Abstract: A rotary chain jack may include a frame, a dual chain wheel rotatably coupled to the frame, and a stopper assembly mechanically coupled to the frame. The stopper assembly may include latches. The stopper assembly may be positioned to selectively engage a chain passing over the dual chain wheel. The rotary chain jack may be used to moor offshore structures.

Abstract: A method for processing a plate workpiece supported on a workpiece support. The method includes moving a tool die and a tool punch along a stroke axis and toward a processing position above a support plane of the workpiece support. The processing position corresponds to a region of the plate workpiece having a formed shape, which extends upwardly from the support plane of the workpiece support.

Abstract: The invention relates to a novel design of hydraulic processing pincers for processing workpieces, with a tool which, in a first tool part, has an axially displaceable tool plunger which, with a first end or with a tool provided there and an opposite work rest, forms a working region or a working gap and can be moved with the first end towards and away from the work rest, and made up of a hydraulic actuating device for applying a force to the tool plunger via a movable pressure-transmitting element, said force moving said tool plunger in the direction of the work rest. The piston and/or the piston rod are/is designed with a cavity in which the tool plunger is accommodated in its initial position at least over part of its length.

Abstract: A die change method includes providing a press apparatus having a base and a ram, and a first die set including an upper die member and a lower die member. The lower die member is supported on the base and the upper die member is mounted on the ram. The ram is lowered into a closed, home position to mate the upper and lower die members and to perform an operation on a workpiece disposed between the die members. The ram is released from the upper die member. The ram is raised a minimum distance to provide minimal clearance for removing the upper and lower die members from the press. The mated upper and lower die members are moved out of the press with the workpiece held between the upper and lower die members.

Abstract: A cartridge for a machine tool is provided. The cartridge has a main body, two punch-retention arms, and two die-retention arms. Preferably, the cartridge also has a stripper locator base. In some embodiments, the cartridge is provided with an electronic information storage device.

Abstract: A tooling system comprises a plurality of elements (24) arranged in an array, each element being supported on a cross rail (22) and being moveable relative to the other elements in the array. Each element terminates in a threaded support post (25) extending from a first end of the element, and is associated with a corresponding internally threaded aperture in the cross rail upon which the element is supported. The tooling system further comprises an adjusting component in the form of a fork (46) which is driveable in rotation and engageable with an element of the array to drive the element in rotation, upon rotation of the fork.

Abstract: A cartridge for a machine tool is provided. The cartridge has a main body, two punch-retention arms, and two die-retention arms. Preferably, the two punch-retention arms are spaced apart and at least generally parallel to each other. Likewise, the two die-retention arms preferably are spaced apart and at least generally parallel to each other. In some cases, the main body is formed of a first metal, and the punch-retention arms and die-retention arms are formed of metal(s) different than the first metal. In one group of embodiments, the invention provides a cartridge having a weight of less than 3 pounds.

Abstract: The invention relates to an exchangeable tool having a tool body with a receiving end for holding the tool in a receiving structure, wherein a connector is arranged in the tool body for providing a substantially non-rotatable connection with a manipulator for manipulating the tool into and out from the receiving structure, to a combination of such tool with a manipulator for manipulating the tool into and out from a receiving structure, and to a method for manipulating such tool into and out from a receiving structure.

Abstract: A hemming machine is provided with a frame, a hemming tool support structure and a swinging drive structure. The hemming tool support structure is rotatably coupled to the frame to rotate about a center rotation axis. The hemming tool support structure includes a hemming tool disposed at a first location such that the hemming tool moves towards and away from an edge part of a workpiece that is supported on a die upon rotation of the hemming tool support structure. The swinging drive structure transmits a rotational driving force to the hemming tool support structure via a releasable connection located on a side of the center rotation axis that is opposite of the hemming tool. The releasable connection is configured to release the swinging drive structure to allow further rotational movement of the hemming tool away from the die.

