Abstract: A stent compression method for particular use in pre-surgical securing and conforming of a vascular stent upon an angioplasty balloon. One variation of the stent compression method comprises inflating an agioplasty balloon inside a vascular stent in order to secure the vascular stent upon the balloon; applying uniform compression pressure around the balloon/stent unit; and adjusting the internal balloon pressure and the compression pressure so that the balloon/stent unit is compressed. A pressure chamber with an elastic cylindrical membrane mounted inside the chamber may be used to provide the compression pressure. The inflated balloon provides the balancing pressure from inside the stent. The maintenance of internal balloon pressure during the stent compression process may provide uniform distribution of pressure along the stent and even radial compression rate around the circumferential surface of the stent.

Abstract: Thermal regulation of a coated work-piece during the reconfiguration of the work-piece is provided. One method embodying the invention comprises placing an externally coated reconfigurable work-piece, whose hardness has been temporarily modified to resist damage during the reconfiguration of the work-piece, into a reconfiguration chamber of a reconfiguration apparatus and reconfiguring the work-piece from a first configuration to a second configuration via physical communication between the external coating of the reconfigurable work-piece and the reconfiguration apparatus.

Abstract: A tool for driving a stator slide under a stator wedge within a radial slot of a stator core includes a frame including a pair of elongated rail members, the frame provided with a pair of handles at respective opposite ends of the elongated rail members. A force application cart is located between the rail members, the force application cart having a drive block thereon. A drive is connected to the frame, substantially intermediate opposite ends of the frame, the drive having an on/off trigger located on one of the handles. A lead screw is threadably engaged at one end with the force application cart and connected at an opposite end to the drive such that the drive rotates the lead screw when actuate; wherein in use, rotation of the lead screw causes axial movement of the force application cart and the drive block along the elongated rail members.

Abstract: The invention addresses the problem of demounting a prestressing cable having a sheath, tendon extending in the sheath and tensioned between two anchoring devices, and a hardened material filling the sheath around the tendons. An energy dissipation device is installed between a zone of the structure and an accessible portion of the cable. The energy dissipation device has a first end applied to a bearing zone and a second end. It is suitable for limiting the force to which it is subjected as a function of the speed of relative displacement between its first and second ends. A first member for retaining the cable is arranged adjacent to the aforesaid portion of the cable. This portion is clamped in a second retaining member engaging the sheath and connected to the second end of the energy dissipation device. The cable can then be severed between the first and second retaining members.

Abstract: A concentric alignment assembly device for assembly of a first component and a second component. The concentric alignment assembly device includes a first base and a second base for receiving the first component and the second component. The first base has a pedestal and an adjusting portion, in which the adjusting portion is movably and rotatably coupled to the pedestal, and has a first platform for receiving the first component. The second base is provided on a side of the first base, and is movable within a fixed range and direction in relation to the first platform. When the second base moves toward the first base, the adjusting portion adjusts radial displacement and axial deviation of the first component in order to assemble the first component and the second component.

Abstract: The invention relates to a device for pneumatically operating a tool which can be driven by means of pressure, such especially, pneumatic pliers. The device has a cylinder comprising one or more pneumatically operated, nonpositively fitted pistons arranged in a row, for generating a translatory force. The respective piston rods of the pistons are sealed against the preceding piston and guided in cylinder covers by means of a seal, such as a lip seal. Components such as a wedge piston are functionally connected to the pistons, said wedge piston being coupled to a cuneiform wedge, for transferring the translatory force and for operating the tool. The pistons are supported by at least one piston guidance strip, in the direction against the inner wall of the cylinder.

Abstract: A tool for removal of a pulley from a shaft includes articulated arms mounted on a hub with a thrust bolt provided to drive the hub and attached arms outwardly from a shaft on which the pulley is mounted. The arms comprise jaw members which in combination with wedge members ensure maintenance of the jaw members in mechanical contact with the pulley to thereby effect its removal from a shaft.

