Abstract: A grab picks up a hollow workpiece and displaces it to a machining station where, while the workpiece is held in the grab, a tool is engaged from outside with a first surface of the workpiece to finish the first surface. Then the workpiece is reoriented by the grab and engaged by a tool with a second surface of the workpiece to finish the second surface. Another tool is fitted through a large-diameter hole of the workpiece and positioned inside the workpiece adjacent a small-diameter hole and a drive spindle is coupled through the small-diameter hole to the other tool to machine an inner surface of the workpiece adjacent the small-diameter hole. These steps are then repeated to finish another interior surface of the workpiece adjacent another small-diameter hole. Finally the workpiece is displaced from the machining station and released from the grab.

Abstract: The invention relates to a device for producing a book page index for facilitating the search for certain sections in a book. The device includes a bearing surface (1) on which a pile (3) of pages is placed. According to the invention, an index notch or thumb section (31) is to be formed on the upper region of the pile, along the front edge (7). To this end, preferably a circular, disk-shaped cutter head (17) is used, the cutter head having a cutting contour (21) on the circumference thereof. The device includes at least one displacement device (19) for moving the support and the cutter head towards or away from each other, so that the notch or thumb section to be formed can be produced on the front edge by means of the cutter head. The height of the thumb index can be set by lowering the bearing surface.

Abstract: The transmission of the rotational movement to the driving pinion of the carriage is provided by: a first gear train with a cage mounted so that it can rotate about the axial shaft and the crown wheel of which meshes with a pinion fitted onto the shaft of an electric motor carried by the body, this train carrying at least two superposed planet pinions and meshing, in the case of the upper one, with a set of teeth formed around the axial shaft and, in the case of the lower one, with an output sun gear, a second train, the sun gear of which is secured to the output sun gear of the first train and meshes with the upper planet pinion of at least one set of superposed planet pinions which are mounted so that they are free to rotate in a continuation of the body, the lower planet pinion meshing with a set of teeth which, formed on the driving pinion of the carriage, is distinct from the set of teeth that collaborates with the rack of this carriage, these two sun gears having ratios which are other than 1 and in

Abstract: An apparatus and method are provided for guiding the bit of a rotary hand tool along a corner of a work surface formed by two or more abutting surfaces, through use of a corner cutting apparatus which includes a corner cutting guide having a housing, defining an axis of the housing, and adapted for attachment of the rotary tool with the axis of the rotary tool extending through the housing along the axis of the housing. The housing also includes first and second guide walls, for engaging abutting walls at a corner of the work surface. The first and second guide walls are disposed substantially perpendicular to one another, and have respective outer surfaces which, if projected, would intersect to form a line lying in a common plane with the axis of the housing and oriented at an acute angle to the axis of the housing.

Abstract: A hole of a hole size is cut in a composite material workpiece by selecting a milling cutter having an effective cutter size less than the hole size, mounting the composite material workpiece in operable relation to the milling cutter, rotating the milling cutter about an axis of rotation, and advancing the milling cutter longitudinally into the composite material workpiece parallel to the axis of rotation at a rate of longitudinal advance, while laterally moving the milling cutter perpendicular to the axis of rotation to interpolate the hole. The rate of longitudinal advance is controlled such that the hole remains substantially a flat-bottomed hole as it is cut. The composite material workpiece is desirably affixed to a backing fixture with an adhesive material during the cutting of the hole.

Abstract: A fixation device for positioning a rotating machine tool onto a template, the template having at least one hole and at least one locating pin. The fixation device includes a housing with a housing tool end and a housing template end, a seat located on the housing tool end for coupling with the rotating machine tool, and a clamping mechanism disposed at least partially at the housing template end for coupling with at least one locating pin.

Abstract: A hand tool apparatus uses a cutting tool with a first width and a tool axis to machine a hole in an object. The hole has a second width at least as large as the first width of the cutting tool. The tool axis passes through a predetermined point on a surface of the object. The apparatus includes an actuating assembly including a housing. The housing contains an axial feed mechanism configured for moving the cutting tool in an axial direction, a spindle motor configured for rotating the cutting tool about the tool axis, and a radial offset mechanism. The radial offset mechanism is configured for moving the axial feed mechanism in a radial direction such that the tool axis is offset from a principal axis. A motor is configured for rotating said axial feed mechanism and the cutting tool about the principal axis.

