Abstract: Power clamp with track wiper for protecting anti-friction roller bearings running in close fitting reaction tracks from buildup of powdery substance encountered on certain welding conditions which is carried by the atmosphere and clings to the bearing track leading to eventual binding after prolonged reciprocation. The track wiper is carried on the bearing shaft with loose-fitting relation to each roller bearing but with close scraping relation to the bearing track surfaces.

Abstract: Apparatus for gripping a workpiece including a pneumatic cylinder assembly having a locking valve for selectively locking air in the pneumatic cylinder to thereby maintain the gripping apparatus in clamped engagement with a workpiece.

Abstract: A hydraulic clamp is provided that is suited for fixing a workpiece on the table of a machining center work pallet and the like. In a clamp housing there are arranged a swingable clamp arm and a hydraulic cylinder one before the other longitudinally, the clamp arm being pivotably supported near the lower end thereof to be freely swingable longitudinally, an elastic body is provided to extend from the clamp arm at the middle in height to a constituent member of the hydraulic cylinder so that the clamp arm is pushed back to be inward of the front face of the clamp housing in the absence of hydraulic oil pressure, while the clamp arm is driven forward by a piston of the hydraulic cyinder to be beyond of the front face thereof when sufficient oil pressure is provided to the hydraulic cylinder.

Abstract: A hydraulic clamp for dies of injection molding machines, workpieces of machine tools such as press machines and the like.In the front part of its housing a clamp arm is installed to be longitudinally movable and vertically pivotable and a hydraulic cylinder in the rear part thereof, and there is formed in at least either of a piston rod and the clamp arm a longitudinally extending hole for accommodating a clamp arm pushing spring. An engaging means is provided for engaging the clamp arm with the piston rod at substantially same level with the clamp arm pushing spring. When the hydraulic cylinder is driven to extend, first the clamp arm is pushed forward by the clamp arm pushing spring and, when it is extended, a projected end portion of the clamp arm is pivoted down by the force-magnifying effect of a driving wedge interlockingly connected with the piston rod.

Abstract: A vice has a base fixed to the worktable of a machine, a slider slidable on the base and a fixing-releasing mechanism for selectively fixing the slider to the base and releasing the slider from the base. The fixing-releasing mechanism is provided with an actuator extending through a large hole formed in the base and engageable with the base and the slider. When not applied by pressurized fluid, the actuator fixes the slider to the base, and when applied by the fluid, it releases the slider from the base for the positional adjustment of the slider. The vice also has a piston-cylinder assembly composed of a cylinder tube and a piston assembly slidable in the cylinder tube and surrounding a lead screw in a telescopic manner. When applied by pressurized fluid, the piston assembly as well as the lead screw advances to move a movable clamp element on the slider towards a stationary clamp element fixed on the slider, for clamping a work between both the clamp elements.

Abstract: A pair of air cylinders are provided on the stand for holding a printed circuit board. A first jaw includes a sleeve having spiral slots at opposite ends which register with straight slots in sleeve sections on a second jaw and pins carried on an air cylinder and a piston rod head extend into the aligned slots. A spring normally contracts the air cylinder and air pressure overcomes the spring action to expand the cylinder and pivot the second jaw to a closed position relative to the first jaw for clamping the circuit board. In an alternative embodiment, the air cylinder is integral with a second jaw and a pin carried on the rod head moves in a spiral slot in a sleeve on the first jaw.

Abstract: A clamping apparatus comprises a clamping unit having a pair of clamping plates and clamping plate drive unit, and a fixing unit for fixing the clamping unit to an arbitrary position on a base frame. The clamping unit has a sub base to which one clamping plate and drive unit for driving the other plate are fixed. The drive unit has a leadscrew fixed at its one end to the other plate, and an outer cylindrical member rotatably provided on the sub base and holding the other end of the leadscrew. An inner cylindrical member and a piston are provided in the bore of the outer member. The inner member is threadably fitted over the other end of the leadscrew, and is rotated integrally with the outer one so as to move the leadscrew for a relatively long distance in the longitudinal direction.

