Class 266/70 - Circle cutter

Subclass of Class 266 - Metallurgical apparatus
Definition: Device provided with means constraining the cutting means
No. of patents: 38
Last issue date: 05/23/2006

Number	Title	Issue Date
7049541	Cutting guide for plasma torch A guide that is used in conjunction with a plasma cutting torch includes a main circular ring having a small circular ring mounted on the outer periphery thereof. The small ring includes a bearing assembly and accommodates the plasma cutting torch. A guide bolt is m...	05/23/2006
6391248	Circle cutting attachment for torch A circle cutting attachment device for a cutting torch. A torch tip sleeve is attached to the front end of the device and has a cylindrical opening passing therethrough that has a longitudinal axis that is angled forwardly through the body of the torch ti...	05/21/2002
6113845	Versatile cutting torch system A versatile torch assembly is provided including a base and a mounting arm coupled to the base. Also included is a plate rotatably mounted with respect to the mounting arm. A torch is mounted on the plate for cutting purposes....	09/05/2000
6103184	Hand-held torch circle cutter A circle cutting attachment for supporting a hand-held torch for forming a circular opening in a metal workpiece....	08/15/2000
6073324	Apparatus for cutting sheet metal disc from and welding sheet metal disc to sheet metal An apparatus for cutting sheet metal discs (31) from and welding sheet metal discs (31), or other smooth-contoured sheet metal pieces, to a sheet metal strip (20) or other workpiece, particularly an endless sheet metal strip, e.g., in a double-strip press...	06/13/2000
6022506	Device for cutting circular openings in pipe, vessels, and flat material A circle cutting device that is particularly useful for cutting openings through pipe and round vessels and may also be utilized for cutting circular openings through flat material. The device utilizes a conventional oxygen acetylene cutting torch or plas...	02/08/2000
5804133	Motorized cutting torch attachment A cutting torch drive attachment which is easily attachable to an existing cutting torch providing a self contained battery powered motorized cutting torch drive attachment facilitating consistent torch speed and tip to work distance resulting in smooth s...	09/08/1998
5575971	Circle circumscriber and cutter of steel plates A double-pivot circle-cutter including a pivot member pivotally mounted on a support arm and having a sliding beam slidably extending therethrough. The pivot member is vertically adjustable, and its axis of pivot extends through the support arm. The slidi...	11/19/1996
5511765	Cutting torch attachment for facilitating cutting circular holes An attachment used with a cutting torch having a plurality of tubes extending between a handle portion and a head portion of the torch facilitates cutting of circular holes with the torch. The attachment includes a C-shaped support member having spaced bo...	04/30/1996
5360201	Hole and circle torch cutting attachment A hole and circle cutting attachment for use with a cutting torch includes an elongated rigid rod, an elongated pointer and elements for adjustably mounting the pointer at one end portion of the rod and extending in a generally transverse orientation rela...	11/01/1994
5040299	Base for cutting a circular plate with a gas burner A base for cutting circular plate with a gas burner comprising a base body to keep itself immovable on the iron plate to be cut by means of magnetism, a rotatable shaft inserting in the base body and combining with and statilizing an arm having a holed ba...	08/20/1991
5006687	Method for cutting steel pipe piles A method of cutting a steel pipe or/and junction joints in form of a steel pipe pile or interlocked steel pipe pile used, for example, in formation of an underwater foundation support, after it is completed. The method is executed in accordance with a non...	04/09/1991
4778155	Plasma arc hole cutter A plasma arc hole cutting device is disclosed for removing selected portions of metal workpieces, such as stainless steel, for testing or marking purposes. A plasma torch is connected at one end to a rotatable cam element and spaced a distance from the ce...	10/18/1988
4695041	Cutting torch holder The invention is for an oxy cutting torch holder having a frame with a pair of vertically adjustible posts with bearing wheels at their lower ends. A nozzle-receiving passageway is disposed in the frame with a novel nozzle retaining device. Provision is m...	09/22/1987
4621792	Cutting tool attachment An attachment for a cutting torch includes a support member for supporting a cutting head of a cutting torch and a guide member in the form of a travelling wheel assembly for guiding the cutting head at a suitable height for operation. An offset pivot rod...	11/11/1986
4606528	Motorized hand torch with improved brake mechanism A motorized hand torch with an improved brake mechanism is provided. The brake mechanism includes a brake lever which is manually actuable to either a locked or an unlocked position. The brake lever, in turn, has a cam portion thereon which moves a pivota...	08/19/1986
4593888	Adjustable pattern An adjustable pattern adapted to be utilized with a cutting machine having a drive motor with a drive motor output shaft and a cutting element associated with the drive motor so the cutting element follows a cutting path generally following movement of th...	06/10/1986
4540320	Self generating profile generator A method and apparatus for cutting holes of circular or other shape by first cutting at the center of the proposed hole, then cutting to the circumference and following the shape desired. A tool that accomplishes these functions is described which include...	09/10/1985
4469311	Motorized hand torch A semi-automatic, motorized hand torch, or gas cutting machine, that is capable of being freely operated with one hand and characterized by device head having a cutting torch tip, respective conduit means for supplying to the tip preheat oxygen, cutting o...	09/04/1984
