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| Number | Title | Issue Date |
| 7536890 | Acute angle metal stock bender Apparatus for bending stock to an acute angle. A hydraulic cylinder with a ram extendable under hydraulic pressure provides the bending power. The ram automatically retracts from an extended position when hydraulic pressure is removed. One end of an apparatus suppor... | 05/26/2009 |
| 7293444 | Bending apparatus for rod-shaped and tubular workpieces A bending apparatus for rod-shaped and tubular workpieces, includes a rotatable bending mandrel with a bending groove is provided with a wrinkle smoothener, which immediately precedes the bending mandrel, and two sliding jaws. In order to change the bending directio... | 11/13/2007 |
| 7290421 | Variable curvature tube and draw die therefor A tube is bent having a curved portion with a variable radius extending between first and second ends. The curved portion includes a circular arc portion with a constant radius and a clothoid transition portion with a variable radius. The circular arc portion extend... | 11/06/2007 |
| 7254972 | Moving mold mechanism of a pipe bending machine A pipe bending machine has a moving mold mechanism, which includes two mold seats positioned one above other, and pressing wheels on each mold seat to work with corresponding bending wheels of fixed molds of the machine; the mold seats are moved by means of a rotati... | 08/14/2007 |
| 7251976 | Apparatus and method for the noncircular bending of tubes A tube bending apparatus adapted for the noncircular bending of a tube includes a modified bend die, a modified wiper die, a translatable and pivotable element and an actuator. The bend die presents a noncircular bending profile having a linearly or nonlinearly incr... | 08/07/2007 |
| 7080450 | Apparatus for terminating wire assemblies A machine for terminating wire assemblies comprising: a means for holding a wire assembly; a linear movement means for moving said means for holding between a first area and a second area; an insertion head; and, a means for dislodging; wherein, after a wire assembl... | 07/25/2006 |
| 7076982 | Concentric bore bend die and clamp insert assembly A concentric bore bend die and clamp insert assembly including a bend die and a clamp insert positioned within a recess formed in the bend die in a tube clamping area of the bend die. The clamp insert includes a curved portion matingly received within a correspondin... | 07/18/2006 |
| 7065999 | Bending roll apparatus This invention provides a bending roll apparatus capable of preventing barrel-like deformation of a pipe occurring during a roll bending work and of manufacturing a small diameter elongated pipe. In an apparatus for manufacturing a pipe by pushing rolls to a core ro... | 06/27/2006 |
| 7032422 | Pipe bending processing apparatus and pipe bending processing method A pipe bending processing apparatus includes a drawing and bending section for pressingly contacting a drawing and bending mold, a clamp mold with one end of a pipe P and performing drawing and bending processing, compression bending section for pressingly contactin... | 04/25/2006 |
| 7028521 | Pipe feeding mechanism of an automatic pipe bender A pipe feeding mechanism includes a rack, a power source, first and second planetary gears, a clutch for releaseably securing an output shaft to an input shaft in the first planetary gear, and a brake for releaseably blocking rotation of a sun gear of the first plan... | 04/18/2006 |
| 7021102 | Bending machine with bending tools on opposite sides of a tool platen A bending machine for the bending of rod-shaped and/or bar-shaped workpieces and especially of pipes incorporates a bending device (5) with bending tools (10, 11) that are provided on both sides of a tool platen (12). These bending tools (10,... | 04/04/2006 |
| 7010951 | Feeding mechanism of an automatic pipe bending machine A feeding mechanism of a pipe bending machine is equipped with several auxiliary hydraulic cylinders in addition to an original power source for providing power to feed a pipe; the auxiliary hydraulic cylinders are joined to an auxiliary fixing member at output rods... | 03/14/2006 |
| 6976378 | Bending machine A bending machine according to the present invention include: a first fixture member 22 for holding one end portion of a long work 20; a second fixture member 24 for holding the other end portion of the work 20; a rack 30 mounted o... | 12/20/2005 |
