Abstract: A pipe bending machine having two bending heads is endowed with two bending heads (9, 10), that each can move in the initial direction of pipe to be bent (12), each also being endowed with a bending tool that operates in a bending plane whose orientation can be modified. At least one of the bending heads (9, 10) can also move in a plane perpendicular to the initial direction of pipe (12) and holds clamping mechanism (27, 29) of the pipe, offset from the longitudinal axis of the head. In this way the head can be moved away from initial axis (11) of the pipe, the associated clamping mechanism (27, 29) in this case moving into such axis and being able to hold pipe (12) temporarily therein. This arrangement makes it possible to execute very closely-spaced bends in the median area of the pipe.

Abstract: A method and apparatus is disclosed for the manufacture of J-shaped display hooks with balled ends in a single manufacturing operation, without requiring separate handling of the display hook for the bending and ball-forming operations. A continuous length of wire is advanced incrementally and gripped tightly adjacent its forward end. The wire is severed by a cutting and forming bar, which also bends the base portion of the wire at right angles to the main axis of the wire. While the wire remains tightly gripped at its forward end, and continue to be supported adjacent its base by the cutting and forming bar, a ball-forming die is advanced against a projecting forward end of the wire, upsetting the wire end and forming an enlarged end of generally spherical configuration. Immediately thereafter, the wire is released at its forward end, and a rotary plate is actuated, causing a bend-forming element to travel through a generally circular path concentric to a cylindrical forming drum.

Abstract: Bending assembly with satellite to bend at least one end of solid or hollow rods, which can be employed by itself or in cooperation with other assemblies, such as shearing and/or straightening assemblies, and comprises a central body (14) of a substantially cylindrical shape with an upper work platform (40) on which are positioned a mechanism (12) for linear feed of a rod (21) together with two outlets and clamping mechanisms (13), and comprises also a satellite (15) of a substantially annular shape with a bending unit (11) comprising a bending roller (29) able to rotate about an abutment roller (30), the bending unit (11) and the outlets of the feeder mechanism (12) being able to cooperate with each other and to be positioned reciprocally by rotation of the satellite (15) about the central body (14).

Abstract: This invention has concentrated on the construction of an extra bending mechanism which by appearing at the right moment, creates wire/rod bends always in relation with the above mentioned line x--x, but within other planes E2, also containing line x--x 15 but distinctly different than plane E1. In this manner it is possible to achieve the construction of wire shapes in three dimensions.

Abstract: Device for the controlled and independent rocking of a bending platform and straightening platform in bending-shaping machines having an independent bending platform (13) located downstream of a straightening platform (11), in which machines the straightening platform (11) has a preferred inclination, whereas the bending platform (13) has an inclination depending on the product being processed at that time, the axis of rotation (17) for adjustment of the inclination of the bending platform (13) being positioned below and at a distance "x" from the axis of the inlet (16) of rods (18) onto the bending platform (13), in which device the straightening platform (11) is supported on a parallelogram system (20) having the axis of lower pivots (26) distant by the value "x" from the axis of upper pivots (25), the axis of the lower pivots (26) coinciding with the axis (17) of rotation of the bending platform (13), whereas the axis of upper pivots (25) is kept so as to coincide substantially with the axis of the inlet (

Abstract: The present invention relates to a bending device for small-diameter pipes of various shapes usable as an oil, air or fuel supply path to be employed in automobiles and other various kinds of machines and equipment.The bending device of the present invention includes a frame, a rotary actuator having a rotary arm, a pressure roll supported by a support erected on the rotary arm and passing through the frame and a plate-like jig fixed to the upper surface of the frame and provided with a shaping roll opposing the pressure roll. The plate-like jig is light in weight and replaceable with another jig so as to meet various pipe bending shapes so that the time and labor required for bending the pipe to different shapes are sharply saved thereby improving productivity.