Abstract: An improved mechanism for automatically clamping a die tool to a press bed or press ram. The automatic die clamp is self-locking and self-compensating to provide a failsafe operation in the clamped position and thus the mechanism retains the clamp in the clamped position. A ramp is provided to guide the movement of a wedge which wedge movement controls the movement of a clamping member. A spring bias may be provided as an optional feature to assist in the self-locking. Release of the clamp requires the application of an external force to overcome the locking of the teeth.

Abstract: Rotary powered linear actuated clamp having hollow electric motor drive shaft coupled to threaded nut axially retained by reaction roller thrust bearings driving a linear threaded rod having integral toggle linkage actuator guided by anti-friction rollers in linear lateral reaction tracks.

Abstract: A self-locking, fluid-operated, tool clamping device is disclosed. The device provides a double-acting piston formed with a camming surface intermediate its ends. The camming surface is formed with a locking angle with respect to the axis of the piston. A cylindrical clamping pin is guided within the device for movement in a direction perpendicular to the camming surface and is provided with an end surface perpendicular to such direction of movement which engages the camming surface. An output lever pivotably mounted on the device engages the clamping pin at one end and is operable to engage tooling at its other end to clamp the tooling in position. The clamping pin is cylindrical and is free to rotate about its axis so as to reduce localized wear when the device is repeatedly cycled. A spring operably positioned between the lever and the body of the device resiliently biases the lever and the clamping pin toward the release position.

Abstract: A clamping device, for use for example for clamping a tool or workpiece in position in a machine tool comprises a clamping anchor to which a clamping force is applied by a hydraulically operated cylinder. The device also includes a screw operated compensating or back-up unit which acts on the piston of the hydraulic cylinder. The compensating unit is driven by the same hydraulic system as the hydraulic cylinder and when the piston has been moved hydraulically to apply the clamping force to the anchor, a screw component of the compensating unit moves into engagement with the piston to lock the piston in position and maintain the clamping force even if the hydraulic pressure on the piston is then released.

Abstract: A support for sensing the proper positioning of a workpiece and holding the workpiece for a machining operation in response to the proper positioning includes elements for sensing the position of the workpiece at a plurality of locations on the workpiece and a power drive mechanism for operating a clamp to secure the workpiece in the proper position. The sensing elements are connected in series to a power source and are actuated by engagement with predetermined locations on the workpiece when the workpiece is in the proper position. The clamp includes clamp arms which swing laterally away from seats for the workpiece as the clamp arms are moved forward to release one workpiece and accept another.

Abstract: Welding jig apparatus for holding bar stock workpieces in an intersecting and aligned relationship to form a metal grating structure includes a number of elongated radial cams located in a spaced apart relationship to each other and in two parallel rows on a work surface. Workpieces are located between adjacent cam faces of cams opposite one another in the two rows when the cams are in a nonclamping position. The workpieces are clamped into the desired position by arcuate cam surfaces when the cams are rotated to clamping position. The work surface is tiltable to one of a number of work positions to facilitate the welding of intersecting workpieces into the grating structure.

Abstract: A workpiece clamping device with which workpieces of different sizes can be accommodated without having to make extensive system modifications each time the workpiece is changed and with which clamping operations can be performed with a high efficiency. An operating fluid flow-rate detector is provided in a hydraulic circuit between a hydraulic fluid source and a plurality of operating cylinders which drive clamping pawls to detect the flow rate and amount of the hydraulic fluid therethrough. The clamping position is sensed in accordance with the detected flow rate and amount.

