Class / Patent application number | Description | Number of patent applications / Date published |
269025000 | Cylinder-piston means directly moves jaw(s) | 22 |
20080203636 | Apparatus for holding disk-like objects - An apparatus for holding disk-like objects, in particular semiconductor wafers ( | 08-28-2008 |
20100301535 | FLOATING-TYPE CLAMPING DEVICE - A floating-type clamping device includes a pneumatic cylinder unit, a pressing plate, a floating plate, two grips, an air supply pipe unit, and a safety control unit. The pneumatic cylinder unit includes at least one cylinder. The floating plate includes a plate body, a plurality of nozzles, and an air passage disposed inside the plate body and communicated with the nozzles. The plate body cooperates with the pressing plate to clamp a plate material when the pressing plate moves downward. The air supply pipe unit is connected and supplies compressed air to the pneumatic cylinder unit and the floating plate. The safety control unit is connected to the air supply pipe unit and is operable to block or permit the flow of the compressed air into at least one of the cylinder and the air passage. | 12-02-2010 |
20110133381 | CLAMP DEVICE - A clamp device has a grip member for gripping the inner peripheral surface of a hole in a workpiece, a clamp rod having a tapered shaft portion that is fitted into and engaged with the grip member, a hydraulic cylinder for driving the grip member and the clamp rod forwards and backwards in the axial direction, and a main body member to which the above elements are mounted. A tubular cylindrical main body portion projecting upwards is provided at the center portion of an upper half portion of the main body member. The outer diameter of this tubular main body portion is set less than or equal to three times the outer diameter of the grip member in the unclamped state, and, in the unclamped state, the upper half portions of the grip member and the tapered shaft portion are made to project outward from the upper end of the tubular main body portion. | 06-09-2011 |
20110163488 | MACHINE TOOL - A machine tool includes: a hydraulic pump that supplies pressure oil; a fixture plate that positions a workpiece; a fixture base that detachably holds the fixture plate and that moves relative to a tool during machining; a hydraulic cylinder performs an attaching/removing operation for attaching or removing the fixture plate to or from the fixture base; an accumulator that accumulates the pressure oil from the hydraulic pump and that supplies the pressure oil to the hydraulic cylinder; and a manual valve that is manually switched to supply the pressure oil in the accumulator to the hydraulic cylinder to thereby control the attaching/removing operation of the hydraulic cylinder. | 07-07-2011 |
20120025436 | WELDING UNIT FOR WELDING RAILS - A welding unit for welding two rails of a track is equipped with clamping jaws intended for lying against a rail web. The clamping jaws each have a sliding surface, which is at a distance from a contact surface in the transverse direction of the rail and is arcuately curved with respect to a cross section extending such that it is normal to a neutral axis of the rails. The jaw mount, intended for fixing the clamping jaw, has a sliding surface, which is curved in a way corresponding to the sliding surface of the clamping jaw, and so the clamping jaw is movable along the sliding surfaces in relation to the jaw mount. | 02-02-2012 |
20120104674 | HYDRAULIC CLAMPING DEVICE - A hydraulic clamping device comprises clamping piece supported in a structure. In addition, the clamping device comprises a hydraulic cylinder having a longitudinal axis and including a cylinder housing fixedly connected to the structure. Further, the clamping device comprises an intermediate piece axially disposed between the piston and the clamping piece. The hydraulic cylinder is adapted to exert a force along the longitudinal axis against the clamping piece. | 05-03-2012 |
20120112397 | Linkage Clamp - A clamp has a powered actuator that includes an arm moving between a first and a second position. A linkage mechanism has a link and a base. The link and base are pivotally connected with one another. The link couples with the arm of the cylinder. The bracket couples with the actuator and the base. The bracket is movable along the base for adjusting the angle opening between the link and the base. | 05-10-2012 |
20130032982 | Workpiece-holding unit for installation on machining centers for connecting rods - A workpiece-holding unit for installation on machining centers for connecting rods, comprising a crosspiece which is adapted to be rotatably supported about its axis in front of a machining head of the machining center and has internal, hydraulic longitudinal ducts which communicate with respective hydraulic outlets on the main faces of the crosspiece and are connected to hydraulic feed means. Several workpiece-holding tools are installable on the main faces of the crosspiece and are provided with positioning mechanisms and locking mechanisms for at least one connecting rod, which are hydraulically operated via respective hydraulic lines leading at positions aligned to said hydraulic outlets. | 02-07-2013 |