Abstract: A milling method is provided for the manufacture of components composed of difficult-to-cut materials for turbomachines, aircraft and spacecraft by producing recesses with one or more side walls. An end milling cutter which cuts at the circumference and at the tip and has a tip contour which is rounded towards the circumference is used as the rotating milling tool. In addition to rotation about its axis, the milling tool performs an eccentric orbiting motion about an orbital axis spaced apart from its axis. The opposite senses of rotation lead to downcut milling, and the orbital axis performs a translational advance motion on a straight and/or curved path transversely to its longitudinal direction, with or without a swivelling motion.

Abstract: The invention refers to a tool (1), a machine tool, and a method for cutting machining of a workpiece. The tool includes a mounting portion (5) for mounting of the tool in the machine tool, a tool shaft (7), which has a first inner end (7?), connected to the mounting portion (5), a longitudinal center axis (a), which extends through the mounting portion and the tool shaft, and a main cutting edge (9) on the tool shaft. The main cutting edge (9) has an extension in an axial direction along an imaginary envelope surface, which is concentric to the center axis (a) and located radially outside an outer periphery surface of the tool shaft (7). The main cutting edge (9) is arranged to permit cutting engagement with said workpiece when the tool is rotated around the longitudinal center axis.

Abstract: A process is described for the chemical mechanical machining of semiconductor wafers. A plurality of surfaces are successively subjected to a polishing step, in which they are brought into contact with a polishing device. The polishing device contains a polishing-grain carrier with polishing grains, and the surfaces are moved relative to the polishing device. Material is removed from the surface by the polishing grains, which are fixed in the polishing-grain carrier and may become partially detached from the carrier material during the polishing operation. In each case one or more polishing steps is preceded by a conditioning step for regeneration of the polishing device. The polishing device and a conditioning surface of strong structure are brought into contact with one another and moved relative to one another, with the result that starting states of the polishing-device surface at a beginning of the individual polishing steps are comparable with one another.

Abstract: The tool comprises firstly a cutter support for being driven in rotation about a first axis of rotation that is to coincide with the axis of the orifice, and a cutter rotatably mounted on the cutter support to rotate about a second axis of rotation parallel to the first axis of rotation and spaced apart therefrom by a non-zero offset distance. A front segment of the cutter support has maximum radial extent relative to the first axis of rotation that is less than or equal to the radius of the orifice to enable the front segment to penetrate into the orifice during drilling. The tool is particularly applicable to drilling machines used in the aviation industry.

Abstract: A grab picks up a hollow workpiece and displaces it to a machining station where, while the workpiece is held in the grab, a tool is engaged from outside with a first surface of the workpiece to finish the first surface. Then the workpiece is reoriented by the grab and engaged by a tool with a second surface of the workpiece to finish the second surface. Another tool is fitted through a large-diameter hole of the workpiece and positioned inside the workpiece adjacent a small-diameter hole and a drive spindle is coupled through the small-diameter hole to the other tool to machine an inner surface of the workpiece adjacent the small-diameter hole. These steps are then repeated to finish another interior surface of the workpiece adjacent another small-diameter hole. Finally the workpiece is displaced from the machining station and released from the grab.

Abstract: A method and cutting tool for producing a hole or a recess in a workpiece which includes flat or curved sheets of fiber-reinforced composite material, metal or combinations thereof. The cutting tool has a shaft with a longitudinal axis and an axial cutting surface and at least one cutting edge disposed on the axial cutting surface and extending radially from the longitudinal axis with a gap between the radial inner extent of the cutting edge and the longitudinal axis. The method of use includes rotating the cutting tool about its longitudinal axis and also translating the cutting tool during rotation.

Abstract: A method of generating holes in fiber-reinforced metal laminate material is provided, including creating a first bore 18 by passing a cutting element 16 from a first side 24 of the fiber-reinforced metal laminate material 10 to a second side 26, the first bore 18 including first bore sidewalls 19 at least a portion of which includes a taper 28 having a taper diameter 33 and a taper depth 32; passing the cutting element 16 through the first bore 18; moving the cutting element 16 outward of the taper diameter 33; and retracting the cutting element 16 through the first bore 18 to create a second bore 34 having straight second bore sidewalls 36.