Abstract: A high pressure clamping device having a screw vice body, a fixed jaw arranged on one of the ends of the screw vice body, and a slide, which is retained in a guide on the screw vice body and carries a jaw movable relative to the fixed jaw. A reaction block is provided on the other end of the screw vice body to co-operate with a tensioning drive of the movable jaw, which drive consists of a force intensifier or slave unit and a threaded spindle, which can be driven by means of a common crank. The threaded spindle engages in a spindle nut of the slide. The movable jaw is positioned above the force intensifier in the retracted position of the slide and is arranged in the screw vice body between the reaction block and the threaded spindle. The spindle nut which is formed in an extension of the slide, exerts a forward twisting and downwardly directed tensioned pull on the movable jaw in its clamping position.

Abstract: A proximity switch assembly for signalling the location of a movable member at either of opposite end limits of movement relative to a stationary frame includes a compact elongate housing adapted to be mounted on the frame to extend along the path of movement of a power driven member, such as a piston rod, which shifts the movable member between its end limits. A proximity switch is fixedly mounted in the housing and a switch actuating member is mounted for sliding movement over a relatively short distance sufficient to move an actuating tab into and out of actuating proximity to the switch.

Abstract: A method for coining a precision corner break on an oil metering flat for a rotor of a power steering rotary valve is provided. The method comprises the first step of placing a workpiece to be coined in a first floating position set by a clamping and orientating device where the workpiece is generally aligned but adjustable for further coining orientation if necessary. The next step comprises engaging the workpiece with a plurality of circumferentially spaced coining dies. The workpiece floats from the first floating position to a second coining position upon engagement by the dies. The last step comprises coining the workpiece to a precision depth selectively adjustable by adjustment of a motion conversion means. The press assembly includes fixed and movable platens, the movable platen being powered by a power cylinder assembly to direct the movable platen in a longitudinal direction in the press.

Abstract: Air pressure actuated locking power clamp released from static loaded condition by air pressure no greater than locking pressure notwithstanding a differential smaller release pressure area due to piston rod of air cylinder. Highly pressurized needle bearings in straight track portions of the clamp which actuate links connected to a pivoted clamp arm are critical elements in providing unexpected low pressure release. Similar needle bearings in all loaded pivots of conventional toggle clamps provide 100% improvement in ratio of apply force to clamping force.

Abstract: A clamping device which is arranged to clamp a workpiece to a table or stand, and which does not obstruct the clamping region of the table or stand, has a fluid pressure-loaded clamping piston slidably mounted in a main housing with toggle levers on either side thereof bearing against oppositely situated saddle bearings at the sides of the housing. The toggle levers are moved by the clamping piston between an inclined position and an extended position and load a clamping or pulling anchor which is mounted on the housing. The clamping or pulling anchor is pivotally mounted on a clamping lever so that it can swing through a maximum of 180.degree. from a clamping position into a release position in which it is well clear of the workpiece. The anchor is fitted onto a bearing pin, which is disposed in an end, which projects from the housing, of the clamping lever which is pivotally mounted in the housing.

Abstract: A power operated clamp includes a cylinder having a reciprocal piston rod. A hollow clamp body having side plates is aligned with and connected to the cylinder. A clamp arm is pivotally mounted upon the body and in one position is adapted to retainingly engage a workpiece relative to a workpiece support. A linkage is pivotally connected to the clamp arm; the improvement which comprises a series of vertically spaced pairs of longitudinally spaced transverse mount holes extending through the side plates. The mounting of the body includes an upright riser extending between the side plates and has a series of longitudinal similarly spaced apertures corresponding to some of the side plate apertures. Pivot bolts extend through some of the mount holes and riser, whereby the body may be mounted selectively in one of a plurality of longitudinal locations above or below the riser. A rod end is guidably mounted within the body and axially connected to the piston rod.

Abstract: A power clamp assembly is provided having a base, a body rotatable on the base with spaced radial shelves of different heights, a hydraulic cylinder with piston in said body relatively rotatable therein, a hollow rod in said piston adjustable axially thereof and carrying a radial arm adapted to clamp a workpiece against a radial shelf on the body, a clamp structure for clamping said body and cylinder to the base at preselected positions and an inlet connected to a source of fluid pressure for introducing fluid pressure into said cylinder for moving the piston, rod and radial arm to clamping position.

