Abstract: A combined clamping and cutting tool for manually cutting plastic pipes. The cutting portion includes a pair of elongated members pivotally mounted to each other with each elongated member having a handle section and a cutting section. Cutting wheels are rotatably mounted to each cutting section. The clamping portion includes at least three members with the first and second members pivotally mounted to each other and the second and third members pivotally mounted to each other. The first and second clamping sections respectively have a pair of spaced-apart, parallel legs that firmly and slidably receive the cutting sections of the cutting portion therebetween. Interlocking tracks are also provided to maintain the clamping and cutting portions together during use and to provide an interaction between the two portions to aid in opening them to receive the pipe.

Abstract: A pliers-type pipe or tube cutter includes first and second members pivotably movable with respect to one another. At least one adjustable cutting wheel is supported on one of the opposing jaw portions to be operably engagable with a tube or pipe to be cut. In addition, at least one cleaning element is supported on one of the opposing jaw portions for operable engagement with an exterior surface of the tube or pipe during the cutting process.

Abstract: A rotatable tube cutter for cutting a tube-like work piece is disclosed. This rotatable tube cutter mainly comprises a fixing portion, a rotatable portion, a cutting blade assembly, and a feeding assembly. By rotating a feeding knob, the feeding amount can be easily controlled. So, this invention is easy to operate by one hand. It is able to work in a limited available space via repeating lift and press movements. It is possible to work in the traditional full circle rotation method. And, it has manual and automatic dual feeding modes.

Abstract: A motorized device for cutting and cleaning a piece of pipe for more quickly and efficiently working with piping. The motorized device for cutting and cleaning a piece of pipe includes a housing that has a pair of opposite ends and at least one pair of protruding portions being formed on one of the ends. At least one motor that has a motor shaft is mounted in the housing. A power supply is mounted in the housing for selectively providing power to the motor and at least one switch is mounted on the housing for selectively providing power to the motor. At least one attachment is removably mounted on the motor shaft for engaging a pipe.

Abstract: A rotatable tube cutter for cutting a tube-like work piece is disclosed. This rotatable tube cutter mainly comprises a fixing portion, a rotatable portion, a cutting blade assembly, and a feeding assembly. By rotating a feeding knob, the feeding amount can be easily controlled. So, this invention is easy to operate by one hand. It is able to work in a limited available space via repeating lift and press movements. It is possible to work in the traditional full circle rotation method. And, it has manual and automatic dual feeding modes.

Abstract: A pipe cutter comprises a fastening mechanism including two pivot members on both sides of a top recess, two bifurcated pivot links, two rollers on top ends of the pivot members, an upper rotary blade, and a lower transmission mechanism. The transmission mechanism is operative to pivot the fastening mechanism for forming a three-point support (i.e., the rollers and the blade) of a pipe to be cut. A number of configurations of the cutter are possible.

Abstract: A cutting head for a portable, hand-held, power-operated pipe cutter is constructed with at least one channel in a rotating mounting plate assembly, to permit lateral insertion of a pipe. The power-transmission arrangement employed includes at least one component that effectively spans the entrance to the channel in the mounting plate so as to ensure that driving engagement therebetween is constantly maintained.

Abstract: A cutting head for a portable, hand-held, power-operated pipe cutter is constructed with channels to permit lateral insertion of a pipe. The power-transmission arrangement employed includes at least one component that effectively spans the entrance to the channel in the mounting plate assembly so as to ensure that driving engagement is maintained constantly therebetween.

Abstract: A pipe cutting apparatus comprises at least one work-holding fixture and a cutting device pivotable about the axis of the pipe to be cut and having a cutting tool and drive. The cutting device is movable manually and/or by means of at least one transmission gearing for the feed of the tool about the pipe to be cut. The transmission gearing has a spur gear interacting with a crown gear.

Abstract: An apparatus for paring tubular articles (R), especially for plastic tubes, has at least one support unit (10) for supporting the article (R) to be pared, a paring unit (40) which has a paring head (44) with at least one blade assembly (46) and at least one guide assembly (48), and a carrier unit (70) to which the support unit (10) and the paring head unit (40) are held in mutually spaced relationship. The paring head (44) is pivotable about a pivot axis (50) which extends at least approximately perpendicularly to the plane defined by the support unit (10) and the paring unit (40).