Abstract: A hand tool apparatus uses a cutting tool with a first width and a tool axis to machine a hole in an object. The hole has a second width at least as large as the first width of the cutting tool. The apparatus includes a housing, a spindle unit in the housing for rotating the cutting tool and an orbital drive for rotating the spindle unit. An axial feed mechanism moves the orbital drive and the spindle unit jointly either toward or away from the object being machined.

Abstract: A method for forming a cavity in a handle of a ratchet type ring spanner includes providing a ring spanner having a handle and a head extending from the handle, forming a cutout on a face of the head, the cutout being communicated with a hole of the head, placing a cutter in the hole of the head, and moving the cutter toward the handle until a shaft of the cutter is stopped by a periphery defining the cutout, thereby forming a cavity in the handle. The cavity thus formed is larger than that formed by conventional methods. Thus, a larger pawl can be received in the larger cavity, which, in turn, increases the overall torque-bearing capacity of the ratchet type ring spanner.

Abstract: An internal cavity cutting tool assembly includes a tool body, a tool hanger, and a bearing assembly. The tool hanger body has a through-bore that is adapted to receive the bearing assembly. The tool body has first and second body portions, each having an arbor bore, a cutting face having a plurality of indexable cutting inserts, and a bearing support surface. The bearing support surface of the second tool body portion is also received by end of the through-bore, such that the bearing support surfaces of the tool body portions oppose each other within tool hanger body. An arbor drive shaft and a support are operatively inserted though openings in a workpiece and through the arbor bore of the tool body. The arbor drive is retained in a milling device to operatively rotate the tool body assembly while precisely locating the tool hanger assembly, thereby sweeping the cutting inserts against the portions of the workpiece to be cut.

Abstract: A hand tool apparatus uses a cutting tool with a first width and a tool axis to machine a hole in an object. The hole has a second width at least as large as the first width of the cutting tool. The apparatus includes a housing, a spindle unit in the housing for rotating the cutting tool and an orbital drive for rotating the spindle unit. An axial feed mechanism moves the orbital drive and the spindle unit jointly either toward or away from the object being machined.

Abstract: A device for vibration control in a machine for internal turning uses a cutting tool supported by a tool holder, and has a control unit, a vibration sensor connectible to the control unit, and an actuator connectible to the control unit. The actuator has an active element, which converts an A.C. voltage supplied by the control unit to the actuator into dimensional changes. The active element is adapted to be embedded in the body of the tool holder, and is adapted to be embedded in such a manner that the dimensional changes impart bending to the body of the tool holder. A method for vibration control in internal turning and a tool holder for internal turning are provided.

Abstract: An apparatus and method for removing a pressure tube from a nuclear reactor end fitting. A series of grooves are milled in the inside surface of the pressure tube in the area of the roll fitting by means of an elongated milling tool inserted in the pressure tube. The milling tool has a rotary cutter bit that can be controlled for longitudinal and rotational position and depth of cut from the proximal end of the tool. Once the grooves are milled, the milling tool is withdrawn and replaced with an elongated collapsing tool. The collapsing tool has a pair of jaws that engage the milled grooves and draw the wall of the pressure tube inward thereby releasing it from the end fitting. The use of the present invention avoids the requirement to remove both end fittings to replace a pressure tube.

Abstract: For the working of walls which bound the cavity of a continuous casting mold, a machine is used which incorporates machining and/or polishing tools. The machine consists of a machine tool table with an arm introducible into the cavity for the supporting of the tools and a table for the clamping of the mold, as well as devices for generating a numerically controlled relative movement between the tools and the walls. In order to obtain a high accuracy in the working also in the case of a cavity with a conicity varying in longitudinal direction and/or along the peripheral line of a cross-section or in the case of a cavity with special corner configurations, it is proposed that a rotational movement of the tools about axes which are arranged substantially obliquely to the longitudinal axis of the arm be combined with a swivelling movement of the arm about its longitudinal axis.