Abstract: A small-diameter metallic conduit bending machine includes a stationary frame. The stationary frame made of bar stock or pipe stock is shaped so as to substantially conform to a finished metallic conduit. The stationary frame includes a bending section which has in its lengthwise direction a curvature smaller than the bend radius of the metallic conduit and in its widthwise direction a guide surface substantially orthogonal to the bend plane of the metallic conduit. A bending member whose outer peripheral surface faces the guide surface is disposed movably toward the stationary frame so that the metallic conduit can be bent so as to lie along the guide surface. The bending member is moved by an actuator when the actuator is in its pulling stroke.

Abstract: Movable shears and a method for the automatic or non-automatic bending of the trailing end of bars in bending-shaping machines having a bending assembly located downstream of a shears (24) and of a bar feeder unit are disclosed. The bars may be already straightened or already straightened and sheared to size or may require straightening and the bar (29), after the required bends have been applied to its leading end (T), is fed forwards with a movement of distancing of its leading end (T) by an appreciable length at least partly by the feeder unit. When this forward length of feed has been completed, the bar (29) is sheared by the shears (24), thus creating a trailing end (C) of the residual bar (129). The movable shears (24) are able to slide on a longitudinal slide block (45) which is positioned as required in a direction lengthwise to the bar (29) so as to determine the length of the trailing end (C) of the residual bar (129) in relation to the bending assembly (35).

Abstract: A straightening-bending plant or apparatus utilizing a universal straightening-bending machine, preferably associable with wire stock feeding mechanism, in which the straightening-bending machine comprises in progressive order, on a pivotable working plane an hinging horizontal axis (Y--Y);an advancing and straightening mechanism with opposed rolls to straighten and advance in longitudinal path the stock laying on the working plane (B), associated/able with an eventual guiding mechanism;a cutting mechanism, laying on the same work plane (B), for cutting the stock material;a bending mechanism for bending said stock material by means of a central anvil mechanism and bending nib, (7) rotating around; characterized in that the respective working plane pivoting mechanism is conceived to orient the working plane;from a first approximately horizontal position (.beta..degree.=90.degree.)to a second positive inclined position (0.degree.<.beta..degree.<90.degree.

Abstract: Method and machine to bend the trailing end of bars, which is to be carried out automatically or otherwise in bending-shaping machines with a working platform (22) that can be positioned as desired in relation to the horizontal and with a bending assembly located downstream of a feeding-straightening assembly for bars unwound from a reel, whereby after the required bends have been made in the leading end (T) of the bar (29), the bar (29) is fed forwards by an appreciable length at least partially by the feeding assembly with a movement of distancing of the leading end (T) and, this length of feed having been completed, the bar (29) is sheared by a shears (24) so as to create a trailing end (C) of the residual bar (129) when the trailing end (C) has been defined, the residual bar (129) is moved axially by an auxiliary drawing unit (10) located downstream of a bending assembly (35) and suitable to take up a first working position and a second retracted position to free a working platform.

Abstract: Rocker bending unit (10) of a type retractable below a working platform (22) of a bending-shaping machine for bars (29), the unit (10) comprising a bending disk (11) provided with a clockwise and anticlockwise rotation of a bending pin (13) positioned out-of-alignment in relation to the axis of rotation, a contrast roller or pin (12) which may be interchangeable being included and coaxial with the axis of rotation, in which unit (10) the bending disk (11) cooperates with and is supported on a base (18) pivoted so as to be able to rock with a rocker pivot (21) on a frame (28) of the machine downstream of the bending unit (10), the rocking direction lying on a plane substantially at a right angle to the working platform (22) and to the axis of feed of the bars (29), the axis of the rocker pivot (21) being substantially parallel to the working platform (22) and in the geometric neighborhood thereof, the unit (10) being fitted on a slider (27) supported by the base (18) and able to move thereon (18) in a directio

Abstract: A small-diameter metallic conduit bending machine comprises a stationary frame with a guide surface, a bending member for pressing a metallic conduit against the stationary frame, and an actuator for moving the bending member via a lever. One end of the lever supporting the bending member is pivoted to the stationary frame at a position lying substantially on the axial center line of the metallic conduit within a central portion of a bend section where the metallic conduit is bent so as to lie along the guide surface of the stationary frame. Thus, the metallic conduit can be readily inserted between the guide surface and the bending member, and two successive bending works can be completed through one action.

