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| Number | Title | Issue Date |
| 7367238 | Test apparatus using a pneumatic collet and method to clamp a bar A pneumatic collet assembly has a housing, a piston, a collet, and ball bearings. The piston is disposed within the housing. A bore within the piston receives the collet. The collet has a base and fingers. The fingers of the collet define a center channel or bore co... | 05/06/2008 |
| 7258348 | Machining fixture for centering and holding workpiece A centering and holding fixture includes a base, a piston disposed within a piston chamber at least partially located within the base, and a radially flexible ring connected to the piston by force transmission apparatus operable to contract and expand the radially f... | 08/21/2007 |
| 7105956 | High precision z-theta stage A high precision z-theta stage having a horizontal translation axis (z-axis) and a rotary axis (theta-axis) parallel with the translation axis comprises parallel spaced apart linear translation stages, a carriage supported between the parallel translation stages, an... | 09/12/2006 |
| 7084533 | Dual-function three-axis positioning system A dual-function, three-axis positioning system having a high precision z-theta state with a horizontal translation axis (z-axis) and a rotary axis (theta-axis) parallel with the translation axis and a second horizontal translation axis (x-axis) comprises parallel sp... | 08/01/2006 |
| 7063356 | Pipe coupling A pipe coupling (10) for joining together the ends of two adjacent pipes includes a housing (12) which defines a generally central bore (13) along a central axis of the housing for receiving the ends of the two adjacent pipes, and a locking arra... | 06/20/2006 |
| 7044477 | Chuck assembly with a cooling mechanism A chuck assembly includes a housing formed with a hydraulic fluid inlet, a sleeve mounted in the housing and formed with an annular groove, a shaft mounted rotatably in the sleeve and formed with a fluid passage, a chuck unit mounted in the shaft, a piston subdividi... | 05/16/2006 |
| 6969073 | Chuck assembly with a sealing member A chuck assembly includes a housing formed with an hydraulic fluid inlet, a sleeve mounted in the housing and formed with an annular groove, a shaft mounted rotatably in the sleeve and formed with a first fluid passage, a chuck unit mounted in the shaft, a piston su... | 11/29/2005 |
| 6938903 | Tool holder for a tool, especially a boring, milling or grinding tool, which can be rotated about a rotational axis The invention relates to a tool holder for receiving a tool, especially a boring, milling, or grinding tool, which can be rotated about a rotational axis and which comprises a clamping shank. In a preferred form of embodiment, said clamping shank comprises a receivi... | 09/06/2005 |
| 6874789 | Low mass rotary motor assembly A rotary assembly for use in processing a tubular member wherein the assembly comprises a gripping mechanism, that is moveable from an open position to a closed position. In the closed position the gripping mechanism engages at least a portion of the tubular member.... | 04/05/2005 |
| 6557860 | Collet retainer Each of a plurality of passages in a fixture has a piston movable therein and cooperating with a collet therein to simultaneously move each collet to its workpiece retaining position and to release each collet from its workpiece retaining position. A rece... | 05/06/2003 |
| 6502835 | Collet holder with rotation mechanism and method A work piece holder with clamping and rotation mechanisms in a support. A holder or brake exists next to a collet and sleeve assembly to restrain the assembly from rotating. Hydraulic pumps and connections operate on the mechanisms for the clamping and ro... | 01/07/2003 |
| 6497417 | Collet chuck provided with a driven movable member which can be driven hydraulically in two opposite directions for operating a collet A collet chuck includes a tubular body and a rotating shaft assembly that is journalled within the tubular body and that defines a frustoconical recess therewithin. A belt pulley is sleeved fixedly on the rotating shaft assembly. A collet is disposed oper... | 12/24/2002 |
| 6473954 | Mounting tool for hydromechanical chuck A mounting tool for a hydromechanical chuck or mandrel of the type which is clamp connected using a pressure medium in order to clamp connecting a shaft or a shaft tool or a working piece, and in which said shaft or working piece is dismantled from the ch... | 11/05/2002 |