Abstract: The present invention relates to hoisting and handling systems and methods. The present invention is a system and method to facilitate the hoisting, positioning, installation and removal of continuous track drive units. Continuous track drive units are used as a means for propelling certain vehicles, such as farm tractors, construction machines and military vehicles. The present invention allows for simplified, efficient handling and transfer of continuous track drive units.

Abstract: A bearing detachment device has a main panel, a pneumatic cylinder, a plurality of support rods, a plurality of catch plates, a fast positioning device, a plurality of oblong blocks, a plurality of connecting bars, and a cylindrical block. The main panel has a center hole to receive the pneumatic cylinder, a plurality of lugs, and a plurality of bottom grooves. Each support rod has a threaded pillar inserted in the oblong block. Each oblong block is inserted in the corresponding bottom groove. Each catch plate has two end claws. Each connecting bar is inserted in the corresponding lug. Each connecting bar and the corresponding lug are fastened together. Each connecting bar and the corresponding catch plate are fastened together. The fast positioning device is disposed on the main panel. The cylindrical block has an oblong groove and a threaded column to engage with an end block of the pneumatic cylinder.

Abstract: A rail puller that applies tension to rail sections to reduce the gap between the ends of rail sections. The rail puller comprises a first clamp assembly and a second clamp assembly located at opposite ends of the rail puller. A clamping beam is coupled to the first clamp assembly and the second clamp assembly, and has a clamping cylinder that extends and retracts to adjust the length of the clamping beam. At least two pulling members are coupled to the first clamp assembly and the second clamp assembly, and each pulling member has a pulling cylinder that extends and retracts to adjust the length of the pulling member. The clamping cylinder extends to clamp the clamp assemblies to rail sections, and the pulling cylinders retract to draw the clamp assemblies toward one another and reduce the gap between the rail sections.

Abstract: A frame is supported on adjustable jacks for aligning with a pile driver hammer body for removal or installation of the hammer piston. A terminal tube on the frame clamps to the hammer and a powered ram moves the piston.

Abstract: A method is provided for removing a slug from a frame of an automobile. A mandrel configured for insertion into an aperture of the slug and a mandrel engaging plate configured to engage the mandrel. The method also includes a cammed jaw connected to the mandrel engaging plate and an actuator. The mandrel engaging plate is configured to engage the automobile frame and the actuator is configured to separate the cammed jaw from the mandrel engaging plate such that the mandrel is drawn through the aperture of the slug, thereby removing the slug from the automobile frame.

Abstract: A hydraulic assembly system is described. The system includes a hydraulic assembly tool connected by a hydraulic connection to a hydraulic pressure source which supplies a pressurized hydraulic fluid to the tool. The system includes a switch mounted on the hydraulic assembly tool and one or more signal connections between the switch and the hydraulic pressure source whereby activation of the switch causes the hydraulic pressure source to supply the pressurized hydraulic fluid to activate the hydraulic assembly tool.

Abstract: A device for operating on tires comprising an outer carcass and an inner toroidal ring of deformable material; said device comprises a base which supports means for supporting the outer carcass of the tire, and movable means for extracting or inserting said ring from or into said carcass, said latter movable means being provided with at least one appendix arranged to interact with a portion of the edge of said ring.

Abstract: A cylinder head elevator tool developed and constructed to expedite the replacement of cylinder head gaskets, pistons, connecting rods, liners or sleeves, intake valves, exhaust valves, and many other associated components in diesel engines. The cylinder head elevator includes a lower bracket or support bracket engageable with the diesel engine cylinder block, an upper bracket or cylinder head bracket, including a collar assembly, engageable with the cylinder head, and a hydraulic jack or hydraulic ram engageable at it's base with said lower bracket and engageable at its moveable shaft end with said upper bracket.