Abstract: The present invention is a C-shaped plastic tubing cutter having a C-shaped grasping portion and a fixed cutting blade. The grasping portion has an opening for receiving the tubing whereby the width of the opening is measurably smaller than the diameter of the tubing to permit snap engagement of the tubing into the grasping portion upon sufficient force and retention therein. In addition, the inner diameter of the grasping portion can be measurably smaller than the outer diameter of the tubing to promote securement of the tubing within the grasping portion to better facilitate precision cutting. Once engaged, a grasping bias force brings the inner surface of the grasping portion into substantial circumferential contact with the tubing to again promote securement and cutting. The circumferential contact is greater than 50 percent, and generally less than 75 percent, of the tubing circumference.

Abstract: A pipe cutter includes a handle, a power-forcing handle, a position recovery member, a drive device, a revolving member, and a cutter device combined together. The handle and the power-forcing handle are pivotally combined together, and pressing the power-forcing handle toward the handle to force the drive device to revolve the revolving member and the cutter device to cut off a pipe placed in the revolving member. The pipe cutter is easy to handle by only pressing the power-forcing handle in cutting a pipe.

Abstract: A pipe cutting device for cutting copper pipes, in particular, to length. The pipe cutting device includes a handle member; and also includes a cutter support assembly being attached to the handle member; and further includes a cutting member being rotatably mounted to the cutter support assembly; and also includes rollers being disposed in the cutter support assembly for facilitating rotation of a pipe being cut; and further includes an adjustable closure assembly being attached to the cutter support assembly.

Abstract: A tubing cutter for cutting thin walled metallic tubing of the type used for electrical conduit. The tubing cutter is of the type which supports the tubing being cut between a roller or rollers and an oppositely disposed rotary cutting wheel of a given radius located within the head of the cutter, the cutter being rotated around the tubing to cause the cutting wheel to cut into and through the wall of the tubing. The cutter is prevented from cutting all the way through the wall of thin walled metallic tubing by means of a depth gage stop member which contacts the tubing to terminate cutting. The depth gage stop member can be stationary or rotary, and is comprised of a pair of legs or rollers placed on each side of the rotary cutting wheel. The length of the legs or the radius of the rollers are less than the radius of the rotary cutting wheel by a distance that represents less than the wall thickness of the tubing to be cut.

Abstract: A tube cutter for cutting a circular tube having a central tube axis, the cutter comprising: a housing with first and second parallel rollers defining a cradle for receiving a tube cut with the tube axis generally parallel to the axes of the rollers, a cutter head reciprocally mounted on the housing for sliding linearly in a direction toward and away from the rollers, the cutter head having a base and an upstanding arm supporting a cutter wheel rotatable about an axis generally parallel to the axes of the rollers and facing the tube in the cradle, a spring element biasing the cutter wheel in the stated direction and toward the rollers, and a threaded shaft between the housing and cutter head, and rotatable to move the cutter head linearly toward the housing, whereby the cutter wheel engages the tube and the spring element creates a cutting force pushing the cutter wheel against the tube for cutting the tube.

Abstract: The present invention relates to a pipe cutting device for cutting a pipe or conduit. The device includes a first supporting portion and a second supporting portion associated with the first supporting portion. The first and second supporting portions are configured and dimensioned to at least partially encircle an opening to encompass a pipe to be cut. The device also includes at least two cutters positioned in one of the first and second supporting portions for engaging a pipe to be cut, the cutters being interchangeably rotatable between a circumferential cutting direction and a longitudinal cutting direction. The device is movable relative to a pipe to be cut and cuts the pipe interchangeably in either the longitudinal cutting direction or the circumferential cutting direction. Cutting in the longitudinal cutting direction creates at least two substantially longitudinal cuts in the pipe and cutting in the circumferential direction creates a circumferential cut in the pipe.

Abstract: A hand-held apparatus for cutting transversely a pipe using a slitter co-operating with rollers to produce a deepening cut, is formed of two half-shells mounted opposite around the pipe with adjustable clamping elements one at least supporting a slitter or radially mobile, in the cutting plane, and the other, at least two rollers rotating in the cutting plane and arranged in pair facing each slitter on the other half-shell to compensate the cutting force in the assembly rotation about the pipe resulting from the cooperation between a tangential driving tool and catching elements distributed over the outer surface or on the periphery of each half-shell.

Abstract: A hand tool that is self-adjusting by alternately squeezing and relaxing the hand grip on the two handles, and that has substantially parallel jaws during closing adjustment. In one embodiment, the jaws have opposing gripping surfaces. In another embodiment, the jaws have opposing cutting blades. All of the operations, except the resetting of the adjustable jaw to a wide open position, can be accomplished with just one hand holding the tool.