| 6224067 | Hydromechanical chuck A hydromechanical chuck intended to be mounted, with one end thereof, in a machine, such as a drilling machine, milling machine, lathe machine etc. and, with the opposite end thereof to releasably hold a shaft tool like a drill, a milling tool, a rotary s... | 05/01/2001 |
| 6173971 | Plunger type rotary chuck assemblies A plunger type rotary chuck assembly includes a main seat in which bearings are mounted for rotatably supporting a main shaft. An inner periphery of an axial hole of the main seat includes a number of fluid passages A number of piston chambers are provide... | 01/16/2001 |
| 6170232 | Quick-change collet chuck An improved quick-change collet chuck used with an existing single lane capping apparatus for gripping and installing container caps during the automated high-volume filling and capping process. The quick-change collet chuck allows quick and effortless sw... | 01/09/2001 |
| 6079918 | Rotary power tool with hydraulically actuated chuck A rotary power tool has a remotely actuated chuck device. A hydraulic actuating system is incorporated in the power tool and is configured to move the chuck device between the gripping and release positions upon hydraulic fluid being supplied to at least ... | 06/27/2000 |
| 5997010 | Collet for a machine-tool chuck A collet is provided to grip a workpiece with a uniformly distributed gripping force. The collet includes a plurlity of circumferentally spaced-apart radial slots extending partly through the collet and at least one opening extending radially all the way ... | 12/07/1999 |
| 5954346 | Hydraulic chuck A hydraulic chuck for a drill string has a hydraulic actuator to operate the jaws. The actuator remains stationery while the spindle is rotated and a pair of skirts attached to the actuator cover the bearing assemblies. The jaws are supported in slots in ... | 09/21/1999 |
| 5887862 | Work support A support rod (3) vertically movably inserted into a housing (2) is urged upward by an advancing spring (4). An annular piston (6) is inserted between a barrel portion (2c) of the housing (2) and an outer peripheral surface of the support rod (3). A colle... | 03/30/1999 |
| 5613692 | Collet A circular flexible collet that provides a 360 degree gripping engagement with a cylindrical workpiece and which is operable by an actuator member incorporated in a workpiece chuck. The collet may be constructed as an internal collet for gripping engageme... | 03/25/1997 |
| 5524909 | Reversed collet A collet arrangement comprises a collet having a taper at its work-piece receiving segmented head. The collet is axially fixed relative to a chuck body by means of a screwed bush. The latter is locked axially to the chuck body by being trapped under the h... | 06/11/1996 |
| 5425544 | Bushingless workhead A bushingless workhead comprises a flexible drill collet inside a flexible chucking collet. The chucking collet has external frusto-conical surfaces on the ends thereof that mate with corresponding frusto-conical surfaces on a pair of pistons. The pistons... | 06/20/1995 |
| 5302062 | Spindle clamping device for machine tool A machine tool is provided with a spindle clamping device for clamping a spindle assembly supported by a spindle head and composed of an outer spindle rotatably supported by the spindle head and an inner spindle disposed inside the outer spindle to be rec... | 04/12/1994 |
| 5192086 | Double ramp, full length grip collet A collet for gripping an associated cylindrical workpiece comprises a pair of actuating rings and a plurality of slide blocks. The slide blocks are held within a housing and feature a pair of opposed slots within each slide block. The slots are oriented a... | 03/09/1993 |
| 5002291 | Hydraulically operated chuck closing mechanism In an automatic screw machine two spindles are mounted coaxially one within the other and are keyed together for rotation in unison in the indexing head of the machine. The inner spindle has a collet on one end thereof; the outer spindle is shiftable axia... | 03/26/1991 |
| 4971339 | Collet type work driver A collet type work driver for holding and driving a workpiece which is located between work centers upon a grinder, lathe or similar machinery, is disclosed. The work driver includes a unique free-floating collet package which rotates essentially free fro... | 11/20/1990 |
