Abstract: An apparatus having improved safety and performance characteristics for the removal of a coating from a tubular member, and particularly adapted for the removal of a concrete weight coat from submerged oil pipelines, comprising a generally C-shaped rigid frame member which is maintained in proper alignment by contact with the upper coated surface, is provided with a plurality of opposed, inwardly directed driven crusher blades located proximate the ends of the frame member and controlled driving means which are adapted to move the crusher blades. The method comprises positioning the apparatus on the coated pipeline, crushing the coating, raising the entire apparatus to free the fractured coating from the pipeline, retracting the crusher blades, and moving the apparatus to a new position on the pipeline.

Abstract: A pipe cutting machine having a pair of parallel, horizontal driven rollers for supporting and rotating the work to be circumferentially cut. A cutter head assembly includes a free rotating cutter wheel on a shaft generally parallel to the driven rollers. Coarse vertical positioning of the cutter head is effected by sliding it up or down over a generally vertical support column. Detenting of this vertical positioning is effected by a spring-loaded pin engaging a selected groove among a plurality of vertically spaced, horizontally extending grooves associated with the vertical column. Vernier advancement of the cutter into the work is accomplished by an eccentric and lever arrangement associated with the cutter head assembly.A gear box arrangement couples the torque of a driving motor, which may be permanently or removably attached, providing drive to the rollers and to a reamer. A hand drill is shown positioned to provide motive power.

Abstract: A pipe cutting device comprises a housing to which a tool case is attached to be rotatable, and by rotating manually or electrically the tool case so that the openings of the tool case and a follow-up gear disposed in the tool case substantially align with the opening provided for the housing, is formed a pipe inserting passage for inserting a pipe from the opening side of the openings of these members towards the central portion of the tool case. Two driving gears meshed with the follow-up gear are driven by a motor through the power transmission mechanism to rotate the tool case. The rotation of the tool case drives the cam roller to operate the cam plate, and the clutch arm is rotated by predetermined angles by every one rotation of the tool case thereby to minutely rotate the eccentric cam by predetermined angles through the one-way clutch. The rotation of the eccentric cam rotates the lever mechanism which is operatively connected to the cutter.

Abstract: A chain tube cutter has two plier-like levers with hand grips on one side of a pivot pin which projects from one lever through a slot in the other and chain-engaging arms on the other side of the pivot pin. A link cutting chain is secured to one arm. The other arm has notches for engaging a selected link of the chain after it is wrapped around the tube to be cut. Squeezing the hand grips together generally keeps the chain adjusted about the tube as it is cut by rotating the cutter relative to the tube, but to provide greater initial and operational adjustment, the pivot pin is variably positionable in the slot.

Abstract: Tool for cutting of plastic tubes comprises an arm portion (1) and at the end of the arm portion a first jaw (2) and a second jaw (3) forming an opening (4) therebetween for insertion of a plastic tube (10) into the opening. The tube is arranged to be cut by a rotational movement (A) of the tool and the tube relative to each other and for accomplishing this, the first jaw (2) is provided with a circular cutting blade (6) and the second jaw (3) is provided with several support areas (9a, 9b, 9c, 9d) for accomodating of tubes of diferent sizes, the areas having each an arcuate surface. The support areas are arranged, as seen in the insertion direction (B), one after the other so that of two successive areas (9a, 9b), the area (9a) further back is adapted to hold a tube of smaller size than the area (9b) in front of it.

Abstract: A device for removing a weld bead from the external periphery of a plastic gas pipe.The device (FIG. 2) has a body 10 with an inclined reaction surface 13 and a blade 21. The blade 21 is engaged with a bead 22 and the portion 22a of the bead 22 which is lifted is gripped between a toothed wheel 17 and the inclined surface 21. As the wheel 17 is rotated by use of a lever 18 operating via a ratchet, the device is moved bodily around the circumference of a pipe 31 to remove the bead 22.Retractable and adjustable stabilising means 25, 28 etc. are provided and there is a hardened end portion 20 on the body 10 to enable the device to be hammered to engage the blade in the bead initially.