Abstract: A small-diameter metallic conduit bending machine includes a stationary frame which is shaped so as to substantially conform to a finished metallic conduit. A bending member is provided movably toward the stationary frame from thereoutside to bend a metallic conduit. To prevent the bending member from interfering with the metallic conduit which is moving as the result of the bending process of a preceding stage, an actuator is provided to remove the bending member from the moving area of the metallic conduit. That is, the binding member is made movable toward the stationary frame and retractable from the moving area of the metallic conduit.

Abstract: An apparatus for bending an elongated material in any direction includes a chucking unit, an arm robot having at least three swiveling arm segments, a bending head provided on a free end of the arm segment and a moving device for moving the robot along a line parallel to the chucked material. The bending head is moved by the arm robot perpendicularly toward and away from the material. This facilitates the changing of the bending die to one having a different bending radius to execute bending using various radii. Moreover, since the chucking unit includes an avoiding mechanism for avoiding interference with the arm robot, bending near the center part of the material is also possible.

Abstract: A small-diameter metallic conduit bending machine comprises a stationary frame segment and a movable or separated frame segment, each including a bending station. Where a metallic conduit seems to interfere with the movable frame segment kept in its normal position when the metallic conduit is bent by a bending member, the movable frame segment is displaced to avoid interference, a subsequent bending work is performed beforehand, and then the subject bending work is performed after the movable frame segment is returned to its normal position.

Abstract: For the production of arc elements of disc form a metal strip of wedge form is rolled on edge around an axis of curvature, the metal strip side faces, which converge on one another in wedge form, being rendered parallel.The invention relates to a method for the production of a part-circular arc element the cross-sectional area of which--considered in a section containing the axis of curvature--possesses a, preferably longer, extent in the radial direction and a, preferably shorter, extent in the axial direction and the side faces of which, which are perpendicular to the axis of curvature, are substantially plane-parallel, especially of a check flange for a plain bearing shell.

Abstract: A machine for bending tubular or rod stock into complex, compound shapes has three driven synchronized rollers together with a single shaping roller also synchronously driven. The shaping roller is mounted on an arm pivotally mounted about the shaft of the downstream one of the three rollers and its movements are precisely controlled and effected by a single hydraulic cylinder. The control valve for the valve is entirely operated by a signal supplied from a omputer which has been pre-programmed to effect the formation of the particular shape or shapes desired.

Abstract: A metal tubing bender forms arcs into metal tubing by engaging a swing-arm mounted roller against a clamped tubing section and rotating the roller through an arc necessary to place the desired degrees of bend into the tubing. The tubing is clamped against a forming plate that is provided with a peripheral groove of uniform radius and serves as a die for the forming operation. The forming plate stands out from a mounting plate and the roller swing arm fits between the mounting plate and the forming plate for stability of operation.

Abstract: A bending machine comprises a support to which first and second spaced cooperating bending devices are displaceably mounted. Each of the bending devices have first and second spaced cooperating bending components and the components of the first and second bending devices define a first axis extending between the bending devices and further define second and third axes extending generally transverse to the first axis and about which a length to be bent may pivot and each of the second and third axes are disposed between the components of one of the bending devices. A drive mechanism is operably associated with at least one of the components of each of the bending devices for causing displacement thereof. A guide system is operably associated with the support and with each of the bending devices so that displacement of the bending components by the drive system causes the bending components to move relative to the first axis and to engage the length to be bent extending between the devices.

Abstract: A bending machine comprises a support to which first and second spaced cooperating bending devices are displaceably mounted. Each of the bending devices comprises first and second spaced cooperating bending components and the components of the first and second bending devices define a first axis extending between the bending devices and further define second and third axes extending generally transverse to the first axis and about which a length to be bent may pivot and each of the second and third axes are disposed between the components of one of the bending devices. A drive mechanism is operably associated with at least one of the components of each of the bending devices for causing displacement thereof. A guide system is operably associated with the support and with each of the bending devices so that displacement of the bending components by the drive system causes the bending components to move relative to the first axis and to engage the length to be bent extending between the devices.