Abstract: A method of manufacturing aluminum frames for photomask protective films comprises the step of: providing a square-shaped hollow or solid strut aluminum material, fastening the bottom end of the aluminum material to a base of a machine tool, using a milling cutter to fabricate and form a hollow trough for a selected depth in the aluminum material from the top surface thereof, and using a cutting tool to cut off the aluminum material at the periphery of the hollow trough to form individual aluminum frames for the photomask protective films. The method of the invention uses fewer chucks and screw bolts during machining, and can reduce chuck setup time and simplify machining processes.

Abstract: A method for machining a pair of shoe pockets for piston in a swash plate type compressor is disclosed. In this method, the shoe pockets are respectively formed on the opposed walls of the slot in the piston of the compressor while conforming to a single imaginary sphere. The method comprises the step of moving a cutter provided with an arc-shaped cutter blade that has a rotation diameter less than the width of the slot. Thereafter, there is performed the step of relatively revolving the cutter with regard to the piston by allowing the central axis of a revolved part to move along a circular orbit within the slot while rotating the cutter, so as to cut the shoe pockets to conform to the single imaginary sphere. Finally, the step of retreating the cutter out of the slot when the cutter completes one round revolution and is returned to its initial position is performed.

Abstract: A tubular cutting tool includes two or more sets of electrically actuated retractable anchoring legs (52,54) mounted at longitudinally spaced apart locations and an electrically driven rotary cutting head (14) with a retractable cutting blade (14). The anchoring legs can be arranged such that they are capable of compensating for variations in the internal radii of the tubular to be cut, thereby ensuring that the cutting tool is clamped rigidly in position.

Abstract: A hand tool apparatus uses a cutting tool with a first width and a tool axis to machine a hole in an object. The hole has a second width at least as large as the first width of the cutting tool. The apparatus includes a housing, a spindle unit in the housing for rotating the cutting tool and an orbital drive for rotating the spindle unit. An axial feed mechanism moves the orbital drive and the spindle unit jointly either toward or away from the object being machined.

Abstract: A hand tool apparatus uses a cutting tool with a first width and a tool axis to machine a hole in an object. The hole has a second width at least as large as the first width of the cutting tool. The tool axis passes through a predetermined point on a surface of the object. The apparatus includes an actuating assembly including a housing. The housing contains an axial feed mechanism configured for moving the cutting tool in an axial direction, a spindle motor configured for rotating the cutting tool about the tool axis, and a radial offset mechanism. The radial offset mechanism is configured for moving the axial feed mechanism in a radial direction such that the tool axis is offset from a principal axis. A motor is configured for rotating said axial feed mechanism and the cutting tool about the principal axis.

Abstract: A method for machining a variable displacement compressor piston. The piston is connected to a swash plate by a pair of semi-spherical shoes. One end of the piston has a slot for receiving the swash plate. The slot includes a pair of opposed walls. Each wall has a concave spherical recess for supporting one of the shoes. When forming the recesses, a tool having an asymmetrical spherical cutter is placed between the slot walls in the piston. Then, the piston is rotated about a machining axis that is perpendicular to the axis of the piston and intersects the midpoint between the walls. Then, the tool is moved such that the center of the cutter is located on the rotation axis of the piston. This forms the recesses on the walls such that the recesses conform to a single sphere, the center of which is located on the axis of the piston.

Abstract: A debur tool for simultaneously removing burrs from holes in a workpiece, such as those in a header box tube sheet, also has a beveled surface adjacent a cutting edge for chamfering an edge of the hole from which a burr is removed. The cutting edge is horizontally offset from a shaft carrying the cutting edge.

Abstract: A method of producing a hole in a fiber reinforced composite material workpiece includes the step of providing a cutting tool having a shaft, a cutting head, and an axis of rotation. The cutting head has a diameter which is substantially smaller than the diameter of the hole that is produced. The shaft has a diameter which is substantially smaller than the diameter of the cutting head. The cutting head has a height which is substantially smaller than the depth of the hole that is produced. The cutting tool is oriented such that the axis of rotation of the cutting tool is substantially orthogonal to the surface of the workpiece. The workpiece is simultaneously machined in both an axial and a radial direction relative to the longitudinal axis of the hole, by simultaneously rotating the cutting tool around the axis of rotation, moving the cutting tool in an axial direction, and moving the cutting tool eccentrically around the longitudinal axis of the hole.