Abstract: A process for installing a stator slide under a stator wedge in a radially oriented slot of a stator core assembly includes: a) loading windings in the radial slot, the radial slot having axially extending dovetail grooves in opposing sidewalls thereof; b) loading at least one stator wedge and stator slide in the dovetail grooves of the slot, and tightening the at least one stator wedge with the stator slide; c) loading at least one additional stator wedge in the dovetail grooves; d) locating at least one additional stator wedge slide relatively loosely under the additional stator wedge: and e) using the at least one stator wedge as a force reaction point, applying a force to the additional stator slide to drive the additional stator slide under the additional stator wedge.

Abstract: A large size clamping device for detaching a bearing having three cambered base blocks is disclosed. An inner edge of each base block is formed with a thinner top cambered surface. Each side of the base block has a penetrating connecting hole. Three connecting rods are used to connect the three base blocks by each connecting rod passing through the connecting holes of two respective base blocks. Thereby, an area confined by the base blocks is adjusted by adjusting the connections of the base blocks and the connecting rods. Thus the clamping device is suitable for bearings of different sizes. Moreover, the forces between the bearing to be pulled out and the clamping devices are more uniform so that the bearing will not be harmed.

Abstract: A rail wheel set extractor apparatus and method for extracting, transporting, and installing rail wheel sets is disclosed. The apparatus has a frame with a support system adapted to straddle a rail wheel of a rail wheel set. The apparatus includes an attachment system which is adapted to operatively attach the frame to the rail wheel and a member which prevents rotation and movement of the rail wheel.

Abstract: A device for assembly of a flexible conduit element consisting essentially of a flexible ring-corrugated or helical-shaped bellows body which is displaced over an inner arbor in order to introduce a jacket into the corrugations of the bellows body, has an the inner arbor comprising actuating elements for engagement into the corrugations of the bellows body at an inner side thereof. The inner arbor has an axial length which can be adjusted.

Abstract: A pressing machine for joining two workpieces includes a workbench (10), a rigging (30) providing periodical vertical movement, a pair of pressing devices (42) for impacting the workpieces, and a push apparatus (70). A wedge block (40) is secured under the rigging. The wedge block has two first slopes (48). The push apparatus includes a push block (70) with a second slope. A stop screw (26) is secured in the workbench. When the rigging is moved downwardly, the pressing devices impact the workpieces and the first slopes abut against the second slope. The push block is moved toward the workpieces, thereby pushing one workpiece to move relative to the other one. When the wedge block abuts the stop screw, the push block stops pushing the workpiece. The moving workpiece is completely engaged with hooks formed in the stationary workpiece at corresponding openings defined in the moving workpiece.

Abstract: A tool for more quickly and efficiently removing the liner bolts that hold sections of liners to the inside of an ore grinding mill shell. The tool has thick-walled tubular barrel with a front cap assembly and a rear valve assembly at opposing ends. A projectile is slidably disposed in the barrel chamber. The rear valve assembly connects to a supply of compressed air to deliver compressed air to the chamber and cause the projectile to move rapidly forward toward the front end cap assembly and contact an impactor, which is in contact with the liner bolt to be removed. The forward movement of the projectile causes the impactor to move forward and drive the bolt out of the shell and liner. The tool has little recoil effect and utilizes a safety absorber to reduce the likelihood of damage or injury from use of the tool.

Abstract: A base is supported on adjustable jacks for aligning with a pile driver hammer body for removal or installation of the hammer piston. A terminal tube on the base clamps to the hammer and a powered ram moves the piston.

Abstract: The present invention resides in a tool that is provided for separating a cutting bit from a cutting bit holder used in connection with a rotary a cutting assembly for use in a roadway surface reclaiming machine. More particularly, this invention is directed to providing a tool for quickly and effectively removing cutting bits from the cutting bit holders. The present invention accomplishes this objective by providing a pulling mechanism that is mechanically assisted. In this invention, a bit puller is provided for engagement with the cutting bit and is also attached to a powered retractor to forcibly move the cutting bit. The cutting bit and the retractor are fixed to an outer frame or brace. This outer frame or brace generally circumscribes the bit puller to provide an inner space within which the bit puller can be moved by the retractor. The outer frame or brace has a surface for engaging the cutting bit holder to position the retractor during separation.