Abstract: A pipe bender assembly comprising a pipe bender and a pipe clamp (36) cooperable therewith, the pipe bender including a body (10), a main die (12) forming part of, or mounted on the body, the main die having at least one part annular groove on its periphery. A circular shaping die (16) having an annular groove on its periphery and rotatable about its own axis, which is parallel to the axis of the main die, is supported on a mounting (16) so that it is rotatable about the axis of the main die. The mounting (16) is drivable by a reduction gear (20,22,24,26). An abutment surface (32) is formed on the body of the pipe bender and the pipe clamp has a pipe receiving bore therethrough and an outer surface including at least two faces (50,58) each selectively engageable accurately with the abutment surface to position temporarily the pipe clamp with respect to the pipe bender, the faces (50,58) extending at an angle to one another when viewed along the axis of the pipe receiving bore.

Abstract: A bending machine having a rotary bending head to which fluid pressure is transmitted via a fluid flow or fluid pressure transmission device comprising a fixed block and a rotary shaft mounted in relation to the fixed block so as to be rotatable relative thereto. The fixed block has at least one passageway through it extending to the rotary shaft, and the rotary shaft has at least one annular groove in registration with the fixed block passageway and at least one axially extending passageway in communication with the annular groove. As a result, the axial passageway is in communication with the fixed block passageway independently of the angular position of the rotary shaft relative to the fixed block.

Abstract: A bending device for use in an automatic pipe bender comprises a chuck unit for gripping a straight pipe, a bending unit, and a movable unit. The movable unit can move forward and backward longitudinally of the pipe placed in position. A rotary member is mounted to the movable unit so as to be rotatable within a range of 360.degree. in a direction perpendicular to the axis of the pipe. The bending unit is mounted to the rotary member so that the bending unit rotates with the rotary member.

Abstract: A portable pipe-bending machine that makes uniform and consistent bends of varying degree curvature in pipes is disclosed. The pipe-bending machine has a stabilizing platform to resist counter-bending forces and interchangeable elements to accommodate pipes of a different thicknesses. The pipe is forced between a solid mandrel and a movable semi-sleeve in a rotation yoke and the yoke is moved at a pre-set number of degrees, thereby putting the desired bend in the pipe.

Abstract: The invention relates to a bending apparatus for bending a rod-shaped or ribbon-shaped material, comprising a bending station disposed in a work plane and including at least one bending core or pair of bending cores mounted for displacement perpendicular to the work plane, and at least one rotary body carrying a bending finger mounted for rotation about the bending core and for displacement perpendicular to the work plane. With known bending apparatus it is scarcely possible to vary the bending mode, or the bending radius, respectively, without time-consuming adaptation of the bending station. Such adaptation may be required several times for a single workpiece. In accordance with the invention, the bending core or pair of bending cores is mounted, together with at least one further bending core or pair of bending cores for selectively employ in a bending operation, in a turret head mounted above the work plane for rotation at least to several operating positions.

Abstract: In order to form materials (18) in a cold state automatically and reproduceably a bending machine (10) is proposed, comprising at least two bending carriages (14, 16), which interact with the material so that one of the bending carriages (14 or 16) constantly holds the material (18) immoveable when the other bending carriage (16 or 14) is bending the material (12) or is being moved along it.

Abstract: A slit fin heat exchanger is formed by wrapping slit fin tubing into a flat coil having two spaced rows of tubing. The flat coil is located on mandrels which are rotatable about spaced parallel axes with the mandrels and axes initially being in the same plane. The mandrels are rotated about their axes in opposite directions which shifts the plane in which the coil is located. The shifting of the plane of the coil moves a portion of a first row of the coil into contact with a planar portion of a platen and the second row of the coil into a nesting relationship with the portion of the first row which is in contact with the planar portion of the platen. Continued rotation of the mandrels causes folding of the portions of the coil which extends the area of nesting. The folding takes place through up to 120.degree. and the ends of the first row of the coil contacts a portion of the platen causing the formation of a knob at the end of each coil.