20130113146 | CLAMP DEVICE - A grip member is inserted into an insertion hole of a cylindrical clamp body and is capable of extending outwards to grip the inner circumferential surface of an aperture of an article. A clamp rod is engaged with the grip member; a driving mechanism capable of driving the clamp rod forwards and backwards; a seating surface formed at the top end of the cylindrical clamp body; a case member supporting the cylindrical clamp body movably forwards and backwards; a driving mechanism capable of raising an lowering the cylindrical clamp body; and a lock mechanism having a cylindrical member into which the cylindrical clamp body is inserted so as to slide freely and capable of locking the outer circumferential surface of the cylindrical clamp body by elastically deforming the cylindrical member so as to reduce its diameter. | 05-09-2013 |
20130168911 | ROTATING CYLINDER - A rotating cylinder includes and a main body, a piston head, a piston rod and a guide assembly. The piston head slidably is received within the main body. The piston rod partially received within the main body, the piston head is fixed to the piston head, the piston rod defines one or more guiding groove adjacent to the piston head, the guiding groove includes a straight portion, a first helix portion and a second helix portion, the straight portion extends axially toward the piston head, the first helix portion curvedly extends away from the straight portion toward the piston head, the second helix portion curvedly extends from an end of the first helix portion toward a direction away from the piston head and the straight portion. The guide assembly is mounted on the main body and includes one or more guiding member slidably engaged with the guiding groove. | 07-04-2013 |
20140183805 | CHUCK BODY, MACHINE CENTER, AND METHOD FOR GRIPPING A WORK OBJECT TO BE PROCESSED - A chuck body includes a base, a fixed gripper finger, a cylinder mount, a slide, and a movable gripper finger. The base includes a planar member. The fixed gripper finger is fixedly provided on the planar member at a position spaced from a longitudinal end of the planar member. The cylinder mount is mounted on the planar member, and includes a cylinder and a linear actuator operably engaging the cylinder to linearly move the cylinder in a longitudinal direction of the planar member toward and away from the fixed gripper finger. The slide is secured to a distal end of the cylinder and is integrally movable with the cylinder. The movable gripper finger is secured to the slide and positioned to cooperate with the fixed gripper finger to grip an associated work object when moved toward the fixed gripper finger by the linear actuator. | 07-03-2014 |
20140191456 | ACTUATOR AND CLAMP DEVICE USING SAME - A first piston for high load is inserted into a housing so as to be movable vertically, and a second piston for low load is inserted into a cylindrical hole of the first piston so as to be movable vertically. An output portion projects from the second piston to above the housing. A first spring for high load and a second spring for low load are mounted in a spring chamber defined by both pistons and. Both springs and are mounted so as to urge the first piston and the second piston upward. A switching mechanism disposed in the pressure fluid chamber at a side opposite to the spring chamber, connects the first piston selectively to the housing or the second piston. | 07-10-2014 |
20140319747 | FIXTURE FOR EJECTOR PINS - A fixture for a plurality of ejector pins includes a base, a cylinder, a plurality of clampers, and a rear board. The base includes a fixing member. The cylinder is mounted to the base. The plurality of clampers is located between the cylinder and the fixing member to fix the plurality of ejector pins. The rear board is located on one side of the base for positioning the plurality of ejector pins. The plurality of clampers is pressed by the cylinder to move to retain the plurality of ejector pins. | 10-30-2014 |
20140367903 | UNCLAMP FEEDBACK UNIT - The disclosure generally relates to unclamp sensing feedback devices for clamping or holding devices in automatic production lines more specifically to a link clamp assembly. Further, the disclosure also provides the method of achieving feedback to sense fully unclamped condition of the link clamp cylinder. | 12-18-2014 |
20150035214 | HOLDING DEVICE - A holding device includes a main body defining a channel, a supporting assembly coupled to the main body, a plurality of pistons positioned on the main body, and an adjusting assembly positioned in the main body. The substance channel includes a main channel and a plurality of first sub-channels defined from a side of the main channel and communicating with an outside. An end of each piston received in a corresponding first sub-channel, the other end coupling to the supporting assembly. The adjusting assembly is received in an end of the main channel capable of being inserted into the main channel. The plurality of pistons is configured to drive the supporting assembly to move away from the main body. | 02-05-2015 |
20150069689 | Device for Clamping a Workpiece on a Tool - A device for clamping a workpiece on tool includes a ram and a clamp, the ram being selectively actuated by a pressurized fluid. The ram includes a body which, when in use, is secured to the tool and a slide mounted such that it can slide with respect to the body. The clamp is hinged with the slide about a pivot axis. The body includes a front face beyond which the clamp projects when it is in a clamping position in order to clamp the workpiece. In addition, the clamp has a release position which it reaches at least partially by pivoting about the pivot axis. The slide includes a piston and a rod that are assembled to one another. The pivot axis is offset by a predetermined distance with respect to the axis of the rod in the direction of the front face. | 03-12-2015 |