Abstract: The specification discloses a die element change tool for use with a crimp press having a plurality of die shoes positioned about a crimping work space, the die shoes being movable from a radial outer position to a radial inner position during a crimping process, the change tool being effective to remove a die element set or introduce a new die element set while the die shoes are in the radial outer position, the change tool having a main body part and a movable body part, the main body part having a number of circumferentially spaced operational positions each capable of retaining an individual die element held at one axial end by the movable body part and at the other axial end by the main body part, the change tool being bodily movable into the crimping work space to position each said die element carried thereby adjacent to a respective die shoe to be secured thereto, said movable body part being movable to disengage from said die elements such that the change tool can be withdrawn from the crimping work

Abstract: A method for operating a mechanical press including at least one electric drive motor, a drive control for controlling the at least one motor, a ram, a mechanical element for translating rotational motion of the at least one motor to linear motion of the ram in a first rotation direction, into a linear motion of the ram arranged to be lowered and raised along a linear path for operating the press to carry out a press cycle including a pressing part and one or more non-pressing parts of the press cycle, and by providing a control output to the drive control such that the speed of the at least one drive motor is varied during at least one pressing or non-pressing part of the press cycle. The press may be reversed between production cycles. Also press and system including a such press.

Abstract: The present invention is a long reach press comprising a low force actuator for operably urging first tooling into a working position. It further includes an opposed high force actuator for operably urging second tooling into engagement with the first tooling. The low force actuator includes a positive stop actuator including a slide block stop for operatively supporting and restraining movement of the first tooling when engaged with the second tooling. The slide block is moveable between a stop extended position and a stop retracted position.

Abstract: Apparatus and a method for establishing setup parameters for use in a machine. In one embodiment a tooling component is removably mountable to a host machine. The tooling component includes a memory that contains information defining setup parameters for the host machine for use with the tooling component. A controller associated with the host machine reads the information from the memory and configures the host machine based on the information read from the memory. In another embodiment, an information carrying tag, is associated with the tooling component. The information carrying tag is read and the identifying information obtained from the tag is used by a controller to select a set of setup parameters from one or more sets of setup parameters stored in a storage device accessible by the controller. A mechanism is provided to precisely position the adapter on the base plate for the host machine to minimize variations in production using the setup parameters derived from the stored information.

Abstract: A digitally controlled machine for bending, forming, folding or coiling a bar conventionally includes a frame, and a rotary bending tool for producing bends in different planes. A bar is moved along an axis and is brought through a bending snout associated with the frame, and then through a bending tool which is movable relative to the axis by a motor-driven turner. The bending tool is received by a standard conical tool support, and the turner is combined with means for automatically clamping and unclamping the jaws of a gripper associated with the turner. The jaws of the gripper are automatically unclamped when the turner reaches the end of its axial stroke, away from the bending station, and are automatically clamped when the turner begins its axial movement in the opposite direction, toward the bending station.

Abstract: A pipe grooving tool is disclosed having a housing on which a back-up roller and a grooving roller are rotatably mounted. The grooving roller is pivotably movable toward the back-up roller and has a raised tool surface engageable with the outer surface of the pipe. The pipe is positioned with its sidewall between the rollers, and the back-up roller is rotated while the grooving roller is forcibly moved toward the back-up roller. A circumferential groove is formed around the pipe as the rollers traverse its circumference. A power drive shaft connected directly to the back-up roller is provided, the power drive shaft engaging a power drive unit on which the tool is mounted operated under power. A manual drive shaft is connected to the back-up roller through a torque multiplying gear and pinion transmission for manual operation of the tool.

Abstract: A threaded member projecting from a press slide includes a projection on its upper end. A motor raises and lowers the threaded member in tandem with a slide adjustment mechanism. A plate disposed on a lower surface of a press crown is moved to slidably enclose the projection. The press slide is locked when the lower surface of the projection and the upper surface of the plate abut each other.

Abstract: Apparatus for carrying out an operation on a mechanical workpiece which operation comprises at least one stroke, or relative movement, along a predetermined path, of at least two tool members (4,5) each being arranged on a tool carrying member (1,2). The mechanical workpiece is positioned between the tool members (4,5) and the tool carrying members (1,2) are approached to each other in a first part of said at least one stroke. At least one force transferring element is arranged to be inserted by means of a low force during said first part of said stroke into a position between at least one tool carrying member and an activation element for transferring a high force during a second part of said stroke between said activation element and said at least one tool carrying member.

Abstract: A slide lock is adapted for positioning within the upper portion, or crown, of a stamping press adjacent its eccentric gears. The slide lock includes a hydraulically actuated, electrically controlled module pivotally mounted to the press crown and including an acme screw and pivoting nut combination, a sector gear, an eccentric, and a sliding block attached to the eccentric. Locking of the slide of the press at any position of the press stroke is initiated by the linear displacement of the slide lock module and by rotating the eccentric to lower the slide lock module toward an eccentric gear. If the sector gear is able to fully mesh with the eccentric gear, the slide lock will continue to lower, with the eccentric rotating beyond its centerline, or beyond bottom dead center, until it contacts a closed, or locked, mechanical stop. The sector gear and eccentric gear are fully in mesh with the eccentric in an axial positive mechanical locked position to prevent press eccentric gear rotation and slide movement.