Abstract: A process and apparatus for installation of a lockbolt to fasten together an assembly of at least two parts having a viscous fluid such as adhesive or sealant in the interface between the two parts, inserts a lockbolt into aligned holes through the two parts and exerts a pulling force of a predetermined intermediate magnitude on the lockbolt while reacting the pulling force against opposite sides of the assembly to exert a compressive force on the assembly to squeeze the fluid out of the interface. The intermediate pulling force is maintained for a precisely timed dwell period based on an optimal period for that fluid and that temperature. After the dwell period, the pulling force is increased in magnitude while simultaneously swaging a collar into threads on the lockbolt to secure the collar on the lockbolt and secure the lockbolt in a state of tension in the hole in the assembly. The pulling force magnitude continues to increase said until the pintail breaks off the lockbolt.

Abstract: In order to properly press-fit or thrust a cylindrical coiled body into a cylindrical case, a fitting device is provided. The fitting device comprises a guide member formed with a conical bore of which cross section gradually reduces with increase of a distance from a top of the bore toward a bottom of the same. The cross section of the bottom of the bore is slightly smaller than that of the coiled body. The guide member is coaxially put on the cylindrical case. The fitting device further comprises a pressing member which, when actuated, presses down the cylindrical coiled body raised in the bore thereby to thrust the raised coiled body into the cylindrical case through the bottom of the bore. The pressing member includes a center base plate, two side plates positioned on both sides of the center base plate, a guide structure by which the side plates are radially movable in opposite directions with respect to the center base plate, and biasing members for biasing the side plates radially outward.

Abstract: A fixture for automatically positioning a sunroof glass within a sunroof frame, mounted in an automotive vehicle, is provided. The fixture includes an outer assembly configured to attach to the vehicle roof. The fixture further includes an inner assembly having first and second net blocks connected thereon. The first and second net blocks define the desired installation position of the sunroof glass with respect to the vehicle roof. The inner assembly is configured to attach to the vehicle roof. The inner assembly is further configured to attach to the sunroof glass and to move the glass against the first and second net blocks. The inner assembly is disposed substantially within the outer assembly and is pivotally connected at a first pivot point to the outer assembly. Finally, the fixture includes a first movement actuator disposed between the outer assembly and inner assembly for selectively rotating the inner assembly about the first pivot point relative to the outer assembly.

Abstract: A fastener puller capable of removing fasteners embedded in a material having a surface, the puller having a handle, a horn having a wedge, connecting means form mounting the horn to the handle and an elongated ram slidably mounted with respect to the handle. As the ram is moved along a slide path, the ram abuts the horn causing the wedge to be forced underneath the head of a fastener. As the ram continues along the slide path and contacts the surface, the horn and handle are pushed away from the surface causing the fastener to be pulled out of the material.

Abstract: Apparatus for withdrawing at least one screw from the barrel of a screw extruder in conveying direction of the screw extruder, with the screw defining a longitudinal axis and terminating in a screw cap, includes at least one gripper having a free end for attachment of a pull mechanism and a grabbing end for interaction with an undercut of the screw cap. The grabbing end is formed with a plurality of radially resilient clamping segments for formation of a hollow cylinder having an inner diameter, which substantially corresponds to an outer diameter of the screw cap, and an outer diameter which is smaller than a diameter of a bore of the barrel.

Abstract: The present invention relates to hoisting and handling systems and methods. The present invention is a system and method to facilitate the hoisting, positioning, installation and removal of continuous track drive units. Continuous track drive units are used as a means for propelling certain vehicles, such as farm tractors, construction machines and military vehicles. The present invention allows for simplified, efficient handling and transfer of continuous track drive units.