Abstract: A motor driven, hand-held tubing cutter is disclosed, which can be held stationary by a worker while cutting the tubing, and does not require that the tubing be held in a vise or other clamping tool. The device is reversible, and upon completion of the cut, the device can be reset automatically to its initial position to receive a subsequent length of tubing for cutting. The tool has a motor-rotated cutting head into which the tubing to be cut is inserted, one or more cutting blades which are urged into cutting contact with the tubing wall by the motor-driven rotation of the head in cooperation with indexing bosses, and, once the tubing is cut through, reversal of the driving motors causes the blades to be retracted into the head, resetting the tool for further cutting. The tool may be used to cut any cuttable metal or plastic tubings, including tubing of aluminum, brass, copper, steel, ABS, PVC, polycarbonate, phenolic, etc.

Abstract: A soil pipe cutting device comprising a pair of pivotally interconnected arm members having jaw ends and actuator ends and a flexible, non-extendable cutter chain adjustably mounted between the jaw ends to circumscribe a pipe to be cut is provided with a screw-type actuating mechanism for displacing the jaw ends in the direction to tension the cutter chain to sever a pipe, and with a handle removably and adjustably mounted on the actuator end of one of the arms for transporting the cutter and for supporting and manipulating the cutter during a pipe cutting operation.

Abstract: A tube cutter and process for cutting tubes, including a housing with a gear cluster therein and with the cluster providing for two separate drive controls to the cutter and the supporting rollers, both of which engage the tube to be cut. The drive controls are arranged to be relative one to the other so that the feed of the cutter against the tube to be cut can be regulated. Regulation may be achieved by different motor speeds or by a brake mechanism. The cutter automatically adjusts radially to the tube and revolves therearound in the cutting process.

Abstract: A new cutting device for cutting tubing and piping. The inventive device includes a housing having separable first and second portions. The first and second portions each have an inner face and are pivotally coupled together such that the first and second portions are pivotable with respect to one another between an open position and a closed position. A bore extends between the first and second faces of the housing. The second portion of the housing has a pair of rollers mounted in the interior of the second portion. The rollers are positioned adjacent the bore such that a portion of each of the rollers extends into the bore. The first portion of the housing has a slot extending between the perimeter side wall and the inner face of the first portion of the housing. The slot also has an opening into the bore. A disk shaped cutting blade is disposed in the slot and mounted to the first portion of the housing such that a portion of the cutting blade extends into the bore.

Abstract: A portable cutter for cutting materials such as conduit tubing made of metal or other semi-rigid material including a motor, a power source for the motor, a saw blade, gripping mechanism for gripping an object to be cut, mechanism for automatically connecting the power source to the motor for a cutting operation, and mechanism for automatically activating the gripping mechanism.

Abstract: A cutting tool for cutting pipes or tubes, and in which the cutter has a pair of driving wheels, which can be driven by either AC or DC power. The driving wheels are positioned adjacent a cutting wheel that is operated by a lever to advance the cutting wheel against the item to be cut. The cutting wheel is locked against the item to be cut by a releasable latch. In addition, a deburring tool is provided which can be attached to remove any irregularities in the cut pipe or tube.

Abstract: A tube saw has a housing body with a first side, a second side, and a central opening. Surfaces of the first and second sides are machined parallel to each other. A cutter with a rotating blade is mounted on the first side and a vice is mounted on the second side to thereby maintain a work piece held in the vise perpendicular to the cutter. An indicator pin and viewing hole facilitate aligning a work piece within the saw so that the blade will cut the work piece where desired.

Abstract: An automatic adjusting pipe cutting apparatus includes a housing having a first compartment defining a first cavity and a first axis of rotation extending in orthogonal relationship thereto and a second compartment defining a second cavity and a second axis of rotation extending in orthogonal relationship thereto, a cutting mechanism for cutting a pipe disposed in the first cavity, and a driving mechanism for driving the cutting mechanism disposed in the second cavity. The housing has a hinge disposed between and connecting the first and second compartments which allows them to pivot in relation to one another. The housing also has rollers circumferentially spaced apart from one another and rotatably mounted to the first compartment about the first cavity. The cutting mechanism has a cylindrical frame supported within the first cavity by the rollers and thereby is rotatable about the first axis of rotation.