Abstract: Universal pipe bender comprising a geared motor (1; 11); a box, on a working table whereof two or more pairs of hollow rotary motion drives having fixed parallel rotation axes (2, 2a; 2', 2a'; 2", 2a"; 12, 12'; 12a, 12a') intended to receive, interchangeably and integrally in rotation, in their concavity respective roller hearing mandrels (200) and to transmit to the latter rotary motion impressed by said geared motor through gears arranged in said case, and a through slide (4, 40) that can be slidingly operated and fixable in position in a through guide (4') provided in said case, on the same side where said rotary motion drives open, which traverses the fixed interaxes of said pairs of rotary motion drives, and which mounts one or more further roller hearing mandrels (5, 5'; 50, 50').

Abstract: An inching drive system for a mechanical press including a hydraulic motor and gear mechanism, that engages the flywheel of the press. The hydraulic motor is mounted for rectilinear movement toward and away from the flywheel for selective engagement therewith and includes a gear that meshes with teeth on the periphery of the flywheel. A separate hydraulic piston/cylinder arrangement moves the inching drive system into and out of engagement with the flywheel.

Abstract: When starting up the punch press its eccentric shaft must accelerate through a start-up angle from the resting state up to the operating speed of rotation due to the forces of inertia of the moving structures of the punch press. When stopping the punch press the eccentric shaft is rotated in the direction of normal operation into a position between the upper dead center and the lower dead center position, in which latter position no contacting between the upper tool and the metal strip to be worked upon takes place. From this position the eccentric shaft is rotated backwards by the start-up angle into a start-up angle position. In the start-up angle position again no contact between the upper tool and the strip takes place.

Abstract: A gear train locking mechanism for preventing the reciprocating slide of a mechanical power press from inadvertently moving during maintenance procedures and the like is disclosed. The gear train locking mechanism preferably includes an idler gear which is enmeshed with a drive gear of the power press and a movable arm assembly positioned for selectively engaging the idler gear to prevent its rotation. The engagement of the arm assembly and the idler gear effectively locks the gear train of the power press thereby preventing the slide of the power press from moving once the locking mechanism is activated.

Abstract: An installable slide locking apparatus is installable on a press mechanism so as to lock a press slide of the press mechanism in any of a plurality of positions. The press mechanism includes a gear train means rotatably drivable so as to reciprocate the press slide. An installable slide locking mechanism, which includes a gear reducer and a locking gear, is mounted adjacent an opening made the gear train housing. The gear reducer meshes with an input gear of the gear train, thereby preventing rotation of the gear train when the locking gear is moved to a locking position with respect to the gear reducer.

Abstract: A portable, self-contained collet crimping apparatus includes a base having a hand-actuated hydraulic pump assembly mounted thereon is disclosed. A collet crimping machine is pivotably mounted on the base so as to be adjustably oriented at any desired angle. Means are provided for selectively retaining the collet crimping machine in a desired rotational position relative to the base. The hydraulic pump assembly is connected to actuate the collet crimping machine. The collet crimping machine further includes a pusher which secured to the machine to prevent loss, yet which is slidable between extended and retracted positions. In the extended position, the pusher is disposed outwardly away from the collet crimping machine to permit easy replacement of a die assembly. In the retracted position, the pusher is disposed within the collet crimping machine and precisely aligned with the other components thereof for use.

Abstract: A stamping and bending machine comprises a drive housing with a drive housing visual wall and two drive housing face walls. From each of the drive housing face walls projects at least one housing box. Processing devices are attachable to the housing boxes. A distributor gear is provided within the drive housing. Each of the housing boxes accommodates a housing box shaft drivingly connected with a distributor gear and with the processing devices.

Abstract: A method of installing a slide locking mechanism in a press mechanism so as to lock a press slide of the press mechanism in any of a plurality of positions. The press mechanism includes a gear train mounted in a housing. An installable slide locking mechanism, which includes a gear reducer and a locking gear, is mounted adjacent an opening made in the gear train housing. The gear reducer meshes with an input gear of the gear train, thereby preventing rotation of the gear train when the locking gear is moved to a locking position with respect to the gear reducer.