Abstract: A hold down system for use with a generally planar printed circuit (PC) board includes at least one clamp which engages the circuit board and securely maintains it flat upon a circuit board transport mechanism to facilitate the insertion of electronic components upon the board by automatic positioning and insertion apparatus. The movable hold down clamp includes an elongated, generally vertically oriented housing which is positioned beneath the PC board and transport mechanism and is displaced upward above the PC board for engaging the board and pulling it downward upon the transport mechanism as the PC boards are displaced therealong.

Abstract: This invention is a combination automatic and manual vise apparatus selectively operable (1) as a normal manually operated table vise structure; and (2) as a power driven vise structure. The automatic and manual vise apparatus includes a main support base assembly; a manual vise assembly connected to the main support base assembly; and an automatic vise assembly connected to the main support base assembly and the manual vise assembly. The manual vise assembly includes a stationary jaw assembly connected to the main support base assembly and a moveable jaw assembly connected to the stationary vise assembly. The moveable jaw assembly includes a handle member which is rotated to move a jaw member relative to the stationary jaw assembly in a conventional manner. A lock member is used to secure the handle member against a rotation when utilizing the invention as a power driven vise structure.

Abstract: A device for moving gripping jaws into engagement with a workpiece comprising two coaxial fluid cylinders for moving the jaws. A piston fixedly connected with a gripping jaw moves in each of the cylinders. Fluid pressure is applied to opposite sides of the pistons to effect movement of the pistons away and toward each other to thereby move the jaws away and toward each other. A means is provided to insure synchronous movement of the two pistons. The means comprises a rod extending along the axis of the two cylinders. The pistons and the rod have a driving interconnection. The driving interconnection effects rotation of the rod in opposite directions upon movement of the pistons away and toward each other. A bearing assembly located between the two fluid cylinders supports the rod for rotation.

Abstract: The present invention relates to a jointed pneumatic gripping apparatus. The apparatus is characterized in that the intermediate guiding element (8) is elastically deformable during the gripping stage, in particular when passing overcenter beyond the aligned position.

Abstract: A mechanical clamp for releaseably clamping a workpiece against a supporting surface. The clamp includes means for releaseably locking the clamping member in a clamping position without use of an overcenter movement of the clamp toggle links.

Abstract: A versatile robotic gripper is easily and quickly adjusted to grip objects of different geometrical shapes without changing parts and under complete machine control. Opposing jaws have a matrix of axially movable pins each of which is mechanically locked in any axial position. Actuation of an operating mechanism to move the jaws together to grasp an object depresses the pins and they collectively conform to the shape of the object; the jaws retain this shape upon release of the object. A plate is raised to unlock the pins which are returned by springs to a fixed coplanar position.

Abstract: A power operated clamp includes a cylinder having a reciprocal piston rod. A hollow body is aligned with and connected to the cylinder and mounted upon a support. The body includes a pair of spaced side plates at their one ends secured to the cylinder. The piston rod extends into the body. A clamp arm is pivotally mounted upon the body and in one position is adapted to retainingly engage a workpiece relative to a workpiece support. A linkage is pivotally connected to the clamp arm; the improvement which comprises a series of vertically spaced pairs of longitudinally spaced transverse mount holes extending through the side plates. The mounting of the body includes an upright riser extending between the side plates and has a series of longitudinal similarly spaced apertures corresponding to some of the side plate apertures. Pivot bolts extend through some of the side plate apertures and riser, whereby the body may be mounted in one of a plurality of longitudinal locations relative to the riser.

Abstract: A vise adapted to clamp a workpiece includes a support which has a slide surface, first and second jaws movable with respect to one another, and operable to clamp the workpiece, and wherein at least one jaw is slidable along the slide surface. A drive element is in driving connection with at least one jaw so as to at least move that jaw into engagement with the workpiece, and a drive mechanism is operable to drive the drive element. A stressing mechanism is provided for pressing the jaw against the slide surface upon the drive element driving the jaw into engagement with the workpiece.