Abstract: A blade spacer for use in the cutting a length of corrugated tubing with a cutter of a variety including a rotary cutting blade rotatable circumferentially about the tubing within a plane defined by a radial axis of the blade. The spacer is mountable to the cutter coaxially with the axis of rotation of the blade for positioning the blade within a root portion of the tubing such that the radial axis of the blade is aligned within the root portion to define the plane as being generally equidistant from the side walls of the root portion and as being generally perpendicular to the central longitudinal axis of the tubing. The spacer is provided to invest the lateral surfaces of the blade centrally therewithin and as having a generally circular periphery extending radially outwardly from the axis of rotation of the blade to a bushing region.

Abstract: A pipe cutter having an over-center feature which facilitates automatic charging of a spring to which a cutter is mounted.

Abstract: A self contained power driven, adjustable tube cutting tool is disclosed. Within the main tool housing is a rotatably mounted C-shaped body having an adjustable automatic cutter feeding and retract mechanism therein, operable by the rotational movement of the body about the pipe axis. Opposing a set of pipe backup rollers is a cutting wheel attached to post slidable through the center bores of two mating cylindrical bodies all on a common longitudinal axis. The mating faces are spirally configured through a single rotational turn to create linear expansion and contraction of the bodies as one, integrally attached to a ratchet wheel, rotates while the other does not. A spring biased pawl couples the non-rotational body to the sliding post. The ratchet wheel engages a second spring biased driving pawl pivotally attached to a cylindrical sliding roller body which protrudes from the periphery of the cutting wheel body.

Abstract: A cutting tool for severing the end of a copper tube or the like, the tool having a cylindrical post for insertion into the tube end, and a pivotal beam having a cutter wheel mounted at one end. A rotatable knob is mechanically linked to the pivotal beam to cause it to pivot toward and away from the cylindrical post. The entire tool may be rotated about the axis of the tube while the cutter wheel is in contact with the tube to cut a circumferential groove into the tube and thereby to sever the tube.

Abstract: A cutter for effecting severing of a conduit. The inventive device includes first and second handle members pivotally coupled together and including first an second jaws. Cutting assemblies are supported within each jaw and include a pail or spaced and rotatable cutting disks which engage an exterior of a conduit to effect cutting thereof during manual rotation of the tool.

Abstract: A tool for cutting tubular members has a rotatable cutting assembly adapted for mounting on the end of a tool body. The cutting assembly includes a rotatable base member having two support elements which support two cutting heads on the base member. The support elements are each pivotally mounted on the base member such that rotation of the base member causes each support element to pivot around an independent axis. Each support element has one or more weights located on one side of the axis and a cutting head located on the other side of the axis. Centrifugal force developed during rotation of the base member cause the weights of each support element to swing radially outwardly while the cutting heads pivot radially inwardly into cutting contact with the tubular member and cutting same.

Abstract: A hand operated tubing cutter adapted to apply a selectable force to tubing to be cut, with the cutter having an elongate, substantially "C" shaped body member and defining a recess for receiving a piece of tubing to be cut. A spaced pair of rollers is operatively mounted in the central recess, directly against which rollers a piece of tubing to be cut is to be placed. An elongate cavity is disposed in the body member in substantial alignment with the pair of rollers, and an elongate ram member is slidably disposed in a non-rotatable manner in the elongate cavity, one end of which ram member supports a cutter wheel. The cutter wheel is rotatably supported in an opposed relationship to the rollers, and a rotatable adjustment device is located on the body member at a location comparatively remote form the rollers. A compression spring is disposed in the body member and operably interconnected with the ram member.

Abstract: This invention provides for a pin cutter which forms an annular groove about the periphery of the pin. The cutter includes a cutting wheel that is rotated relative to the pin and is gradually tightened to force the cutting wheel into the pin and thereby widen the groove. The cutting action is similar to a pipe cutter used by plumbers to cut a length of copper tubing. The operator can continue tightening the cutting wheel against the pin until the pin is severed. A portion of the pin extends through the housing of the cutter. Since the pin is gradually cut, less force is required to sever the pin. Further, less force is released by the pin as it is severed. The severed and free portion of the pin is retained within the housing in a controlled manner.

Abstract: A tube cutter unit in one embodiment with self centering tube cutting and supporting jaws is rotated by a power drive unit for cutting a tube. The jaws are free to engage the tube without spring load. After engagement with the tube, a relatively high load spring is deflected to induce a tube cutting force on the jaws. The amount of deflection of the spring determines the depth of cut. A separate tool operating socket is also rotatably driven with the cutter unit. The cutter unit is coupled to the drive by a one way clutch. The drive is reversible to selective operate the cutter unit. In a second embodiment, a cutter unit without self centering jaws is separated from a power drive for manually operation and connected to the power drive for power operation. The power operator is reversible for selectively operating the cutter unit. The latter cutter unit also does not provide a spring load on the jaws except for providing a cutting force after the jaws engage the tube being cut.