Abstract: Hydraulic assembly to actuate forging presses (21), which comprises two pairs of hydraulic pumps (17-18) arranged at the ends of the forging presses (21) thus served and in close proximity thereto, a reduction gear unit (16) and a motor (11), at least one brake/clutch unit (20) being included between the motor (11) and the pairs of hydraulic pumps (17-18).

Abstract: A press which is particularly adapted for pressing casings, cable shoes or such items onto a body, having a steering element supported against a drive which on one hand is connected at the press plunger, and on the other hand, is connected with the cylinder, and which upon movement of the press plunger in the working direction, moves the steering element at a fraction of the speed of the press plunger, whereby a locking device, actuated by the workpiece to be pressed, connects the steering element with the press plunger in such a way that the steering element moves with a speed equal to that of the press plunger and that there is an arresting device at the steering element which, in a predetermined position of the press plunger, blocks pressure medium feed to the work room of the cylinder.

Abstract: A machine, which is portable, and method for roller swaging hydraulic fitting sleeves onto metallic tubing comprises a tapered roller mandrel expander under either or both torque control of swaging or diameter control of swaging. The machine provides an automatic swaging cycle with an optimum overall time cycle for swaging performance. A motor drive is movably mounted relative to the mandrel expander assembly. The motor drive is manually moved longitudinally to activate the mandrel. Portability and hand held use can be effected by removing the power unit from the frame.

Abstract: A punching device is provided which includes a plurality of punching units arranged in a side-by-side fashion on a substantially horizontal working surface. The device includes a plurality of punches and dies of different shaped, and a moving assembly, for supporting a holder frame, which moves a workpiece along both X- and Y-axes on a working table. A control unit is provided for inputting punching positions on the workpiece as well as the shape(s) of the holes to be punched, as well as for controlling operation of the moving assembly and punching units in response to inputted data, and for moving the punching positions of the workpiece below the desired punching units to perform punching operations. The punching units each comprises a substantially -shaped supporting member in which a piston is provided for moving a punch upwardly and downwardly. The punch is provided in one arm of the -shaped support member, with a corresponding die in a lower portion of the support member.

Abstract: A collet surface structure is provided for a high-speed hydraulic press having collet interlock in order to eliminate leakage of oil into the clamping region. Furthermore, the formation of a harmful hydrostatic film thickness from the lubricating-oil film between the pressure rods and the collets is prevented, since the oil is immediately forced away due to the high clamping pressure between the clamping faces. These high clamping pressures result from the extremely short space of the lubricating-oil elimination grooves and the large capacity of the grooves. Thus, the oil-eliminating grooves are made large enough to eliminate reliably a hydrostatic oil film of at least 0.1 mm. This regularity is independent of the clamping diameter of the collet.

Abstract: 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 parallel axes, corresponding to three different speeds which are obtained by fitting a conventional handle or any other appropriate structure into a socket driving a gear shaft, and thus making the reduction gear rotate at the desired speed; and a transmission mechanism which is connected with the output gear of the speed reducer and which transmits to a gear train up to the final gear to turn the main driving shaft integral with it and mounting the bending member or matrix.

Abstract: This invention is related to an improved structure of punch for venetian blind manufacture and more particularly to the one which is including a revolving seat to control the operation of a punch tool guide block assembly, which guide block assembly is comprised of an upper guide block movably connected with a bottom guide block. Through the operation of the adjusting seat, the punching process is rapidly and efficiently alternated.

Abstract: A rolling mill drive with spindles arranged axially slidably between pinions and work rolls. A joint of each spindle is releasably connected to the neck of at least one roll, particularly the work roll. At least the spindle joint connected to the work roll includes a coupling and uncoupling device, preferably an annular bayonet-type coupling device.

Abstract: A punching machine having a workpiece guidance system and a numeric control therefor, has one or more tool holders mounted upon the transverse rail of the guidance system, and a tool mounting assembly for receiving the punch and the die from the tool holder and securing them into position for punching of sheet metal and like workpieces. The workpiece guidance system effects the motion of the tool holder forwardly to bring the tools into the tool mounting positions, and the tools are then clamped in position. The guidance system is then moved rearwardly with the empty tool holder to a position where the punching operation can be conducted. Generally, the work table and the workpiece are moved forwardly with the workpiece guidance system during the tool changing operation, and a channel is provided in the lower portion of the frame and its worktable to permit movement of the tool holder and the die below the plane of the upper surface of the worktable.

