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| Number | Title | Issue Date |
| 8171830 | Machine tool According to one embodiment, a machine tool for machining a workpiece includes: a main spindle that holds the workpiece to rotate the workpiece around a axis; a tool that is configured to machine the workpiece by working together with the main spindle; a headstock t... | 05/08/2012 |
| 7284938 | Tool holder attachment structure A main shaft includes a plurality of elastic engagement pieces arrayed along an outer perimeter of an attachment hole. During and after assembly, the elastic engagement pieces elastically abut at least an outer surface of a tapered shank in a tool holder and deform ... | 10/23/2007 |
| 7213846 | Hydraulic connector block for axially shiftable part A bearing has a mount relative to which can move a part to which hydraulic fluid must be supplied. A connector has a housing fixed to the bearing mount and formed with a central bore centered on an axis and with a radial bore extending outward from the central bore.... | 05/08/2007 |
| 7185573 | Vacuum wheel chuck A wheel chuck assembly includes a support plate having at least one aperture formed therethrough. The support plate is adapted to be mounted upon a lathe spindle. An air conveying device is mounted adjacent to the support plate and is operable to induce an air flow ... | 03/06/2007 |
| 7174956 | Stripper rubber adapter A connector is provided for selectively connecting or disconnecting a stripper rubber to or from drilling head equipment such as a bearing assembly. A generally cylindrical adapter connected to the equipment defines a primary bore to accommodate a down hole tubular.... | 02/13/2007 |
| 7165302 | Spindle device of machine tool and method of replacing spindle A spindle device of a machine tool such as a milling machine and a machining center and a method of replacing a spindle, the spindle device wherein the housing of a spindle head (5) is divided into a front housing (23) and a rear housing (25), a... | 01/23/2007 |
| 7108465 | Jig plate An end surface 820 of a work 80 gripped by a chuck 50 equipped to a main spindle of a lathe-type machine tool is machined, and at the same time has a screw hole 830 formed thereto. The jig plate 60 is provided with a main body 6... | 09/19/2006 |
| 7080433 | Workpiece seat for bar-shaped workpieces A workpiece seat for the machining of bar-shaped workpieces by milling and turning. The workpiece seat has an elongated housing, a spindle rotatably supported in the housing, and an electric direct drive for the spindle. The drive rotor is fixed on the spindle and t... | 07/25/2006 |
| 7056053 | Bolting arrangement including a two-piece washer for minimizing bolt bending A two-piece washer to allow tilting movement of the washer elements. One annular washer element includes a convex annular surface that engages with a concave annular surface of a second annular washer element. When the convex and concave surfaces of the respective w... | 06/06/2006 |
| 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 |
| 7039992 | Lathe A lathe 1 comprises a bed 5, a headstock 10 having a housing 13 and a support base 14, a main spindle 11, a first tool rest 44, and a second tool rest 50. The support base 14 is formed so as to have a co... | 05/09/2006 |
| 7021183 | Drive housing for machine tool drives In order to provide a drive housing for machine tool drives which offers the possibility, with simple production technology, of not being subject to any restrictions whatsoever with respect to the recess to be provided, it is suggested that this have a plurality of ... | 04/04/2006 |
| 6978706 | Machine tool spindle liners and methods for making same A spindle liner for a turning machine has an elongated polymeric member sized to fit within the inner diameter of a spindle and further has a bore through the polymeric member sized and shaped to receive a given size bar stock. The spindle liner may be installed wit... | 12/27/2005 |
| 6918327 | Actuator for workpiece holding device A power chucking system 10 comprises a chuck mounted on a headstock, the chuck with its jaws being caused to rotate by rotation or the machine spindle 6. The spindle 6 may be engaged with the pulley 1 in order to rotate a work piece retai... | 07/19/2005 |
| 6913268 | Rotation-independent actuation of a machine element The invention relates to rotating machine element that contains a mechanism actuated by a fluid pressure. The aim of the invention is to allow for a supply of actuation fluid also during the rotation. To this end, a non-rotating control element (2) is mounted... | 07/05/2005 |
| 6909211 | Rotary electric machine with forced ventilation The present invention provides an electric machine with forced ventilation, the machine comprising: a rotor capable of rotating about an axis of rotation; a stator within which the rotor can rotate, said stator com... | 06/21/2005 |
