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| Number | Title | Issue Date |
| 7980160 | Deep throat chuck jaw system A deep throat chuck jaw system adapted to be used with a lathe with or without a headstock hole is provided. The system includes a set of jaw extension members having an inboard end supported from a face of a master chuck jaw coupled to a lathe chuck. The jaw extens... | 07/19/2011 |
| 7698973 | Machine with spindle and fixture coaxially aligned with the spindle A machine includes a spindle for rotating about a rotating axis, a fixture having a central axis coaxial with the rotating axis, a connecting bar and a vacuum pump. The spindle has a first end surface, an opposite second end surface and a plurality of through holes ... | 04/20/2010 |
| 7516687 | Live center sealing method and system A system and method for sealing a live center is provided. The live center has a spindle disposed, at least in part, within a housing, bearings provide a rolling connection between the spindle and the housing, and a labyrinth seal is mounted to at least one of the s... | 04/14/2009 |
| 7079565 | Systems and methods utilizing laser discharge electrodes with ceramic spoilers Arcing can be minimized in a discharge chamber of an excimer or molecular fluorine laser system by utilizing an improved electrode structure. An electrode structure can include at least one ceramic spoiler positioned near the discharge region of the electrode. An in... | 07/18/2006 |
| 6708382 | Complex tool In a complex tool to be installed on a machine tool capable of turning machining and milling machining operations, a main body is provided, and carries inserts for turning machining, inserts for milling machining and inserts for drilling machining. Turning machining... | 03/23/2004 |
| 6666120 | Facedriver for miniature workpieces A facedriver for holding a miniature workpiece along the axis of a rotary-drive machining device, including a base member, a forwardly-biased centerpoint member, drivepins supported rearwardly by fluid in a fluid-containing chamber in the base member, a g... | 12/23/2003 |
| 6647841 | Device for the end face driving of toothed workpieces The device serves for the end face, angularly true driving of a pre-toothed workpiece (21) clamped between work centers by the rotating work spindle (3) of a tooth flank grinding machine. It takes place by means of a wobble plate (10) connected without pl... | 11/18/2003 |
| 6374713 | Facedriver with fully-adaptable workpiece engagement and enhanced centerpoint force A facedriver for holding a workpiece along the axis of a rotary-drive machining device, including a base member, a forwardly-biased centerpoint member, drivepins supported rearwardly by fluid in a fluid-containing chamber in the base member, a grip member... | 04/23/2002 |
| 6123000 | Centering spindle for a machine tool including an isolation spacer A centering spindle for use with a workpiece which is to be induction hardened includes a generally cylindrical outer housing into which a shaft is positioned and mounted in spaced relation to the housing by a bearing arrangement. The bearing arrangement ... | 09/26/2000 |
| 6092446 | Tailstock assembly mountable on a machine A tailstock assembly mountable on a machine tool and cooperable with a headstock assembly for retaining a workpiece inbetween.... | 07/25/2000 |
| 5957017 | Dead center for machine tools A dead center work support for a machine tool comprises a plurality, preferably at least three concentrically rounded raised radial projections defining the bearing surface of the dead center. The radial projections may be disposed either on the external ... | 09/28/1999 |
| 5916344 | Rod centering device for an automatic lathe feeder A centering device for rods fed to a lathe is designed to be arranged between a rod feeder outlet and a lathe inlet and comprises at least one centering unit (11) having a passage port therein to be run through by a rod to which it supplies lateral contai... | 06/29/1999 |
| 5915428 | Head and tail stocks for woodworking lathes A method of and apparatus for positioning and supporting any of several different elongated workpieces of circular, substantially square, or substantially non-square rectangular cross-sectional configuration so that a central workpiece axis is located alo... | 06/29/1999 |
| 5906230 | Versatile lathe chuck A versatile lathe chuck characterized by a chuck body threaded on the inside for attachment to a lathe spindle and to receive at its work-turning end a variety of fittings and further characterized by a jam or locking screw which threads into the inside o... | 05/25/1999 |
| 5813300 | Precision center with an interchangeable double-arcuate floating collet A precision center for mounting a workpiece for precision machining thereof includes a modified head center, an actuating assembly, a drive assembly, and a double-arcuate floating collet. The actuating assembly is mounted within the modified head center a... | 09/29/1998 |
| 5797605 | Workholding apparatus Workholding apparatus for mounting a workpiece (6) on a machine tool, the apparatus comprising a diaphragm chuck portion (2) and a tailstock portion (4). The chuck (2) includes a backing ring (70) with face portion (74) attached to the diaphragm (44) with... | 08/25/1998 |
| 5732608 | High-precision revolving center The invention relates to a high-precision revolving center (10) for machine tools. Prestressed bearings 40 and 45 are brought into abutment on the one hand against internal 33 and external 25 cylindrical surfaces whose deviation, at any point on the surfa... | 03/31/1998 |
| 5720208 | Spur center apparatus An adjustable spur center device for use with lathe machines. The spur center features easily interchangeable center points, one that can be either extended or retracted without removing the spur center from the lathe or dismounting the workpiece, and the... | 02/24/1998 |
| 5711781 | Apparatus and method for heating an elongated glass An apparatus for heating an elongated glass body, which, for example, may be used as a pre-form for the drawing of glass fibers, includes a rotatable first chuck wherein the first end of the elongated glass body may be rotatably secured. In addition the a... | 01/27/1998 |
| 5613536 | Faceplate for turning objects on a lathe or the like A faceplate for lathes and the like is fabricated of a polymeric material and having a body with a cylindrical surface of substantial depth and indicia marks on the cylindrical surface. The body is turnable just like workpieces on the lathe. The faceplate... | 03/25/1997 |