Abstract: A quick-acting clamping device for clamping tools or workpieces in machine tools comprises a piston which is slidable transversely to the clamping direction and which acts on a toggle mechanism which in turn moves a clamping piece. A pressure plate upon which the toggle mechanism acts is displaceable in the clamping direction in a housing which contains the transverse piston. The fluid under pressure which acts on the transverse piston to activate the toggle mechanism also acts directly on the pressure plate to assist in clamping. Because of the assisting force produced by the pressure plate it is possible for the transverse piston to move the members of the toggle mechanism from starting positions in which they lie at large angles to the clamping direction, that is with a big angular displacement from their dead-center position, in which they initially exert only a small force on the clamping piece.

Abstract: Mechanical amplifying means for valves and other devices which may be used to replace heretofore employed hydraulic jacks capable of transforming a small force traveling a great distance into a large force being motivated over a small distance, and where such amplifying ratios exceed 30 to 1; the mechanical amplifying means consisting of two upper ball bearings wedged tangentially apart by a profiled pushrod which in turn causes a co-sinusoidal, small-distance displacement of a lower pair of ball bearings.

Abstract: A support mechanism for a workpiece cut off by electrical discharges in a travelling wire EDM apparatus. The workpiece is supported between support members provided with clamps. One support member is controllably pivotable around a horizontal axis, while the second support member is displaceable vertically and horizontally along crossed axes. In addition, the second support member may be rotated around a vertical axis. Through appropriate sequential operation of the clamps and relative displacement of the support members, the areas of the workpiece clamped by the clamps may be changed at will, and the cuttings from the workpiece may be supported by one of the clamp members to prevent the fall of the cuttings at the end of a cutting operation.

Abstract: The work clamps of a punch press are mounted in laterally spaced relation on a carriage which may be shifted to cause the clamps to re-position a workpiece relative to the punch. To enable automatic adjustment of the lateral position of the clamps on the carriage, each clamp is adapted to be selectively and automatically locked to or released from the carriage. When released from the carriage, each clamp is adapted to be automatically held in a stationary position so that the carriage may be shifted relative to the clamp to permit re-positioning of the clamp along the carriage.

Abstract: A punch press (20) having a worktable (40) for supporting a worksheet (21), a two axis positioning mechanism for positioning the worksheet under a punching head (34) and universal grippers (44, 46) supported on the worksheet positioning mechanism which can grip either the end or sides of a worksheet (21). The two axis positioning mechanism is formed from a carriage (42) which is movable along the worktable (40) and a cross slide (41) which is mounted from and movable across the carriage (42) to provide the two axis sheet positioning. The grippers (44, 46) are mounted from a T-slot (130) formed in the cross slide (41) and can be moved to different positions to accommodate various sheet sizes. Aligning pins (140, 142, 143, 144) which can be used for aligning worksheets are provided. Aligning pins (140, 142, 143, 144) during operation are retracted beneath the worktable (40).

Abstract: A self-locking hydraulic clamping device includes a hydraulic piston which is notched on one side to form a compound camming surface which drivingly engages a spring-loaded clamping pin moving in a bore normal to the bore in which the hydraulic piston moves, the latter bore preferably extending parallel to the side of the workpiece being clamped.

Abstract: A hydraulically actuatable swing clamp, particularly for the clamping of objects on the table of a machine tool, includes a housing with a piston arranged therein, the latter having a piston rod extending in sealed manner out of the housing. The piston rod carries a clamping arm which in addition to a pure axial clamping motion, performs a swinging motion, effected by a guide device. The guide device includes a normally non-rotatable control bolt arranged on the housing extending into the piston, and at least one cam groove developed in a guide surface between the control bolt and the piston. The cam groove has a helical groove section for the swinging and simultaneous lifting motion, and an axial section for the pure axially directed clamping motion of the clamping arm. A guide member, preferably a ball, arranged on the piston or control bolt, extends into the cam groove.

