraction apparatus is comprised of a nosepiece assembly which houses a spring/atmospheric pressure actuated piston for providing telescopic capabilities to a drill bushing. The drill bushing contains an air inlet port for allowing air to be drawn into the interior fo the drill bushing where it will mix with chip swarf. The air application assists chip flow and contributes to efficient vacuum withdrawal of chip swarf from the drill flutes into the vaccum chamber of the nosepiece assembly. The chip swarf is eventually expelled through a vacuum port in the nosepiece assembly to the external vacuum source. Alternative drill bushing configurations are disclosed to provide consistent chip extraction rates for different material requirements and cutting tool types.

Abstract: A mortising machine comprises a base plate arranged to be located on a surface of a workpiece to be machined and having an opening, a mortising tool extending through the opening of the base plate and arranged to penetrate into the workpiece so as to remove chips and to produce a groove-like recess in the workpiece during displacement of the mortising machine, and a chip removing device provided with a suction opening in the area of the opening of the base plate. The chip removing device is also provided with a second suction opening which is spaced from the first mentioned suction opening so as to open out in the area of the groove-like recess in the workpiece.

Abstract: A pressure foot for a machine for drilling a printed circuit board is supported to be slidable in an axial direction of a rotor shaft and is connected to a vacuum suction source. The pressure foot is adapted to depress the printed circuit board during a drilling operation. A first air pathway is formed from a first supply port formed in a side wall of the pressure foot to a plurality of first blow-out ports formed in a contact surface of the pressure foot with the printed circuit board. The first supply port is connected with a pressure air source. A second air pathway extends from a second supply port formed in the side wall to a plurality of second blow-out ports opened toward an interior of the pressure foot. The second air pathway is in communication with a supply source of a pressure air. Thus, the working time and cost are reduced.

Abstract: Rotary drill apparatus is disclosed herein which is secured to a turning shaft by an adapter plate. A cylindrical core drill body downwardly depends from the plate to terminate in a plurality of cutting teeth capable of cutting an annular groove to define a core intended to be pulverized. An internal drill bit is carried on the plate in coaxial spaced relationship with respect to the circular arrangement of teeth for forcibly engaging the defined core so as to grind and powderize the core within the core drill body. A circulating coolant system carries the ground and powderized core away from the drill leaving no core chunks or residue.

Abstract: A gap for allowing the cutting chips to escape is formed between the hole saw side wall and the workpiece in order to enhance the piercing efficiency. This hole saw comprises a drill part for determining the center of piercing with respect to the workpiece, a tubular part possessing plural piercing knives at the end surrounding the circumference of the drill part, and a shank part for fixing the drill part and the rear part of the tubular part and transmitting the torque from a power unit to the both, whereby at least the piercing knife disposition positions of the tubular part possess portions sequentially different in the distance from the rotary shaft.