Abstract: A device for removing eyelets, in particular stainless steel eyelets, from textile or plastics sheets is provided. Eyelets in textiles or plastics sheets, for example in lorry tarpaulins, wear through in the course of their use and thus have as a rule a significantly shorter service life than the textile or plastics sheet. Thus, it is usual and economically worthwhile to replace the worn-through eyelets with new ones, in order thus to be able to exploit the total service life of the textile or plastics sheet. The removal of eyelets previously has been effected as a rule by hand, which is time consuming and uneconomical. Thus, there is provided a device for removing eyelets, in particular stainless steel eyelets, from textile or plastics sheets, having a claw head for pressing a beading of the eyelet in the direction of the eyelet center point or in the opposite direction.

Abstract: Hydraulic assembly tool having a tool fixed portion having a proximal end and a distal end. The tool fixed portion includes a hydraulic cylinder having a fluid pressure port at the proximal end of the tool fixed portion. The fluid pressure port is for receiving a fluid having a controllable pressure. The tool fixed portion includes a fixed jaw. The tool also has a moveable portion including a moveable jaw and a piston disposed in the hydraulic cylinder, the piston receiving a hydraulic force from the pressurized fluid. There is a compression spring engaging the tool fixed portion and the tool moveable portion, the compression spring urging the tool moveable portion including the moveable jaw in a direction opposite the direction of the hydraulic force.

Abstract: As means for handling elongate and flat workpieces flowing in a manufacturing line, three handling devices are provided. First one is a workpiece transmitting device which functions to push down, one after another, the frontmost one of a mass of raised workpieces horizontally put on a table structure. Second one is a parts-mass compressing device which compresses a mass of raised workpieces horizontally put on a table structure to a desired smaller size by using moving and fixed plates. Third one is an assembling device which connects a header pipe to each side of a compressed mass of raised workpieces horizontally put on a table structure.

Abstract: A tool is disclosed for axially urging a bearing assembly into and out of a seated position on the neck of a roll in a rolling mill. The tool includes a piston surrounded by a cylinder. The piston is removably fixed to the roll neck and is configured to internally subdivide the cylinder into first and second chambers. Fluid conduits are arranged to alternatively pressurize the first and second chambers to alternatively shift the cylinder with respect to the thus fixed piston in opposite first and second directions. Movement of the cylinder in the first direction urges the bearing assembly into its seated position, and movement of the cylinder in the opposite second direction dislodges the bearing assembly from its seated position.

Abstract: A ring member and ring members made of metal are tightened and installed to the outer circumferential surface of a body made of a resin material. Accordingly, the body is prevented from outward deformation. When a tube joint is used in a high temperature atmosphere, even if any force acts on a fluid tube in the direction to cause detachment from the tube joint due to any external force or the pressure fluid flowing through the inside of the tube joint, then the fluid tube and a connecting member inserted into the body are reliably prevented from disengagement.

Abstract: A combination tool system, comprising a hand-held, valve keeper remove/install tool and an engine head clamping support device. Both the hand-held tool and the clamping support device are used together, and include special extraction and installation mechanisms and support parts that enable the easy and safe removal and installation of the segmental valve keepers of an internal combustion engine having cylinder heads with four valves per cylinder, and having recessed valve springs. Removal or installation of a segmental valve keeper typically takes less than a minute. Using the invention tools together avoids the usual risks of causing damage to valves and possible loss of parts. The tools are efficient to use and inexpensive.

Abstract: A device for displacing tubular elements relative to one another has two clamping members each movable between an open position in which each of the clamping members is open and can be arranged on a tubular element and a closed position in which each of the clamping members is closed, a fluid-operated unit located between the clamping members and operative for moving the clamping members axially relative to one another, and a power source operative for supplying the fluid operated unit with power fluid so that it can activate the fluid-operated unit and to move the clamping members relative to one another.

Abstract: The present invention provides a workholder and a method for securing a work piece by engaging either a bore contained in the work piece or by gripping the edge of the bore of the work piece. The workholder includes a support platform, and a bore clamping device that is mounted to the support platform. The clamping device has a cylindrical, expandable arbor extending upwardly from the support platform for positioning in and engaging the bore or for gripping an outer edge of the bore.