Abstract: A pipe scraper for scraping the end of a plastics pipe such as a plastics gas main or water main has a framework (10) in which is journaled a helically bladed rotary cutter (14) driven by means of a lever (17). On the shaft carrying the cutter is a pinion (16) which meshes with a larger pinion (19) driving a friction surface roller (21). The cutter is held in a Reed clamp and as the lever (17) is turned it rotates the helically bladed rotary cutter so as to scrape a low angle helical scrape approximating a longitudinal scrape. At the same time the rotation of the roller (21) causes the whole framework to rotate around the surface of the pipe so as to scrape the whole end peripheral surface.

Abstract: An apparatus for simultaneously cutting and beveling plastic pipe such as water or sewer pipe is described. This apparatus includes a rotatable cutting head on which inclined and protruding cutting edges are provided to cut and bevel the pipe. The cutting head is mounted in a housing the lower surfaces of which include two convex pipe engaging regions positioned on either side of the cutting head which are contoured to contact the pipe and maintain the cutting head in proper cutting and beveling relation to the pipe when the housing is moved laterally or angularly relative to the pipe. Concave pipe engaging regions flank the convex regions to maintain the housing in contact with the pipe. The cutting bits are tapered to aid in retaining them in position in the cutting head.

Abstract: A cast iron pipe T with a minimal preset diameter is supported by a frame 1 equipped with support rollers 2, 6, the roller 2 being driven to rotate the pipe about axis X-X. Cutting is executed with a tool 16 coupled to the carrier roller 2. The rollers are disposed below the pipe, and the pipe is held against the rollers during cutting by a pressing roller 5 disposed inside the pipe end. The pressing roller is shifted downwardly in relation to the carrier roller.

Abstract: A pipe cutter comprising a guide member, a pair of supporting arms which are slidably arranged on the guide member, rotatable supporting rollers which hold a pipe to be cut on at least three points of the peripery thereof, a sliding member having a cutting tool fixed thereto, which is mounted on one of the supporting arms, and a feed screw shaft provided with a handle and screwed to the sliding member, wherein by turning the feed screw shaft, the sliding member and cutting tool can be moved in a predetermined direction, the improvement comprising a frictional clutch which is interposed between said handle and said feed screw shaft so that rotation of the handle is transmitted to the feed screw shaft only when the cutting resistance acting on the side of the feed screw shaft is smaller than a predetermined value.

Abstract: A portable coaxial cable trimmer (10) for trimming coaxial cable (12) with shielding (36), insulation (38), and a conductor (40) comprises a hollow, elongated housing (18) with a laterally disposed port (44). A first bushing (22) is attached to the end of the housing (18) for centering the cable (12). A first cutter (30) is secured in the housing (18) for trimming the insulation (38) and shielding (36) to produce a shaving (42) which is discharged from the housing (18) through a port (44). A second bushing (46), secured in the housing (18), centers the exposed conductor (40) of the trimmed cable (12). A second cutter (48) disposed in the housing (18) rounds and cuts the end of the exposed conductor (40). A device for rotating the housing, such as an air drill or an electric drill (14) can be attached to the cable trimmer (10) for rotating the housing (18) with respect to the cable (12).

Abstract: An elongated shank section is provided including mounting structure on one end of the shank section for removably mounting a rotary saw blade thereon. Coupling structure is provided on the other end of the shank section for removably coupling a source of rotary input torque to the shank section and a rotary abutment collar assembly is mounted on an intermediate portion of the shank section for rotation of the shank section relative thereto and including structure for adjustably positioning the abutment collar assembly along the shank section and releasably retaining the collar assembly in adjusted position along the shaft section against axial displacement relative thereto. An elongated handle is provided and one end of the handle defines a hand grip while the other end of the handle includes a transverse journal portion through which the shank section is rotatably received. The handle journal portion is mounted on the shank section intermediate the abutment collar assembly and the coupling structure.