Abstract: There is disclosed a mechanically powered tool comprising a crimping device capable of shearing tines out of an angle-bar used for protecting a corner formed by two wall panels and driving the tines into the panels for fixing the angle-bar thereto; the crimping device including a rectilinearly reciprocable actuating rod movable in a working stroke. Operatively connected to one end of the actuating rod to displace it in its working stroke is a follower block of a movement-transforming device, which block is made to be displaced in a rectilinearly reciprocable motion; the transforming device further having a rotary input section. Connected to the latter is a rotary shaft of a single-revolution clutch which further has a rotary input section operatively connected for its rotation, to a rotary output member of a power assembly.

Abstract: The apparatus and process of a hydraulic press (20) for molding or forming an article, which apparatus has a frame (21) with a top unit (22) and a base unit (23) interconnected to the top unit (22); a slide (28) adapted to have an upper half (38) of a mold attached thereto; first hydraulic device (31) interconnected between the top unit (22) and the slide (28) for controllably moving the slide (28) vertically relative to the frame (21); a bed (36) fixed on the frame (21) and adapted to have a lower half (37) of the mold attached thereto, the lower mold half (37) adapted to have an article to be molded placed therein; second hydraulic device (39) connected to said top unit (22) and including at least one elongated ram (41), the second device (39) controllably moving the ram (41) vertically relative to the slide (28) and releasably lockable to the ram (41 ) at any predetermined location lengthwise of the ram (41), the positioning being incrementally variable, whereby vertical movement of the ram (41) is transmi

Abstract: In a wire and band processing machine, a drive system is positioned on one side of a processing plate and a fastening arrangement is provided for mounting processing units on the other side of the processing plate. The processing units are connected to the drive system through holes in the processing plate. The drive system includes at least one worm shaft extending parallel to the processing plate and a worm gear can be releasably positioned in meshed engagement with the worm shaft. The axis of the worm gear extends perpendicularly to the processing plate and to the worm shaft.

Abstract: A safety power tool is described which is useful as a hardware insertion press. It includes a punch aligned slideably between an anvil and a short stroke power ram adapted to move the punch toward the anvil through a relatively short distance and a spacer movable to an opening between the ram and the punch to contact the ram at one end and the punch at the other end for transmitting the short stroke motion of the ram to the punch. A long stroke retraction actuator is connected to the punch for withdrawing the punch from the anvil when the spacer is moved laterally to an inoperative position to provide a relatively large clearance space between the punch and the anvil but with the spacer out of the way, the ram is rendered ineffective to apply pressure to the punch thereby preventing injuries.

Abstract: A roll stand has a frame, an upper backup roll and a lower backup roll rotatable in the frame about respective vertically spaced axes, and an upper working roll and a lower working roll flanked by and operatively engaging the respective backup rolls. A workpiece normally passes horizontally through the nip formed by the working rolls. Actuators can urge the backup rolls toward each other with a high force and with a low force. Respective upper and lower drives are connected to the respective backup rolls and energizable for rotating same and thereby pulling the workpiece engaged between the working rolls through the roll stand. A clutch is connected between one of the drives and the respective backup roll and is openable to rotationally disconnect the one drive from its backup roll. A controller is connected to the one drive and the clutch for deenergizing the one drive and opening the clutch for low-force rolling. For high-force rolling the clutch is closed and both drives are energized.

Abstract: A method for hot rolling of bevel gears by infeeding a rotating gear roll die having a synchronizing member into a rotating work gear having a synchronizing member. First, the teeth of the synchronizing members are brought into engagement, and then rough forming of teeth on the work gear takes place under the action of the teeth of the gear rolling die, wherein the synchronizing member of the work gear is acting as the driving member, and finish rolling of the rolled teeth of the work gear takes place, with the rotating gear rolling die acting as the driving member.An apparatus for carrying out the above method for hot rolling of bevel gears includes a work gear spindle having its power rotation drive and a gear rolling die spindle having power drives for its rotation and axial movement, the spindles being installed in the bed at an angle with respect to each other.

Abstract: A spindle press of the type in which an inertial mass controls the clutch connecting a continuously rotatable flywheel with the spindle and is effective when the ram is retarded to decouple the spindle from the flywheel. The control unit is provided directly on the ram and the mass is arranged so as to be movable at least with its principal component of movement in the working direction of displacement of the ram, thereby excluding from significance any distortion of the spindle and the spindle nut drive between the ram and the flywheel.