Abstract: A retracting clamp suited for clamping a die or a workpiece, a die of an injection molding machine in particular, is disclosed, wherein a hydraulic cylinder is provided in the rear part of a clamp housing, a clamp block is carried slidably by a gently tapered underside of the front part of its piston rod, and the clamp block is urged forward by a spring so as to drive it for clamping at its extruded position and, when clamping is over, the clamp block is retracted to its retracted position and a piston is urged toward the clamping position as necessary by a spring, and the position of the clamp block is detectable by means of limit switches.

Abstract: A retracting clamp for dies or workpieces, especially for the die of the injection molding machine, whose clamp arm is installed in the chamber of the clamp housing so as to shift its position between an extended position and retracted position. The clamp arm is driven with a wedge connected to the piston-rod of the hydraulic cylinder. A spring enables clamp arm to hold the clamping force in case of hydraulic oil leakage. There is also provided means for retracting the wedge without failure and means for detecting the positions of the clamp arm.

Abstract: A power operated clamp includes a cylinder having a reciprocal piston rod. A hollow body is aligned with and connected to the cylinder and mounted upon a support. The body includes a pair of spaced side plates at their one ends secured to the cylinder. The piston rod extends into the body. A clamp arm is pivotally mounted upon the body and in one position is adapted to retainingly engage a workpiece relative to a workpiece support. A linkage is pivotally connected to the clamp arm; the improvement which comprises a series of vertically spaced pairs of longitudinally spaced transverse mount holes extending through the side plates. The mounting of the body includes an upright riser extending between the side plates and has a series of longitudinal similarly spaced apertures corresponding to some of the side plate apertures. Pivot bolts extend through some of the side plate apertures and riser, whereby the body may be mounted in one of a plurality of longitudinal locations relative to the riser.

Abstract: A clamping assembly is operated by a piston and cylinder assembly rotatably mounted on a support. A mounting bracket rotatably mounted on the support is provided with a pair of pivotally mounted plates each having a clamping arm and a cam track. The mounting bracket includes an annular shoulder engaging the support; a flange draws the shoulder against the support, thereby selectively locking the bracket and the piston and cylinder against rotation in any of a plurality of rotational positions. A drive rod connected to the piston extends through the support and into an elongate slot in the bracket. A pair of rollers secured to the outer end of the rod are disposed in the cam slots and drive the plates to pivot. The cam slots are specially configured to lock the clamp in a locking position in the event that fluid pressure is lost in the piston.

Abstract: Apparatus for applying force in one direction to an article and restraining movement of the article in the opposite direction. There is provided a reciprocally rotatable link and means to rotate the link connected to a first end of the link and a cam shaft having a first and second cylindrical portion, said first cylindrical portion having a different central axis of rotation than the second cylindrical portion. The first cylindrical portion of the cam shaft is secured to the end of the link opposite the end connected to the rotating means to provide rotational movement of the cam shaft when the link is rotated. A mounting block with a bore therethrough has the first cylindrical portion of the cam shaft passing through the bore. A rotating member pivotal at one end and movable from a first position to a second position has the second cylindrical portion of the cam shaft rotatably secured thereto at the end opposite from the pivotal end.

Abstract: A quick-set hydraulic work holding clamping table assembly including an elongated stationary rigid base member having a front control portion, a pair of stationary transversely spaced flat lateral platen sections flanking an elongated dovetail slide channel, an elongated slide plate member shaped to slidably interfit in the slide channel having its top surface lying in the same common plane as the top surface of the lateral platen sections and forming a movable center platen section. The slide plate member is moved forwardly and rearwardly by a manually operable drive screw coupled to the slide plate member and hydraulic power means are connected to the drive screw for rapidly moving the slide plate member relative to the lateral platen sections to move workpiece engaging jaw pieces to the gripping position responsive to application of fluid pressure to the power means.