Abstract: Apparatus for cutting a hole through a plastic liner in a gas or other main comprises a body forming module of a train of modules adapted to travel through the main. The body has a radially movable platform carrying a cutter. The platform has four cams engaging four cams pivotally mounted on tie-bars. Advancing movement of the platform pushes the cams outwardly causing support legs to move outwardly and to cause four slave legs carried by the support legs to engage the plastic liner. Further advancing movement of the platform causes the cutter to engage the liner and also holds the support legs in their advanced position as noses on the cams traverse the faces of the cams.

Abstract: The invention relates to a method of producing concave, self-contained bearing surfaces, which are at least part of spherical indentations which extend beyond the sphere equator, by means of machining involving the removal of material of pre-formed indentations in workpieces by means of a tool having a tool cutting edge orbiting around a tool axis of rotation with an orbit diameter which is equal to the length of a chord extending up to a deepest point of the bearing surface, whereby the cutting movement is made up of the orbital movement of the tool cutting edge and a rotational relative movement between workpiece and tool around a vertical axis through the sphere center, and the feed movement is a movement of the tool relative to the workpiece along the tool axis of rotation which is obliquely set at the same angle of inclination relative to the vertical axis as is the chord set to the sphere equator.

Abstract: A device for working the interior of pipes, with an outer casing, an inner casing which is axially displaceable therein, with a rotary head which carries a bracket for attaching a working apparatus, with respective gearing arrangements each actuated by a motor, one for rotating the rotary head and another for the axial motion of the inner casing, with media-bearing ducts and control and energy supply leads introduced into the outer casing, has the following particulars: The gearing arrangement for the axial motion of the inner casing, the motor actuating this gearing arrangement, the gearing arrangement for executing the rotation of the rotary head, as well as the motor actuating this gearing arrangement, form four subassemblies which can be preassembled separately from one another. A fifth preassemblable subassembly has facilities for forming interfaces for the passage of lines from the inner casing to the rotary head.

Abstract: A method of producing an annular nonuniform groove (106) in the bore wall (104) of a casing (100) and a casing produced thereby is disclosed. The method includes the steps of forming a first portion (164), forming a second portion (172), and forming a third portion of an annular nonuniform groove. The first portion is formed by a first milling tool (168). The first portion defines a starting point (108) as the radial furthest point on the radially outer surface of the first portion. The first portion also defines a first intermediate point (166) as the radially closest point on the radial outer surface of the first portion. The second portion (172) is formed by a second milling tool (174, 180). The second portion is defined along the annular radial outer side wall from the first intermediate point to a second intermediate point (178). The second intermediate point (178) is defined as the radial closest point on the annular radially outer side wall of the second portion.

Abstract: A high-speed carbide rotary cutting tool designed for use in the carving, cutting and shaping of most materials including, but not limited to, wood, ferrous and non-ferrous metals, bone, stone, plastics and composites. It is designed for use in high-speed, hand-held rotary grinders, such as flex shaft hand pieces, die grinders, and other high-speed stationary grinding tools, primarily using 1/4 inch and 1/8 inch shaft sizes. The tool includes a triangular solid carbide cutting head shaped for cutting different profiles. The cutting head is brazed to a mandrel in such a manner as to render the tool one piece.

Abstract: A machine tool to machine a workpiece including linear slide blocks supported one by the other on a pedestal to present a mounting surface for supporting a workpiece, a support head including a rotary indexing table that in turn supports an elongated cutter bar the support head to define an outwardly projecting cantilever end portion that is in turn supported by an outboard support, a cutter tool supported for rotary movement about an axis transverse to the extended length of the cutter bar, a drive means extends along the cutter bar for rotating the cutter tool and a collet chuck for engaging the cutter tool located remote to bearing seats to prevent radial distortion of such bearings when the cutter tool is engaged.