4456228	Radius attachment for automated welding and cutting torch carriages A radius attachment is provided for use with a conventional welding or cutting torch carriage incorporating a segment of the guide rail carrying a drive means and balancing means, the drive means being driven by the drive of the torch carriage and a conne...	06/26/1984
4455015	Steering apparatus for an autogenous cutting torch A steering apparatus for an autogenous cutting torch for cutting holes of desired shape in flat or curved sheet walls, such as in the wall of a pipe. The steering apparatus comprises a holder arm for an autogenous cutting torch and means for guiding the h...	06/19/1984
4448340	Apparatus for replacing bolster rings The disclosure concerns a procedure for replacing a worn bolster ring on a freight car truck bolster which utilizes a motorized circle cutting and welding machine which rests upon the bolster and is centered by supporting structure positioned by locating ...	05/15/1984
4434015	Device and method for cutting circular piece parts A device for cutting circular piece parts of various diameters comprising a shaft having a central axis and a cutting element mounted on a rack at a random radius from the axis. The rack supports the cutting element for changing the position of the cuttin...	02/28/1984
4411411	Cutting torch guide attachment An apparatus for attachment to a conventional welding torch which provides a support for the welding torch tip which is to be used in conjunction with a template for making smoothly contoured cuts within a workpiece. The apparatus includes a collar which ...	10/25/1983
4411410	Apparatus for cutting openings in pipes A mechanism is provided for torch cutting openings in pipes wherein the openings are dimensioned according to the size of other pipes to be connected by welding at the opening. The mechanism comprises a frame structure which is adapted to be secured in im...	10/25/1983
4372538	Metal cutting machine with cut piece pickup and transport magnets A metal cutting machine has a plurality of tool carrying cutting heads mounted for movement along a bridge which in turn is mounted on rails or the like for movement transverse to the direction of head movement. Controls are provided for selective movemen...	02/08/1983
4330110	Apparatus and method for cutting holes in steel plates Single or ganged cutting torches for steel plates preheat the center of each hole to be cut prior to any displacement of the torches. On completion of the preheating, the torches are laterally repositioned in correspondence with the common radius of the h...	05/18/1982
4330076	Method for replacing bolster rings The disclosure concerns a procedure for replacing a worn bolster ring on a freight car truck bolster which utilizes a motorized circle cutting and welding machine which rests upon the bolster and is centered by supporting structure positioned by locating ...	05/18/1982
4319933	Bridge and die attachment for cutting torches An accessory for facilitating the accurate cutting of holes with a cutting torch. A die is attached to the workpiece by legs and presents a die opening which controls the size and shape of the hole. A bridge piece fits against the die and maintains the cu...	03/16/1982
4283043	Cutting torch attachment A system for using a cutting torch for making accurate curved, straight and beveled cuts. A supporting and guiding device is attached to cutting torches, which may be of various sizes and shapes, and includes an elongated bar having a ring and opposed set...	08/11/1981
4264058	Truck bolster ring renewal system A mechanized truck bolster ring renewal system is described for cutting the worn bolster ring from a truck bolster and for welding a new bolster ring onto the truck bolster. A bolster clamp mechanism is pivotally mounted on a frame and includes means for ...	04/28/1981
4256288	Hole cutting apparatus In one exemplar embodiment, a portable hole cutting apparatus for cutting circular bolt holes in metal plate and the like is disclosed having a base, and a generally upright frame to which is attached a yoke carrying a pair of vertically spaced-apart bear...	03/17/1981
4157814	Cutting attachment for welding torches Disclosed herein is an apparatus for attachment to a conventional welding torch which provides a support and a template for cutting portions of arcs or full arcs. The apparatus includes a nesting mechanism and constraint for retaining the torch cutting as...	06/12/1979
4081179	Circle cutter A circle cutting apparatus particularly adaptable for the cutting of circles and arcs in metal plates and the like with a cutting torch. The device comprises a circular platform which is attached to the plate to be cut and a torch or cutting implement whi...	03/28/1978
4053145	Cutting torch guide A guide for a cutting torch providing means for effecting circular cutouts in large vessels or large diameter pipe without the need of a lay-out other than fixing a working point and providing multiple adjustments so that cuts may be made of the desired d...	10/11/1977
4021025	Circle cutter A circle cutting apparatus particularly adaptable for the cutting of circles and arcs in metal plates and the like with a cutting torch. The device comprises a circular platform which is attached to the plate to be cut and a torch or cutting implement whi...	05/03/1977
3944194	Metal cutting tool guide An improved device for guiding a cutting torch on a metal surface which metal is a magnet attracting material comprises a magnetized base member and one or more guide members secured to the base member which guide members act as a template having a shaped...	03/16/1976
3941358	Cutting torch guide A device that may be removably secured to a steel plate to guide a cutting torch in a circular path of a desired radius to form an opening in the plate. The device includes a cutting torch engageable socket, which socket is rotatably supported from a radi...	03/02/1976

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Class 266/70 - Circle cutter