| 6170310 | Transmission shaft of a movable arm of a pipe bender A transmission shaft of a movable arm of a pipe bender comprises a main shaft, a sun gear ring and a central gear shaft. The main shaft has an upper end fixedly connected to the movable arm, and has several planet gears received therein; the planet gears ... | 01/09/2001 |
| 5937687 | Safety clamp A tube bending machine having a rotatable bend die, a pressure die, a clamp die, an actuator and a controller. A clamp assembly holds the clamp die and includes a base, a clamp die holder which is spring biased away from and slideably engageable with the ... | 08/17/1999 |
| 5927124 | Apparatus for bending and cutting tubing, and method of using same An apparatus for bending and cutting metal tubing includes a support base and a number of components attached thereto. A bend die is rotatably attached to the support base, and is pivotally movable about a pivot axis. The bend die has a tube-receiving per... | 07/27/1999 |
| 5875667 | Apparatus for forming a slightly open shell for loading of product A substantially rectangular metal blank (18) is formed about a mandrel (14) to provide a slightly open shell (28) having a pair of axially extending lips (20c, 20t) separated by a distance sufficient to permit a prewound spool (10) and its film leader or ... | 03/02/1999 |
| 5862697 | Tube bending apparatus, and methods of constructing and utilizing same A tube bending apparatus, comprising a tube holding mechanism; a first head member for substantially preventing lateral movement of a first portion of the tube; a unit for translating the tube along its longitudinal axis so as to be substantially adjacent... | 01/26/1999 |
| 5819574 | Hydraulic device for bending work and a bending device with the hydraulic device mounted thereon A hydraulic device provided with a plurality of hydraulic actuators directly connected to a hydraulic pump for control. A hydraulic pump is operable in both rotational directions when the electric motor is rotated forwards and in reverse. Ports of each hy... | 10/13/1998 |
| 5682781 | Method for controlling a pipe bending machine For the advance of the slide rail of a pipe bending machine, a hydraulic cylinder (22) is provided. The pressures (P1,P2) on both sides of the piston (23) of the cylinder (22) are detected, and from these pressures, the actual value of the advance force (... | 11/04/1997 |
| 5678441 | Bending machine for elongate workpieces A bending machine for elongate workpieces, particularly a pipe bending machine, comprises a clamping jaw (18) for clamping the workpiece (14) to be bent. During the bending process, this clamping jaw (18) is advanced by a hydraulic piston-cylinder unit (2... | 10/21/1997 |
| 5367897 | Apparatus for forming a pipe from a sheet metal plate A plate rolling apparatus, for rolling a plate to form a pipe which may be tapered, a gripper rib (14) on the mandrel (11) for receiving the edge of a flat plate. The mandrel (11) being mounted between support frame ends (24, 25) and on a single pressure ... | 11/29/1994 |
| 5343725 | Tube bending apparatus and method An improved tube rotary draw bending apparatus for bending a tube having a bend die around which a bend in the tube is formed, a pressure die and means for maintaining a pre-programmed frictional profile of the interaction of the tube with the pressure di... | 09/06/1994 |
| 5301530 | Tube bending apparatus Tube bending apparatus comprising a lower support carrying a mandrel having a bending groove providing a bend axis, and an upper support mounted on the lower support for rotation about the bend axis and carrying a forming member for urging a tube between ... | 04/12/1994 |
| 5263350 | Multi-function pipe bending machine A multi-function pipe bending machine (1) comprising a base structure (2), a first slide (8) slidably engaged to the base structure (2) along a first traverse direction, a second slide (11) slidably engaged to the first slide (8) along a second traverse d... | 11/23/1993 |
| 5245849 | Apparatus for forming a pipe from a sheet metal plate A plate rolling apparatus, for rolling a plate to form a pipe which may be tapered, a gripper rib on the mandrel for receiving the edge of a flat plate. The mandrel being mounted between support frame ends and on a single pressure roller mounted beneath t... | 09/21/1993 |