| 5527400 | Method and apparatus for machining hardened parts apparatus for machining hardened parts A method and apparatus for machining a workpiece from a hardened unmachined part includes the use of non-rotating centers in a turning machine, on which the workpiece is mounted. The shape of the dead centers permits less force to be used in support of th... | 06/18/1996 |
| 5493939 | Universal cylinder mount for use in an engraver A universal cylinder mount for mounting a at least one of a plurality of cylinders between a headstock and a tailstock of an engraver. Each of the cylinders have a mounting aperture at each end adapted to receive a universal cylinder mount associated with... | 02/27/1996 |
| 5373760 | Live center adapter assembly for machine tools A live center adapter assembly is made up of an elongated housing, a center adapter inserted into the end of the housing with a recess in the adapter having a rearwardly tapered inner wall for insertion of a center therein. Axially spaced needle bearings ... | 12/20/1994 |
| 5259156 | Grinding method and clamping device An auxiliary device is disclosed for use with grinding machines to assist in clamping a workpiece and performing the grinding of an internal bore in the workpiece. The device has an exteriorily conical surface extending from an annular projection to one e... | 11/09/1993 |
| 5025689 | Method and apparatus for machining axially symmetrical parts The invention pertains to a process and an apparatus for machining axially symmetrical parts on lathes or rotary broaching machines in which the workpiece is held at each end by an axial clamping pin and a clamping jaw assembly, the clamping pins and clam... | 06/25/1991 |
| 5000068 | Device for aligning, fixing and clamping workpieces A device for fixing and clamping a workpiece comprises an elongated housing having a central bore with a longitudinal central axis, and including a frontal portion having a radial collar, and a rearwardly tapered frontal face opposing the workpiece; a lon... | 03/19/1991 |
| 4988243 | Spring-loaded center A center for maintaining a cutting tool, such as a tapping tool or reamer, in axial alignment with a hole to be worked upon includes an elongated body and a centering pin received by a cavity defined in the body for movement between retracted and extended... | 01/29/1991 |
| 4870786 | Workstock The workstock may comprise a tailstock having a slide which releasably carries a workpart center and which includes a center ejector member independently movable in the slide. The slide is mounted in a housing for axial motion toward and away from a heads... | 10/03/1989 |
| 4869140 | Adjustable precision live center for use with a lathe An adjustable precision live center is provided for use with lathes having a spindle housing slidably interlocking with a shank block by operation of a dovetail tenon mated to a dovetail mortise of said shank block. A spindle is rotatably coupled to the s... | 09/26/1989 |
| 4768791 | Expandable grinding plug A workpiece-holding plug has six sector-shaped segments that expand outwardly in a radial direction when in use and in contact with a lathe center. The segments have tapered outer wall portions which assume a precise cylindrical shape when the plug is exp... | 09/06/1988 |
| 4682445 | Ceramic center for machine tools A ceramic center for a machine tool, having at its one end a bearing portion for supporting a workpiece at its one end on the axis of rotation. The ceramic center is formed of a sintered ceramic mass having a rupture toughness of at least 3.5 MN/m3 | 07/28/1987 |
| 4423651 | Bar feed centrically guiding device for lathe apparatus A hydraulically operated bar stock feeder having a hydraulic circuit in which a hydraulic pump drives a hydraulic motor which in turn operates the bar feeder carriage. The hydraulic pump operates a hydraulic cylinder with a designed live center cup attach... | 01/03/1984 |
| 4370907 | Positive stop center A system for accurately positioning and locating a workpiece in a machine tool, including a master sleeve to be fitted into the standard tapered socket of a machine tool spindle. An interchangeable center housing is fitted into a tapered socket in said ma... | 02/01/1983 |
| 4238979 | Stabilizing device for hollow workpieces A stabilizing device of durable, compressible, material, in which the rotation of the device is coupled to the rotation of the stabilized workpiece in a chuck by the pressing of the device against the base of a bore in the workpiece. The resulting compres... | 12/16/1980 |
| 4151767 | Pipe center assembly The assembly described comprises a shaft mountable in the tailstock and upon the forward portion of which is rotatably supported a hub. One of a plurality of interchangeable frustoconically shaped work centering support members which differ from each othe... | 05/01/1979 |
| 4111082 | Center assembly including oil reservoir for machine tools A center assembly comprising a center and an oil reservoir, the oil reservoir having a leg extending from its lower wall and formed with a bore extending therethrough and with an oil passage having a lower end opened to the bore and an upper end opened in... | 09/05/1978 |
| 4092885 | Center for lathes A center for lathes comprises a tubular casing with its interior serving as an oil chamber, a center rod fitting in the casing and having a conical front end projecting from the casing, front bearings and a rear bearing provided between the casing and the... | 06/06/1978 |
| 4075915 | Centering apparatus A centering tool for rotary machine tools such as lathes and the like having axially aligned stocks comprising an end for engaging a workpiece in such a way that the engagement zone is substantially frusto-conical in configuration so that a workpiece havi... | 02/28/1978 |
| 4033211 | Replaceable flinger for live centers This invention pertains to a replaceable flinger for use with live centers. This flinger is placed as an auxiliary member on the hardened center. In addition to having a forward flinger adapted to withstand the abrasive action of chips, abrasive particles... | 07/05/1977 |
| 4033210 | Live center with hydraulic pressure indicator This invention discloses a heavy-duty live center for a heavy workpiece usually of 10 or more tons. This center includes an outer quill or housing which is movable in a tailstock housing of a lathe or grinder. This live center incorporates the self-aligni... | 07/05/1977 |