Abstract: Apparatus for bending a light gauge, profiled, metal panel to a curved shape, including an anvil mounted on a frame and having a part-annular surface, an arm mounted for pivotal movement about the center of curvature of the part-annular surface, a roller carried by the arm at a position spaced from the center and rotatable about its own axis, so that it can roll in an arc adjacent the annular surface, a mandrel carried by the arm for movement therewith at a location between the roller and surface, the mandrel comprising a plurality of blocks each having its length parallel to the roller axis, the blocks being juxtaposed in side-by-side relation and each shaped to conform to the profile of the panel to be bent, and at least one flexible element passing through all of the blocks and loosely holding them in juxtaposed relation, but allowing slight relative movement whereby, in use, with the mandrel engaged in the profile of a panel to be bent, the mandrel acts as a shape retaining member for the profiled panel,

Abstract: A conductor bundle edge-bending tool is disclosed. The apparatus is designed to bend a conductor bundle of a coil of a dynamoelectric generator along its edge. The apparatus is easy to use and prevents lateral deformation of the conductor bundle and provides a large mechanical advantage.

Abstract: A wire or strip bending machine has bending tools (1,2), each of which can act as an active tool or mandrel, mounted on an arm (3) which is slidable in a slot (11) in a rotatable disc (10). The disc is rotatable via gearing (13,14) to rotate one of the tools about the other, to bend material between the tools.

Abstract: Apparatus for effectively and efficiently cutting and bending rods, used for instance in lintels, footers, and slabs, comprising a portable workbench having suitably secured on the table thereof bending and cutting assemblies, hydraulic power cylinders for actuating the assemblies, and suitable controls for ease of operation of the assemblies. The cutting assembly includes a stationary cutter disposed in a vertical position on the table top adapted to be engaged by a vertical rotatably moved cutter for the shearing of rods with the rods disposed in horizontal position on the table top. The bending assembly includes a pair of vertically mounted spaced apart cylindrical members or posts with one of said members rotatably mounted in the table top such that rotation of said one member with a rod disposed between said member is effective to bend the rod.

Abstract: A method and apparatus for imparting a three-dimensionally curved configuration to a straight elongated element wherein one end of the element is removably supported with its axis coincident with a reference axis. The element is partially pre-bent away from the reference axis into conformity with a two-dimensional first guide path. Thereafter, the pre-bent element is bent into conformity with a three-dimensional helical second guide path.

Abstract: A new and useful device for producing bends in metal tubing by containing the tubing in a form and rotating the form against a fixed shoe thereby bending and swagging the tubing to the shape of the form. The form being rotated by a ratchet and pawl mechanism which translates the linear motion of levers and linkage produced by the gripping force of the hand into circular motion of the form.

Abstract: A tube bender construction wherein the forming member is swingably mounted to the form wheel to be adjustable toward and from the form wheel groove to accommodate variations in tube diameter and normal wear of portions of the tube bender during the life thereof. The form wheel defines a concave force transfer surface having an improved engagement with the tube to be bent so as to effectively improve maintained tube roundness for effectively minimized stress formation in the bent tube.

Abstract: A method and apparatus for forming rings that is particularly suited for forming plow rings from elongated lengths of stock having irregular cross sectional shape. A length of stock (12) is positioned against a mandrel (20), the end of the stock being pre-bent from a previous bending operation, with the free end of the stock extending beyond the mandrel. A movable bending element (24) is brought into contact with the stock opposite the point of contact with the mandrel, and advanced around the mandrel partially bending the stock. A clamp (82) clamps the partially bent stock against the mandrel and a cutter (98) then cuts the stock, leaving a partial bend in the newly formed free end of the stock, the cut portion of stock being clamped to the mandrel. The length of stock is moved away from the mandrel so that the bending of the cut portion around the mandrel can be completed.