Abstract: A method and apparatus for reconditioning wood wine barrels. An open wine barrel is placed on a barrel rotator stand and positioned into a planer-cutter apparatus. Cutting parameters are set, and a horizontal screw advances the cutter into the barrel, cutting a swath the length of the barrel stave. The cutting process is repeated through the number of passes required. The barrel is dried, placed on a toasting rotator stand, and positioned under a toaster so that the toaster elements are inside the barrel. An expansion mechanism places the toaster elements adjacent the barrel interior surface, and the barrel ends are closed. After toasting, the expansion assembly is retracted and the barrel is removed. The barrel heads are run through a planer, dried, and sanded, and placed in a head toaster. The head toaster doors swing closed placing the heads adjacent oscillating firebars.

Abstract: An apparatus and method for perforating corrugated plastic pipe from the inside of the pipe to the outside and the pipe produced by the method. The apparatus has a perforating device attached to an elongated support member. Perforations are created by advancing pipe over the perforating device or by advancing the perforating device into the interior of the pipe. Where the pipe is advanced over the perforating device, a carriage, holding the pipe, is riding on a track which guides the pipe into engagement or into cutting or perforating proximity with the perforating device. The perforating device includes a housing holding motors with cutters attached to them. The cutters cut the inner corrugations or the valleys of the pipe as the pipe is passed over the perforating device. Pipe is perforated by advancing it over a perforating device, and curing the pipe from the inner pipe surface to the outer pipe surface.

Abstract: This invention relates to an apparatus and method to modify molding machines for producing colored plastic parts using coloring liquid. The apparatus is inserted into and moved longitudinally along an injection molding machine barrel for forming a groove of varying shape and depth in the lower portion of the barrel.

Abstract: An apparatus is provided to allow a conventional tube grooving tool to be used to create a vent hole in a tube behind the tube sheet of a boiler or other tubular heat exchanger without cutting a hole or grove in the entire circumference of the tube. The apparatus includes an eccentric or a canted guide that is positioned within the end of the tube to guide the tool holder having a grove cutting tool mounted on it. The guide offsets the tool holder and the cutting tool from the centerline of the tube so that the cutting tool only cuts into a portion of the inside surface of the tube.

Abstract: The invention provides that where a main underground pipeline or passageway (10) is lined by a lining tube which extends over the connection of a lateral pipe (12) with the main pipeline or passageway (10), the lateral connection can be readily located and the lining tube (44) cut to re-establish the connection, if such as a steel ball or other deposit, which is radiation detectable, is placed on the surface of the pipeline or passageway (10) at a predetermined distance (77) from the said lateral connection.

Abstract: An installation method for security switches located in door jambs and connection into security system wiring is provided together with a mounting fixture for simplifying the installation. To avoid wall damage, with cylindrically packaged security switches inserted snugly in a hole drilled part way through a door jamb a few inches from the floor, an installation fixture holding a drill at an angle is inserted into the switch mounting hole for drilling at a desired angle a system wire passageway hole into the switch mounting hole wall to extending downwardly through the floor. Another drill held in the fixture at a different angle permits routing of the mounting hole wall form a wire transit channel axially adjacent to an inserted switch for passing the system wires back to connect with the security switch.

Abstract: An apparatus for cutting a path of propellant grain away from a solid rocket motor. The apparatus includes a telescoping arm connected to a rotatable body. A cutting tool having a primary and secondary cutter is connected to a distal end of the telescoping arm. The secondary cutter is disposed adjacent the primary cutter and configured to make cuts through the portion of propellant grain along the path such that the grain is cut away from the rocket motor in a plurality of pieces. The telescoping arm includes a plurality of interconnected extendable concentric cylinders configured with a plurality of ball/spring detents each bearing a resistance load for restraining one of the concentric cylinders such that the innermost unextended of said concentric cylinders extends prior to the extension of any other of said unextended concentric cylinders.