Abstract: The invention is a shifting mechanism for a screw press. The screw press includes a shifting coupling for the press spindle, a drive mechanism for continuously rotating a flywheel, a coupling mechanism operatively located between the flywheel and the shifting mechanism which is dependent upon angular deceleration and is controlled for the purpose of actuating the coupling mechanism. The shifting mechanism comprises a hydraulically actuatable shifting coupling. A hydraulically prestressed valve is located between the reaction mass and a rotating coupling portion that is connected to the flywheel. The coupling mechanism is controlled through the use of a hydraulic line and the prestressed valve is affected by the hydraulic pressure medium in that line acting upon the coupling mechanism.

Abstract: A punch press (20), for punching a workpiece, utilizing an elongated punch support which is formed from removable interconnected punch cartridges (92) and an elongated die support which is formed from removable interconnected die cartridges (94). A punch head (32) is supported from a frame (30) which spans the punching area. A two axis positioning system is provided for positioning the sheet metal workpiece within the punching area beneath the punch head. Punch head (32) through appropriate mechanical interposer (160) engages a punch which in conjunction with an associated die, positioned there beneath, forms a hole in the workpiece. The elongated punch sections (92) and die sections (94) can be moved out of the punch press frame, disengaged and removed or replaced. The first punch section (92) and first die section (94) engage driver sections (192, 194) which are disposed in the frame (30). The driver sections (192, 194) are then moved to bring the tool supporting sections (92, 94) into the press.

Abstract: A control device for a small press is provided with means preventing overloading of the drive motor, a timer for detecting when an operational cycle of the press has exceeded a normal value, and a position detector which notes the position of a cam of the press. The power switch of the drive motor is tripped to suspend the flow of current to the motor upon an indication of the foregoing, e.g., a detected over-current, an excessive cycle time, or an operation end position of the cam.

Abstract: A safety control system for a metal forming machine having a vertically moving forming ram which cooperates with a stationary forming die for forming a variety of creases in sheet metal manipulated by an operator. The safety control system returns the forming ram to an inactive position in the event the operator inadvertently positions tool or limb between ram and die during machine operation.

Abstract: The application discloses a control system for a mechanical press in which two separate control circuits must simultaneously produce control signals to operate the ram through its ram cycle. If either of the control circuits produces a spurious output or intermediate signal or fails to produce a proper output or intermediate signal, circuitry will detect such occurrences and stop or prevent operation of the ram. A plurality of checking circuits constantly monitor input signals, intermediate signals, and output signals to insure that the press is not activated by spurious signals. A circuit is provided to allow the run buttons to be used to initiate an upstroke of the ram of the press, and an indicator transmits information to the operator of the press to indicate operational status of the press.

Abstract: A machine, particularly for stamping or nibbling, comprises a reciprocating tool drive having a plurality of tools connected to the drive for selective reciprocation thereof. The drive includes means for stopping at least one of the tools for exchange purposes and a tool-change member is mounted for movement alongside the tool drive and includes a member movable transversely to the reciprocation direction for engaging and removing a tool which is stopped or disconnected from the drive in order to effect an exchange with another tool without stopping the drives of these other tools. The machine also includes means for engaging and moving a workpiece transverse to the reciprocating direction.

Abstract: This case discloses a forging press having a pump ram inserted into the upper part of a cylinder within a frame, a press ram into the lower part thereof, and a cavity filled with working oil provided between both parts of the cylinder for transmitting the mechanically given reciprocating motion of the pump ram to the press ram by the working oil, said forging press comprising a stopper provided outside the frame for mechanically controlling the upper limit position in reciprocating motion of the press ram and enabling an adjustment of the position where the stopper and corresponding portion of the press ram come into contact with each other, from outside during operating the press, wherein a controllable check valve for open-and-close operation is provided in the middle of oil passage which communicates with working oil supply source and working oil in the cylinder, for feeding or discharging oil into or from the supply source therethrough according to shortage or excess of oil quantity in the cylinder result

Abstract: A portable pipe grooving apparatus includes a pair of mating rollers mounted upon a frame so as to be radially adjustable with respect to each other. One of the mating rollers is connected to a rotatable shaft which extends rearwardly from the apparatus so as to enable the apparatus to be coupled with a drive means which is removably associable with the shaft for rotating the one roller. The frame further includes a coupling means for detachably connecting the frame to the drive mechanism by projections carried by the drive means slidably engaging within annular socket elements, which socket elements also serve as supporting legs for the frame.