Abstract: Pipe clamping device on manual pipe cutters, in which there are two bearing points for the pipe on the head of the pipe cutter, a lever being pivoted on the head of the pipe cutter with a head for its bearing in working position on the pipe and a toothing for its locking with a pawl, and a spring is placed between the lever and the head of the pipe cutter, which tends to position the lever in open position.

Abstract: A pipe cutoff apparatus comprises a frame having two frame parts, which are clamped together, wherein said apparatus comprises guides for a cutter device movable around the pipe to be cut. A pipe clamping device with clamping jaws is arranged at one frame part and clamps the pipe in a centered position with respect to the frame.

Abstract: A pipe cutting device for cutting tubing and other cylindrical objects comprises a frame with a handle portion at one end thereof and an upper jaw portion at another end thereof. A cutting roller is rotatably supported in the upper jaw portion. A slide carriage is slidingly mounted on the frame and a power-driven roller is rotatably supported in the slide carriage. The slide carriage with the power-driven roller forms a lower jaw disposed opposite from the upper jaw, and the upper and lower jaws define a cutting space for receiving tubing or other cylindrical objects to be cut. The slide carriage is slid in a direction towards the upper jaw for narrowing the cutting space during a cutting operation. A power motor drives the power-driven roller.

Abstract: A rigid housing has an axially extending opening which receives a length of cylindrical tubing therethrough. A measuring assembly is mounted to the housing and has a circular friction wheel which is rotatable about an axis which is perpendicular to the axis of the tubing. The friction wheel extends into the opening into engagement with the tubing, such that as the tubing is advanced through the housing, the wheel is turned. An encoder wheel is fixed to the friction wheel to allow a photodetector to determine the angular displacement of the wheel. An electric controller receives signals from the photodetector and calculates the linear length of tubing which has passed beneath the wheel and displays this on a liquid crystal display. A cutting assembly is mounted to the housing and spaced axially from the measuring assembly. The cutting assembly has a cutting blade which is rotatable about an axis substantially perpendicular to the friction wheel axis.

Abstract: A fish fin remover that is capable of guiding a fish fin to be removed through a clearance to a rotary blade without difficulty for cutting the fin at its root accurately. The fish fin remover includes a guide frame having a step which allows the circumferential edge of the rotary blade to be accommodated in the guide frame so that the bottom of the guide frame across the clearance of the guide frame is substantially on a level with the lower surface of the rotary blade.

Abstract: A hand tool or grooving or cutting pipes has an aperture for receiving a portion of pipe, and adjustable support means. A cutting or grooving wheel is displaceable along a predetermined path to cause it to move radially relative to the pipe, as the tool is manually rotated round the pipe.

Abstract: A tube cutting tool is described in which a cutting head is rotatably mounted within a tool body wherein both define "O" shaped openings to enable tubing to be inserted perpendicularly through the tool. A cutting wheel is incorporated into the cutting head such that rotation of the cutting head causes the wheel to pass around the periphery of the tube. A feed cam and lever device are incorporated which mechanically bias the cutting wheel into contact with the tube wall until the tube wall has been completely severed. A gear drive assembly transports power from a power source to the cutting head to rotate it about the tube. Stabilizing devices are utilized to help secure and align the tubing into the cutting tool during operation.

Abstract: A tubing cutter comprising a pair of arms pivotally connected together adjacent one end, with the opposite ends of the arms free. Such opposite end of one of the arms has thereon a rotatably mounted cutting wheel, and upon the opposite end of the other of the arms at least one roller is utilized, in opposed operative relationship to the cutting wheel. A tightening arrangement, preferably in the form of a finger operated wheel mounted on a dually threaded shaft, is utilized for enabling the user to draw the free ends of the arms together, so as to force the cutting wheel into cutting contact with a piece of tubing placed between the rotary cutter and the rollers. Thus, upon relative rotation occurring between the cutting wheel and the tubing, the severing of the tubing can be readily brought about. Preferably a spring bias arrangement is utilized, which serves to assist the tube severing procedure by biasing the cutting wheel into firm contact with the tubing to be cut.