Abstract: A stand-alone deburring apparatus greatly facilitates accurate deburring of difficult-to-access burrs located inside tubes, and does so in a manner which eliminates the need to tie up another more cumbersome and costly piece of machinery, such as a drill press. The apparatus includes a base plate, a motor with a horizontal shaft mounted to the base plate and a deburring body mounted vertically, adjacent the end of the shaft. The shaft coacts with toothed gears inside the body to rotatably drive the gears and a horizontally-oriented countersink coupled thereto. An adjustable collar provides a support surface or platform for supporting a tube to be deburred in alignment with the axis of the vertical body. With the vertically-oriented body, the horizontally-oriented countersink and the adjustable collar, the inside of a tube may be easily deburred while held in vertical orientation.

Abstract: An apparatus for cutting a path of propellant grain away from a solid rocket motor. The apparatus includes a telescoping arm connected to a rotatable body. A cutting tool having a primary and secondary cutter is connected to a distal end of the telescoping arm. The secondary cutter is disposed adjacent the primary cutter and configured to make cuts through the portion of propellant grain along the path such that the grain is cut away from the rocket motor in a plurality of pieces. The telescoping arm includes a plurality of interconnected extendable concentric cylinders configured with a plurality of ball/spring detents each bearing a resistance load for restraining one of the concentric cylinders such that the innermost unextended of said concentric cylinders extends prior to the extension of any other of said unextended concentric cylinders.

Abstract: An apparatus and method for cutting a hole in a liner installed in a conduit. Included in the apparatus is a carriage and a cutting head that are rotated to cut the liner. A lateral axis extends through the carriage. A skid constrains the carriage and the cutting head. The cutting head is substantially positioned over the center of gravity of the carriage to provide stability during cutting. The cutting head moves vertically with the use of a cam. The cutter also moves laterally and may rotate about the axis when cutting the hole. Prior to cutting the hole, the skid extends outward to hold the carriage in place. The apparatus also includes a specialized cutter having cutting bars along its outside perimeter and along its top surface.

Abstract: An improved robotic cutter for re-establishing lateral connections in a lined sewer pipe is disclosed and claimed herein. The improved robotic cutter disclosed herein is a relatively small, lightweight cutter in which the cutting tool can be made to scribe a true circle, thus ensuring a true circular cutout of the lining blocking a lateral connection.

Abstract: A method and apparatus for porting lateral connections in a lined pipeline from the lateral side of the liner. An access hole is formed through the liner material covering the lateral connection. A cutting apparatus, such as a water cutter, is inserted through the access hole with the nozzle directed back towards the liner. Alternatively, the cutting apparatus can be fed through the lateral towards the lined opening. The inside surface of the lateral pipe is then used as a guide to aim the water jet at the precise location where the cut is desired as the nozzle is revolved around the inside surface of the lateral to cut the liner to the shape of the connection opening.

Abstract: Device for producing a drilled hole with an undercut in a facing panel, consisting of a drilling machine and a drilling tool for forming the drilled hole connected to the drilling machine via an adapter for transferring torque; and a holding device of a supporting stand having a swivel bearing for holding the drilling machine so that it can swivel with the drilling tool attached to it. To extend the service life of the drilling tool the adapter consists of a drive part connected to the drilling machine so as to transfer torque and a tool holder connectable with the drive part and a device for releasably securing the tool holder to the drive part so that the center line of the tool holder is inclined relative to the center line of the drive part, which is aligned with the drive axis of the drilling machine, so that only a portion of the circumference of the drilling tool engages the panel during formation of the drilled hole.

Abstract: A machining device is described which, after an old mains conduit has been decontaminated, that is, after it has been covered with a fluid-tight sheath, permits the obstructed secondary branches to be restored from inside the conduit.This device is made up of two modules, the first mitting the longitudinal and angular positioning of the piercing tool placed on the second module.A motor permits giving simultaneously the movement of rotation and that of advance of the tool by a set of gears.

Abstract: A device for producing drilled holes with an undercut, especially in facing panels, has a drilling machine, a drilling tool, an adaptor receiving the drilling tool and connected with the drilling machine so as to transfer torque, a holder, a bearing bush secured in the holder and provided with a rotatable and swivelable guide sleeve, a wobble plate secured on the drilling machine and the guide sleeve, a plurality of cylinders arranged on the holder concentrically about a center line of the guide sleeve and engaging the wobble plate. The cylinders are actuated and controlled in succession to produce a wobbling movement for reaming out an undercut in a drilled hole.