| 5022249 | Portable manually-controlled three-speed pipe-bending machine Portable manually-controlled pipe-bending machine designed for operation at three different speeds, consisting of a boxlike main body, which in its simplest form contains two gear assemblies i.e.: a speed reducer with cooperating gears mounted on three pa... | 06/11/1991 |
| 4941338 | Device for cold forming of ferrous and non-ferrous metal sections In the process for the cold forming of ferrous and nonferrous metal sections, pretensioning is applied to the initially essentially straight metal section, which is clamped at both ends. Next, the tensioned metal section is bent in a rotating bending tool... | 07/17/1990 |
| 4546632 | Portable conduit bending apparatus A portable electric driven conduit bender which accommodates rigid, IMC and thinwall conduit of various sizes in a single setup includes a rotatable, cone-shaped bending shoe, and a roller assembly for supporting conduit during bending. The bending shoe h... | 10/15/1985 |
| 4318289 | Pipe cutting method and apparatus Material is drawn from a roll of flat stock, passed through a pipe forming machine, and welded to provide a continuous length of pipe which is stored in a variable size loop. Pipe is withdrawn from the loop by means of a series of pipe straightening and f... | 03/09/1982 |
| 4269054 | Bending method A rotary pipe bending machine employs a single hydraulic motor to drive clamp and pressure dies toward the bend die and to rotate the bend and clamp dies. The motor piston is connected via a chain to drive a clamp die carrier toward a rotatably mounted be... | 05/26/1981 |
| 4201073 | Reaction bender for pipe A rotary pipe bending machine employs a single hydraulic motor to drive clamp and pressure dies toward the bend die and to rotate the bend and clamp dies. The motor piston is connected via a chain to drive a clamp die carrier toward a rotatably mounted be... | 05/06/1980 |
| 4178788 | Adjustable clamp die In a rotary pipe bending machine in which the pipe is clamped against a rotary bend die by a clamp die and the two dies are rotated together while a rear section of the pipe is pressed by a pressure die, the clamp die is adjustably mounted for motion tang... | 12/18/1979 |
| 4167865 | Hand-operated bender apparatus A hand-operated bender apparatus for forming relatively thin metal stock into parts having predetermined shapes, comprising a base, a clamp on the base for holding portions of the metal stock to be shaped, and a elongate handle which is pivotally carried ... | 09/18/1979 |
| 4130004 | Method for bending tubes A tube bend is started by compresssion bending and continued by draw bending. Conventional bending equipment is employed with one die slightly modified so that normal machine operation causes the pressure die to initially operate in a compression bending ... | 12/19/1978 |
| 4126030 | Retractable pressure die In a machine for draw bending pipe, a long pressure die that moves with the pipe during the bend is provided with a retractable rear section. Both sections are used for a large degree of bend but when a bend of lesser degree is made near the end of the pi... | 11/21/1978 |
| 4112728 | Device for bending pipes The device bends pipes into a serpentine pipe bank having right-hand and left-hand bends, with the pipe being held, during the bending operation, in a bending rail and the pipe end to be bent being clamped in a bending form. The bending rail and the bendi... | 09/12/1978 |
| 4078411 | Floating clamp die A clamp die for urging a tube against a rotatable bend die is mounted for limited translational and rotational motion so that its tube receiving cavity will accommodate and receive a portion of a bend previously made in the tube. Thus, one bend may be sta... | 03/14/1978 |
| 4063441 | Apparatus for bending tubes A tube bend is started by compression bending and continued by draw bending. Conventional bending equipment is employed with one die slightly modified so that normal machine operation causes the pressure die to initially operate in a compression bending m... | 12/20/1977 |
| 4003233 | Bending and straightening mechanism for mine roof bolts A method and apparatus for successively bending and straightening a bolt shank and the like for insertion into a bolt hole is characterized by a readily transportable compact device having inner and outer spaced cooperating rollers engageable with diametr... | 01/18/1977 |