Abstract: A tool for cutting tubing or light pipe provides conventional cutting rollers and a blade in combination with a spring loaded, open jaw clamp. The open jaw permits the tool to be passed over the side of the material to be cut, while the spring compressive force automatically urges the cutting blade into the material being cut as the tool is rotated around the material in the manner of conventional tubing and pipe cutters. Thus, the need to continually adjust the cutting blade as the cut deepens is eliminated. Two basic embodiments are disclosed, one comprising a handled clamp type tool with or without foldable or extendible handles, and the other comprising a C clamp type tool. The spring loading arrangement of the cutting blade is common to both. Various versions and improvements are also disclosed, including mechanisms providing for parallel actuation of the cutting assembly, proper spacing of the cutting rollers, and maintaining the proper angular relationship between the rollers and the cutting blade.

Abstract: Method and apparatus for skullcap and other bone cutting during autopsy. A power driven rotary cutter in the form of a circular blade saw is mounted on a carrier which moves around the skull of the cadaver and permits the cutter to move radially, toward and away from the axis of the skull. A follower which engages the skull controls the depth of cut so that only the skull bone is cut without damage to the brain tissue in the skull. The cutter is driven by a cable from a remote motor to minimize the weight of the cutter assembly on the carrier. The casing in which the cutter is mounted can be a handpiece of a cable driven tool. The cutter can also be used manually by removing the handpiece from the carrier. Power to the cutter is controlled so that the cutter cuts only bone and stops when soft tissue is engaged by the cutter, which avoids serious damage to soft tissue, and also avoids serious injury to the user if the blade slips.

Abstract: A cutting device is provided for opening the container of a standard oil filter and comprises a rigid mounting frame; first and second support disks rotatably mounted to the mounting frame, the first support disk including an outer edge which is roughened so as to frictionally grip the oil filter; a handle for rotating the first support disk; and an adjustable, rotating cutting blade, the cutting blade made adjustable by an advancing mechanism such as a screw. The first and second disks and cutting blade are disposed relative to each other so as to support the oil filter when the adjustable cutting blade is properly positioned. The oil filter is then rotated by the handle such that the cutting blade effectively separates the top and bottom portions of the oil filter.

Abstract: Cutter for tube or pipe, including a drive head, an elongated main body having one end carried in the head, and a cam element carried on the other end of the main body. The head, body, and element have aligned similar bores to receive a tube. The main body carries cutters which move radially inwardly of its bore to engage and cut the tube when the main body is rotated about the axis of its bore relative to the head and the cam element.

Abstract: A tube cutter consisting of two frame portions or jaws, being pivoted to one another at their end portions, and further interconnected at their intermediate poritons by a large bolt through which the jaws will move relative to one another about their common pivot. The free end of one jaw carries anvil rollers, and the other jaw free end carries a discoid knife, the anvil roller and knife cooperating in tangentially cutting a tube extending transversely between the jaws free ends. The knife is freely caried by a jaw axle, which is itself freely releasably engaged through the jaw. A spring-loaded band within the knife containing jaw casing frictionally yet releasably locks the knife axle, and thus the knife, in position, by engaging a diametrally smaller portion of the knife axle.

Abstract: A pipe cutter is disclosed in which a housing carries a disk which is rotated selectively in a forward direction or in a reverse direction by a power drive. The disk has a pipe receiving slot extending to the central axis of rotation of the disk for receiving a pipe to be cut. A cutter blade and rotatable roller are disposed on the disk in symmetrical locations about the central axis of rotation, the cutter blade being adapted to move linearly into and out of contact with the pipe which is inserted into the receiving slot. The roller, which preferably is a pair of spaced rollers, is engageable with the outer peripheral surface of the pipe at a location generally opposite to the location of the cutter. A holder for supporting the cutter blade is mounted on the disk for rotation therewith about the central axis of rotation and is also mounted for linear motion toward and away from the central axis of rotation.

Abstract: A pipe severing device (1) and method utilizing a chain (13) having stress inducing wheels (19) efficiently and safely severs brittle materials including cast iron, vitreous clay, cement and asbestos pipe. The device includes an actuating handle (6) which pivots over a pipe support surface (3). Upon pivoting over the surface, holddown arms (7) attached to the actuating handle frictionally grasp a pipe. The handle may then pivot about a second point or remain rigid, in either case engaging a first limit switch (25) which actuates a hydraulic cylinder (35). The hydraulic cylinder tightens the chain causing the stress inducing wheels to create stress concentration points around the circumference of the pipe. Cracks propagate between stress concentration points, quickly severing the pipe. The pipe support surface includes resilient pads (5a,b) which further frictionally grasp the pipe.