Abstract: A bending device for metal pipe with and without plastic jacketing has a short cylindrical segment including a circumferential groove which determines the bending radius of the pipe to be bent and a support for holding the pipe to be bent tangentially with respect to the groove. A lever is mounted for concentric pivotable movement about the segment and a pressing block is mounted on the lever for pivotal movement about an axis parallel to the segment axis. The pressing block has a working surface which has an approximately semicircular, concave cross section in a plane disposed parallel to the pivot axis of the pressing block and the segment axis and a concave cross section in a plane disposed perpendicular to those axes.

Abstract: Apparatus for producing a serpentine tube by bending a straight tube including a plurality of dies each having an arcuate surface, the dies being arranged alternately on opposite sides of the straight tube and movable in a direction toward the center axis of the straight tube and at the same time in a direction intersecting the center axis of the straight tube. During a bending operation, the dies are spaced apart from one another in a manner to impart to the straight tube and the serpentine tube such a dimensional relationship that no excess material is produced in the tube. Each die forms a set with two wings, the two wings being operative to force the straight tube against the arcuate surface of the associated die while rotatingly moving for a circumferential extent of 90 degrees each along the arcuate surface of the die. Each set of die and wings is mounted on one of a plurality of front-to-rear ball screws supported for movement by a plurality of left-to-right ball screws.

Abstract: An arc-like formed product, such as bearing metal, is manufactured from a strip of sheet metal, by introducing the metal strip in a tangential direction to a cylindrical forming surface of a die, bending and rolling the metal strip along the forming surface of the die into an arc shape, cutting both ends of the formed metal strip at both ends of the forming surface of the die while pressing the metal strip against the forming surface of the die in a range of at least 1/20 to 1/3 of its length, transferring the formed strip piece of metal into a coining die and coining the same.

Abstract: A method for constant-measure feed of rod materials comprising a process for bringing a feed member fixed to conveyor into contact with the rear ends of rod materials and conveying the rod materials together with the feed member along guide by the conveyor, a process for causing the forward ends of the rod materials to abut against a movable stopper disposed in a normal position and further conveying the rod materials while holding the rod materials between the stopper and the feed member, and a process for sensing a movement of the stopper for a given distance from the normal position and stopping the conveying operation of the conveyor.

Abstract: Part of a red-hot metal rod between the ends of the rod is supported and first and second bending members are displaced, preferably simultaneously, to bend parts of the rod on both sides of said part around respective forming surfaces to produce two U-bends substantially without movement of said part. Then the two end portions of the rod point in substantially opposite directions and overlap without touching one another. Preferably the rod bent in this way, still red-hot, proceeds to another location where it is bent further to produce a railway rail-fastening clip of the desired final shape.

Abstract: A manually operated wire or cable bending apparatus comprising a support assembly for supporting a forming die at one end thereof. A drum assembly comprising a pair of spaced apart interconnected weighted members is mounted on the support assembly, one such weighted member provided with graduations thereon from 0.degree. to 360.degree. on one end face thereof, whereas the other said weighted member having a means for swivelly securing a measuring tape which is adjustably mounted on said support assembly. The forming die comprises a forming block pivotally mounted on a rotatable handle, the forming block cooperating with a fixed grooved forming die to bend a wire or cable positioned between the said forming block and said grooved forming a die when a handle to which the said forming block is pivotally mounted thereon is rotated counterclockwise.

Abstract: A generally circular die is mounted on a rotatable shaft in non-rotatable relation thereto. The periphery of the die is formed by a plurality of separate arcuate (circular) portions curved along a path equal in radius to the desired radius of curvature of the bend in the different size pipes being bent. Each of the arcuate portions includes a hemispherical recess having a diameter differing from the others and substantially equal to the outer diameter of the tube being bent in that particular arcuate portion. A force transmitting member is secured by an arm to the aforementioned vertical shaft and is rotatable therewith. The surface of the force transmitting member is provided with a plurality of separate arcuate portions, each having a hemispherical recess therein corresponding to those on the corresponding portion on the die face opposite.