| 4791841 | Chucking device A primary piston (19) slides axially on a spindle body (5). Together with two cylindrical bearing surfaces of different diameters (D1 and D2) of the spindle body, the primary piston bounds a primary hydraulic chamber 22) which communicates via a conduit (... | 12/20/1988 |
| 4690415 | Hydraulic nosepiece assembly for a collet closer, and method A method and apparatus are shown for closing a spring collet upon a work piece in a lathe or similar machine tool, in which neither the work piece nor the collet is moved in the longitudinal or axial direction. The collet closer has a nosepiece assembly within... | 09/01/1987 |
| 4672869 | Guiding and feeding device for a work bar in a lathe A hollow spindle (10) comprises a collet (20) at one end and behind the same and spaced from each other two guide sleeves (50,52) for the work bar (W). The rear guide sleeve (52) being the most remote from the collet (20) is axially displaceable in a dire... | 06/16/1987 |
| 4615101 | Tool interface for robot end effectors A tool interface has a rotatable tool changer for holding a tool on the end of a robot arm. The tool changer is a socket chuck having spring jaws in a socket for clamping the tool. A spring actuated sleeve slides longitudinally into wedging engagement wit... | 10/07/1986 |
| 4566705 | Tool retainer having axially and radially movable clamping members The drill spindle of a deep well drilling machine has a sleeve-like extension with a conical internal surface which is complementary to conical external surfaces on an annulus of claws forming part of a clamping device which is inserted into the extension... | 01/28/1986 |
| 4347660 | Quick change drill assembly machine A method and machine for making a quick change drill assembly that can be snapped into and out of a spring-loaded ball-locking chuck. The assemblies are comprised of standard sized adapters having various sized bores to receive drills having shanks of cor... | 09/07/1982 |
| 4296658 | Clamping device for simultaneously machining internally and/or externally, the two ends of a workpiece A clamping device for simultaneously machining, internally and/or externally, the two ends of a workpiece, comprising a headstock housing in which a tubular spindle is mounted to rotate, said spindle being internally provided with two annular pistons slid... | 10/27/1981 |
| 4184691 | Workpiece holder for a vertical broaching machine for broaching annular workpieces A workpiece holder for a vertical broaching machine for broading annular workpieces is particularly useful for simultaneous broaching of two ball-bearing races in the rings of homokinetic joints. A workpiece support, rotatable relative to a baseplate abou... | 01/22/1980 |
| 4155563 | Apparatus for applying high torque levels A novel collet and chuck are disclosed for applying high levels of torque to an article having substantially circular cross-sections about a common axis and sloping sides, such that it cannot be readily gripped by conventional chucks without marring the e... | 05/22/1979 |
| 4094521 | Collet chuck A collet chuck includes a body having a spindle adapter secured to one end and a collet retaining ring at the opposite end for holding a collet in place in the chuck. Stationary slip ring and piston assemblies are mounted to the rotatable body by bearings... | 06/13/1978 |
| 4036484 | Collet locking and operating mechanism therefor Advancing mechanism for a series of fixtures having collets for workpieces are actuated by a fluid actuated double-acting cylinder to lock and unlock the collet. A driven rotatable table has a plurality of equally spaced fixtures mounted thereon which are... | 07/19/1977 |
| 4032162 | Machine tool chuck A high speed hydraulically actuated rotatable chuck for machine tools, permitting the high pressure clamping of elongated work pieces with capacity to be machined simultaneously at opposite ends. Two separate, axially aligned hollow work holding elements ... | 06/28/1977 |
| 3977065 | Crimping machine Apparatus for crimping a fitting onto a hose or the like, including a ram with a slideable piston for moving a set of crimping dies together, wherein the piston has a central passageway extending along its entire length so that a hose can extend through t... | 08/31/1976 |