20150097325 | Locking Pin Clamp - A pin clamp is provided, comprising a housing having a bore extending therethrough, therein defining an axis. A shaft in sliding engagement with at least a first portion of the bore comprises an axial hole. A piston coupled to the shaft is in sliding engagement with a second portion of the bore. A clevis has a clevis base and two clevis prongs extending along the axis. The clevis base an axial hole and first and second radial clevis holes, wherein the first and second radial clevis holes are opposed to one another by 90-degrees. The axial hole accepts the shaft, and the clevis base is coupled to the shaft in one of four 90-degree-opposed positions by a screw passing through one of the first and second radial clevis holes and the axial hole. Each clevis prong has a radial prong hole. A locating pin has a mounting portion configured to be coupled to the housing in one of the four 90-degree-opposed positions. A clevis pin selectively couples a tang end of a clamping arm to the clevis through radial prong holes of the clevis prongs. The clamping arm extends and retracts based on a position of the shaft and an engagement between an actuator pin coupled to the housing and a slot in the clamping arm. | 04-09-2015 |
20150097326 | Pin Clamp Having Integrated Check Valve - A pin clamp is provided, comprising a housing having a bore extending therethrough, therein defining an axis. A shaft in sliding engagement with at least a first portion of the bore comprises an axial hole. A piston coupled to the shaft is in sliding engagement with a second portion of the bore. A clevis has a clevis base and two clevis prongs extending along the axis. The clevis base an axial hole and first and second radial clevis holes, wherein the first and second radial clevis holes are opposed to one another by 90-degrees. The axial hole accepts the shaft, and the clevis base is coupled to the shaft in one of four 90-degree-opposed positions by a screw passing through one of the first and second radial clevis holes and the axial hole. Each clevis prong has a radial prong hole. A locating pin has a mounting portion configured to be coupled to the housing in one of the four 90-degree-opposed positions. A clevis pin selectively couples a tang end of a clamping arm to the clevis through radial prong holes of the clevis prongs. The clamping arm extends and retracts based on a position of the shaft and an engagement between an actuator pin coupled to the housing and a slot in the clamping arm. A check valve is further associated with a housing, wherein the check valve is configured to selectively maintain a pneumatic pressure associated with one of a first axial side and a second axial side of the piston when a source of pneumatic pressure is removed from the one of the first axial side and second axial side of the piston. | 04-09-2015 |
20150102544 | CLAMP FOR LOCKING PIPES AND/OR CYLINDRICAL BODIES IN GENERAL - An improved clamp for locking pipes and/or cylindrical bodies in general, including at least one first jaw that is associatable with a supporting structure, a second jaw, and an articulation means interposed between the first jaw and the second jaw in order to allow the relative rotation of the two jaws about a tilting axis, between an open configuration and a closed configuration in which the two jaws form a substantially circular locking seat. The particularity of the present invention resides in that the clamp includes an elastic means that is functionally connected to the two jaws and is adapted to facilitate their opening and/or closure. | 04-16-2015 |
20150352676 | DEVICE FOR CLAMPING A TURBINE BLADE - A device for clamping a turbine blade ( | 12-10-2015 |
20160023254 | FEEDING DEVICE AND OBJECT DRIVING DEVICE - To provide a feeding device capable of driving an object with high accuracy while holding the object and controlling its attitude and capable of improving durability by separating a holding device and a driving device from each other, and an object driving device. The feeding device movably disposed through a cover device to face a work region shielded by the cover device, for holding an object, includes: a first rotary saddle that is rotatable about a first axis; a second rotary saddle disposed on the first rotary saddle and rotatable about a second axis perpendicular to the first axis; a holding device that holds the object; a first driving device disposed outward of the cover device with regarding the work region to rotate the first rotary saddle; and second driving device disposed outward of the cover device with respect to the work region to rotate the second rotary saddle. | 01-28-2016 |
269026000 | With equalized pressure on plural (nonopposed) jaws | 1 |
20110115144 | METHOD AND APPARATUS FOR APPLYING AXIAL STRESS FOR WELD TESTING - A method for testing the integrity of a weld on a pipe includes the application of an axial stress on the weld during the integrity test. An assembly for performing the method is also provided, wherein a pair of circumferential supports are provided on the pipe, on opposite sides of the weld, and between which extend axial force applying devices. In one aspect, the invention is used to test a weld securing a flange to a pipe. The invention also provides novel circumferential clamps for securing to the exterior of pipes. | 05-19-2011 |