Abstract: A pipe cutter comprising a pair of support arms which can move away from and come near one another along and on guide means, said support arms being provided with opposed pipe holding means having rotating support rollers to rotatably hold a pipe to be cut, therebetween, at least one of the pipe holding means being provided with a tool bit which can move in radial directions of the pipe, independently of the movement of the pipe holding means.

Abstract: A cutting device particularly adapted for cutting plastic tubing is provided and includes a first and second elongated handle member. The handle members are pivotally secured together at one end so that the handle members are movable relative to each other between an open and closed position. Semicircular and facing recesses are formed along the inner side of the handle members which correspond in shape to the outer periphery of the plastic tubing which is to be cut. Thus, with the plastic tubing between the handle members the handle members are moved to their closed position which clampingly engages the plastic tubing between the semicircular recesses. A cutting blade is pivotally secured to one of the handle members so that the cutting blade can be moved across the handle members to cut the plastic tubing.

Abstract: A shearing tool for synthetic resin tubes, in which a lower jaw is connected to the leading end of an upper handle portion, a lower handle portion is pivoted to said lower jaw at its leading end, an opening is provided in forward portion of said upper handle portion extending therefrom to the leading end of said lower jaw, an arcuate tube receiving recess is provided in the upper surface of said lower jaw, said shearing blade is pivoted in an intermediate position of the length to said upper handle portion within said opening, said shearing blade is provided at the rear and lower end with an egaging pawl, a rocking bar having notches in the upper surface is pivoted at one end to the leading end of a lower handle portion, a slot is provided in the rear portion of said shearing blade, a connection link has at one end a pin freely received within said slot and is pivoted at the other end to an intermediate position of the length of said rocking bar, a spring is provided for urging said rocking bar against said e

Abstract: A plier-type cutting tool for cutting coaxial cables without deforming the cable includes a pair of longitudinally extending members joined by a common pivot member disposed near the jaw ends of the tool. Each jaw includes a pair of opposed, obliquely related cutting edges with a third cutting edge extending between the oblique pair in concave configuration. The oblique cutting edge nearest the open end of each jaw is sharpest, and is provided for cutting the insulation and outer tube of a coaxial cable. The third cutting edge of each jaw is harder and not as sharp, and is provided for severing the inner conductor of the cable.

Abstract: Glass ampules are individual hermetically sealed units containing liquid medication. Some United States manufactured ampules and a large proportion of foreign ampules are available as unscored. In order to open and withdraw the contents of such ampules they have to be scored. This is generally done with a small steel file.The proposed invention consists of a guillotine type device wherein a small steel file is held in a slit arrangement in the lower and upper portion of the guillotine on which the ampule neck is rotated thereby scoring the ampule neck which is subsequently snapped off. The lower and upper parts of the guillotine have two (2) guide posts which permit the top portion thereof to move up and down to accomodate and score all size ampules from 1cc to 50cc inclusive.

Abstract: A shearing tool for synthetic resin tubes, in which a lower jaw is connected to the leading end of an upper handle portion, a lower handle portion is pivoted to said lower jaw at its leading end, an opening is provided in forward portion of said upper handle portion extending therefrom to the leading end of said lower jaw, an arcuate tube receiving recess is provided in the upper surface of said lower jaw, said shearing blade is pivoted in an intermediate position of the length to said upper handle portion within said opening, said shearing blade is provided at the rear and lower end with an engaging pawl, a rocking bar having notches in the upper surface is pivoted at one end to the leading end of a lower handle portion, a slot is provided in the rear portion of said shearing blade, a connection link has at one end a pin freely received within said slot and is pivoted at the other end to an intermediate position of the length of said rocking bar, a spring is provided for urging said rocking bar against said