Abstract: Air pressure actuated locking power clamp released from static loaded condition by air pressure no greater than locking pressure notwithstanding a differential smaller release pressure area due to piston rod of air cylinder. Highly pressurized needle bearings in straight track portions of the clamp which actuate links connected to a pivoted clamp arm are critical elements in providing unexpected low pressure release.

Abstract: A clamping member is urged to move in a first direction along a path substantially parallel to a work supporting surface in response to the application of a single linear force, such as a fluid actuated motor. Stop means limit the travel of the clamping member in the first direction. In response to continued force applied by the fluid motor, the clamping member is caused to move in a second direction anchoring a workpiece to the work supporting surface.

Abstract: Objects of different sizes and shapes are gripped in a monostable manner by an apparatus which has a single pneumatic power source and has interchangeable jaw assemblies attached to an operating mechanism that provides a linear motion to engage the object. The gripping jaws are selected from a set of three basic types of generic jaws, i.e., nose-shaped jaws and vee-shaped jaws for curved surfaces, and rest button jaws for flat surfaces. Various turbine blades, for instance, are grasped by the airfoil and root using different combinations of these jaw types and have a predictable location relative to the gripping device.

Abstract: A fluid-operated clamping device comprises a support forming a cylinder in which a piston is reciprocatable. A piston rod fixed to piston has a free end projecting beyond the cylinder. A bell crank is pivotally mounted on a portion of the support extending beyond the cylinder. A clamping arm is preferably releasably connected to one arm of the bell crank and has a V-shaped end portion extending transverse to the remainder of the clamping arm adapted to clamp a sheet metal or the like between the V-shaped end portion and a matching V-shaped notch on the upper surface of a stationary anvil. A link comprising at least one spring plate partly divided by a preferably T-shaped slot extending from one side thereinto into two resilient end portions is arranged between the free end of the piston rod and the other arm of the bell crank with one end portion pivotally connected to the free end of the piston rod and the other end portion pivotally connected to the other arm of the bell crank.

Abstract: A quick set hydraulic work holding vise comprising an elongated stationary base plate member, a front stationary jaw fixed to the base plate member at a front end thereof and a rear jaw movable toward and away from the stationary jaw slidably movable along an elongated slide plate member supported for limited movement longitudinally. The slide member has an upwardly facing helical screw threaded channel and the movable jaw carries an interrupted worm screw interlocking device to interfit with the screw threads of the channel for locking the movable jaw longitudinally, which can then be locked against raising or skewing by tightening screw to compress the jaw on the slide plate member. A hydraulic piston is connected to the slide plate member for rapidly moving it and the movable jaw thereon to the gripping position.

Abstract: Clamps or connector elements (13) are secured to the ends of a conveyor b (10) by a pressure applying clamping tool (11) which includes two clamping rails (1, 2) for clamping down the belt end prior to the attaching of the clamps. A single operating lever (9) is used for clamping the upper rail (1) down against the lower rail (2). For this purpose each end of the upper rail (1) is secured to a respective fixed point (2) by a tie rod (3) and a rocking lever (4). Each rocking lever (4) is connected to a spring biased pull rod (5) which is operatively connected to the single operating lever (9) through a toggle type connection.

Abstract: A pneumatically driven clamping device, in particular a machine vice, has a clamping member movable in the clamping direction in a stationary housing and an adjusting arrangement for coarse adjustment of the clamping member in the clamping direction with respect to the stationary housing. Between the adjusting arrangement and the clamping member in a drive housing there is provided a power amplifier with a primary element to which pneumatic pressure can be admitted, an abutment provided at one end of the power amplifier and connected to the adjusting arrangement, and a secondary element movable in the clamping direction at the other end of the power amplifier and acting on the clamping member.

Abstract: A self-locking hydraulic clamping device includes a hydraulic piston which is notched on one side to form a compound camming surface which drivingly engages a spring-loaded clamping pin moving in a bore normal to the bore in which the hydraulic piston moves, the latter bore preferably extending parallel to the side of the workpiece being clamped.