Abstract: A stirrup machine for bending metallic stock material such as bars, wire, strips and the like and forming individual bent pieces therefrom including: advancing and reversing and other suitable apparatus (1) for selectively advancing and reversing the feed of the stock material (2) and to retract the finished bent product; shear and guide apparatus (3) for the stock material (2); bending apparatus (4) having an interchangeable fixed central bending fork (7) to guide and support the stock material (2) and a bending pin (8) for bending the stock material (2) around the central fork (7) in a clockwise or counterclockwise direction.

Abstract: A small size, portable bender operable from a domestically available A.C. source of the order of 100 V having the drive shaft turned through the intermediary of a clutch from a motor to perform a bending operation. Bending angle control means are provided to regulate the clutch to discontinue the bending operation at a desired angle. The bending angle is preset by angle preset means which may be locked in the preset position.

Abstract: A swaging tool assembly for also bending, cutting and flaring tubing which includes a tubing holding block connected to a tool support by a sliding stabilizer bar and a main bar rotated by a speed bar handle. The block has a cutter wheel cooperating with tube guides on the tool support. On the upper part of the support is rotatably mounted a head from which project a plurality of conically configurated flaring ends for flaring by swaging a tube held at one end in a seat on the block. A bending lever with telescopic handle is pivoted eccentrically to the lower end of the support which has tube bending means.

Abstract: A tool for bending metal pipes comprises a base member carrying two adjacent mandrels each of which has a semicircular peripheral annular recess for receiving a pipe, one mandrel being mounted on the base member by means of a circular rotatable bearing disc on which the mandrel is eccentrically and rotatably mounted, means being provided for releasably locking the second mandrel in a coaxial relationship with the bearing disc.

Abstract: A single piece self-supporting shoe of generally oblong shape for use in a conduit bender. The shoe has oppositely disposed arcuately shaped outwardly facing grooves on opposite side portions and is capable of bending either thin or thick wall conduit of varying sizes, all with the same shoe by employing different radii in the opposed grooves of the shoe.BACKGROUND OF THE INVENTIONPreviously shoes for conduit benders for bending thin wall tubing or conduit and intermediate and rigid conduit depended for their operation upon either an internal pivot point support or upon internal access permitting the application of a sizable force therein such as is often produced by a hydraulic ram to drive the shoe. These internal structures of such shoes were integral with their function and tended to limit their design.

Abstract: 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 on the base and which can swivel about an axis thereon. The handle carries a spring-biased slide member on which there is mounted a transverse, upstanding pin constituting a shoulder adapted for engagement with the metal stock. The clamp is in the form of a vise having a fixed jaw constituted as a die, around which the metal stock is formed. The slide member is normally biased toward the pivotal axis of the handle but can yield outwardly in a direction away from such axis as the handle is swiveled, this occurring under the action of forces transmitted through the metal stock as it is being formed. The yieldable shoulder on the handle permits the use of dies having irregular shapes.

Abstract: A method for forming cooling coils of successive layers of rectangular configuration, in which the front end of an elongated tube is threaded between rolls of a straightening apparatus and clamped onto the periphery of a rectangular table, whereafter the table is rotated about a central axis while the incoming tube shifted in direction of this axis, and while the tube upstream of the table is held in taught condition by the straightening apparatus so that the tube is wound into a coil of rectangular configuration about the table. After a coil of predetermined length has thus been wound, the table is stopped, the tube cut between the straightening apparatus and the table and the cut rear end of the tube is also clamped to the table.

Abstract: A pipe bender for bending pipes, comprising two pivotally interconnected levers. The first lever is provided with a pivot pin and a circular segment disposed coaxially thereto which defines the inside bend of the pipe to be bent, for which purpose a slot is disposed in the circular circumferential portion, and with a first outer support for the pipe to be bent. The second lever is provided with a fork having two arms which receive the pivot pin, and with a second outer support for the pipe to be bent. The bar of the first lever may pass during the bending operation between the arms of the fork in order to bend a pipe through an angle of 180.degree. (U-shape). To bend pipes of different diameters the circular segment is divided in two parts relative to its median perpendicular plane. These two halves are to be spaced apart by means of spacer means.