Abstract: A process and system for manufacturing a built-up camshaft by which the operational safety of the camshaft is ensured in a simple manner in any engine operation and the camshaft can arbitrarily be adapted to abutments which have different positions because of the individual engine construction. At least one cam is pushed onto a hollow shaft, after which the hollow shaft is expanded between the two faces of the cam which extend transversely with respect to the longitudinal course of the hollow shaft and at the respective bearing point by means of a highly pressurized pressure fluid. This fluid is delivered by a lance-shaped probe introduced into the hollow space of the shaft. On the one hand, a press fit occurs between the cam and the hollow shaft and, on the other hand, a bulging of the bearing point of the hollow shaft occurs which bridges the distance between the hollow shaft and the abutment.

Abstract: An apparatus and method for installing a threaded fastener having a sleeved or interference fit into a workpiece. The apparatus of the present invention includes a pulling device for pulling the threaded fastener into the workpiece, an adapter for connecting the threaded fastener and the pulling device, and a collar that fits over the adapter for allowing the adapter to more inside the collar when subject to a pulling force from the pulling device. In addition, the aforementioned apparatus may be used in a method for installing the threaded fastener having a sleeved or interference fit into the workpiece. The method includes inserting the threaded fastener into the workpiece until the threads of the fastener are exposed on the other side of the workpiece, attaching an adapter to the threaded fastener, placing the collar over the adapter and attaching the pulling device. The pulling device is then pressurized so as to pull the threaded fastener into the workpiece until the threaded fastener is fully seated.

Abstract: An apparatus and method for installing a wheel disc into a wheel rim to manufacture a vehicle wheel includes upper and lower disc engaging members, which are clamped against opposite sides of the disc, and upper and lower rim engaging members, which engage upper and lower edges of the rim. The disc is first separated from the rim to assure proper alignment between the disc and rim and then forced into frictional engagement with the rim, while a compressive force is applied axially along the rim to relieve stresses and facilitate installation of the disc into the rim.

Abstract: A shaft and club head separation device for a golf club includes a base having padded shaft gripping members and a separation disk having at least two peripheral recesses into which the end of shaft is inserted; the gripping members are arranged to maintain the club shaft parallel to the axis of the separation disk; a plunger in slidably disposed in a bore in the base and an actuation device is provided to engage the plunger and move the plunger and disk away from the base so that, with the hosel of a club engaging a face of the disk, separation of the shaft and club head will occur.

Abstract: An end cap is supported by a retractable holding mechanism between an edge press and tube end. A pick up mandrel and extender are mounted in the edge press head. The pick up mandrel is extendible from the edge press to contact the end cap. Non-mechanical means on the pick up mandrel secure the cap to the pick up mandrel while the holding mechanism is retracted. The pick up mandrel carries the end cap to the tube end. The extender is collapsed under pressure of the edge press, allowing it to contact the skirt of the cap and press it into the tube end. The pickup mandrel is retracted into the edge press head, releasing its grip on the end cap, and the edge press head and pickup mandrel are retracted for another cycle.

Abstract: An apparatus for removing struts from pivoting landing gear supports of a plane having retractable landing gear includes a stiffening anchor attached to a distal end of the strut wherein the distal end is the end at which the wheel is attached. The apparatus further includes a press collar that slidingly contains the strut within it. In between the press collar and the stiffening anchor is a hydraulic ram that provides up to twenty thousand pounds of urging pressure. The urging pressure provided by the hydraulic ram is axially translated into the aircraft pivoting landing gear support and into the landing gear strut in an opposite axial direction to remove the strut. The stiffening anchor is formed to fit the strut and to distribute the urging pressure in a way that does not damage the strut.

Abstract: A device for mounting a bearing onto a shaft includes a tube connected to the shaft and having an open end. Three grooves are defined longitudinally in the tube and communicate with the open end. A pushing member has three wings extending radially outward therefrom and the wings are movably received in the grooves. Each of the wings has a rod slidably and perpendicularly connected thereto so as to contact a surface of the bearing. A hydraulic pushing rod pushes the pushing member toward the shaft so that the bearing is moved on the shaft.

Abstract: A device for disassembling a universal joint for removal of the connecting member of a universal joint with minimal effort. The device for disassembling a universal joint includes the universal joint having a generally cross shaped connecting member with two pairs of ends. Each of the ends has a cap thereon. The connecting member connects two arms. Each of the arms has an end that is U-shaped. Each portion of said U-shaped end has a bore therein for receiving an end of the connecting member. The device has a frame. The frame has a top wall, a bottom wall, a first side wall and a second side wall. A bore for insertion of a cap of the connecting member is in the second side wall. A pressing assembly urges the ends of the arms against the second side wall of the frame. The pressing assembly has a pump portion and an extendable arm such that the extendable arm extends away from the pump portion.

Abstract: The present invention provides a workholder for securing a work piece by engaging at least one bore contained in the work piece. The workholder includes a support platform, bore clamping device, and a locator assembly. The bore clamping device is mounted to the support platform and has a cylindrical, expandable arbor extending upwardly from the support platform for positioning in and engaging the bore.

Abstract: This invention is directed to a pusher tool for pushing a member out of passageway. In particular, the pusher tool is for pushing a grease cup in the passageway of a yoke in a universal joint. Wherein the grease cup for holding grease and bearings becomes frozen in the passageway in the yoke, it may be very difficult to remove the grease cup from the passageway. A housing can be attached to the yoke. In the housing, there is a plunger which can be moved in the passageway in the yoke. Grease is applied to the interior of the housing and the back of the plunger for moving the plunger against the grease cup. Sufficient pressure can be exerted on the grease to force the grease cup out of the passageway in the yoke.

Abstract: An apparatus for extracting screw elements from a screw shaft comprises a frame, a stationary clamp mounted on the frame and disposable between open and closed positions, a carriage mounted on the frame for motion toward and away from the stationary clamp, a movable clamp mounted on the carriage for motion therewith and disposable between open and closed positions, a first drive coupled to the stationary clamp for opening and closing the stationary clamp, a second drive coupled to the movable clamp for opening and closing the movable clamp, and a third drive coupled to the carriage for causing motion of the carriage toward and away from the stationary clamp, wherein clamping of a downstream screw element by the stationary clamp, clamping of an upstream screw element by the movable clamp and one or more strokes of the carriage away from the stationary clamp result in removal of the downstream screw element held in place by the stationary clamp from the screw shaft.

Abstract: A tube pulling apparatus has a body having a hydraulic fluid feeder tube extending to the body to pass oil under pressure therethrough. An inner shaft in the body has a hollow portion slidably mounted over the feeder tube and receives oil in an open area in the inner shaft. An inner piston is connected to the inner shaft and positioned to move the inner shaft responsive to oil pressure from a pair of oil lines. An outer shaft is slidably mounted over the inner shaft and has an outer piston connected thereto and positioned to move the outer shaft responsive to oil pressure from the oil lines. A spool valve is formed between the inner and outer shafts for activating the outer piston upon a predetermined movement of the inner shaft inside the outer shaft and a tube gripping mechanism is connected to both the inner and outer shafts for gripping and pulling a tube therewith by sliding the inner shaft to activate the gripping jaws and sliding the outer shaft to pull the gripped tube.

Abstract: An apparatus for extracting screw elements from a screw shaft comprises a frame, a stationary clamp mounted on the frame and disposable between open and closed positions, a carriage mounted on the frame for motion toward and away from the stationary clamp, a movable clamp mounted on the carriage for motion therewith and disposable between open and closed positions, a first drive coupled to the stationary clamp for opening and closing the stationary clamp, a second drive coupled to the movable clamp for opening and closing the movable clamp, and a third drive coupled to the carriage for causing motion of the carriage toward and away from the stationary clamp, wherein clamping of a downstream screw element by the stationary clamp, clamping of an upstream screw element by the movable clamp and one or more strokes of the carriage away from the stationary clamp result in removal of the downstream screw element held in place by the stationary clamp from the screw shaft.