| 6817273 | High precision spindle assembly, and method of forming same An improved spindle assembly (23) is adapted to be mounted in an opening (22) provided on a rotatable head (20) of a multi-spindle machine tool. The improved spindle assembly includes a tubular main spindle part (26) that is adapted to be... | 11/16/2004 |
| 6772660 | Means for directly coupling main motor shaft to working machine Disclosed herein is means for directly coupling a main motor shaft to a working machine with a coupling head as an intermediate component. The machine unit assembled according to the present invention does not require rechecking of dimensional deviations after compl... | 08/10/2004 |
| 6666581 | Bearing for multi-spindle bar machine A multi-spindle automatic bar machine having a housing, a plurality of spindles, each with a collet at one end, and mounted with a rotating head which is carried by the housing, the rotating head being adapted to index the spindles through a plurality of ... | 12/23/2003 |
| 6612208 | Spindle nut holder for a spindle gear for driving levers Spindle nut holder for a spindle gear which drives a lever and functions under extreme conditions such as in a vacuum, under radiation exposure, and at a temperature close to absolute zero. The spindle nut holder includes a spindle nut and strip-shaped li... | 09/02/2003 |
| 6560846 | Method and apparatus for effecting interference fit of two parts by accelerating one of the parts Method and apparatus for effecting an interference fit of a first part and a second part, wherein a thrust force is applied to the second part in a direction toward the first part to thereby accelerate the second part for applying a kinetic energy to the ... | 05/13/2003 |
| 6553876 | Detachable, high precision and rigid connection of a tool, workpiece or gauge holder to the nose of a machine tool spindle Interface between the spindle nose (1) and the fixture flange (11) of interchangeable tool, gauge or workpiece holder (7) of a machine tool with a shortened centring taper (8) on the underside of the flange of the holder (7), said taper being formed as an... | 04/29/2003 |
| 6450073 | Bearing for multi-spindle bar machine A multi-spindle automatic bar machine having a housing, a plurality of spindles, each with a collet at one end, and mounted with a rotating head which is carried by said housing, said rotating head being adapted to index the spindles through a plurality o... | 09/17/2002 |
| 6389939 | Multiple-spindle bar machine A multiple spindle bar machine is disclosed including a cylindrical spindle carrier assembly supporting a spaced apart array of spindle bearings. Workpiece holding spindles are rotatably journaled in the spindle bearings. A hollow spindle drive shaft exte... | 05/21/2002 |
| 6367359 | Boring and contouring apparatus A tool head or "head assembly" having on-board logic (1) for being mounted on a rotatable spindle of a machining center, as a boring machine, (2) for being rotated about a primary axis of spindle rotation (PRA), and (3) supports a tool as a boring bar at ... | 04/09/2002 |
| 6332386 | Transmission mechanism for spindle head of five-axis machine tool A transmission mechanism for spindle head of five-axis machine tool comprises three axes which are driven simultaneously. The transmission mechanism comprises a spindle transmission unit, a B-axis transmission unit and a C-axis transmission unit, and each... | 12/25/2001 |
| 6302006 | Machine spindle A controlled spindle drive is utilized for producing an axially acting clamping force for the purpose of clamping/releasing tools or workpieces on the work spindle of machine tools. A two-part spindle shaft is enclosed coaxially by a ring which can be dis... | 10/16/2001 |
| 6272956 | Device for holding a workpiece or a bar of material to be machined A modular device for holding a workpiece or a bar of a material to be machined in a gripping chuck of a rotating spindle of a machine tool. A gripping chuck is actuated by a thrust tube coaxial with the spindle. To tighten the chuck, various forces are ex... | 08/14/2001 |
| 6182544 | Stepless cutter feeding mechanism for a lathe A lathe is provided with a stepless cutter feeding mechanism for cutting a workpiece at a constant linear cutting speed. The lathe includes a cutter seat that carries a cutter for cutting the workpiece and a motor for driving a main shaft that carries the... | 02/06/2001 |
| 6085622 | Machine Tool In order to improve a machine tool comprising a machine frame with an underframe and a machine column seated on this and having a support ring, a support mounted on the support ring for rotation about an essentially vertical axis, several workpiece receiv... | 07/11/2000 |
| 6038948 | Workpiece spindle device for a machine tool A workpiece spindle device for a machine tool having a drivable workpiece spindle in a spindle housing and including a hydraulic oil supply device with a non-rotating housing portion connected to the spindle housing. An oil control device is connected to ... | 03/21/2000 |
| 5941146 | Work spindle A work spindle for a machine tool. The work spindle has a spindle guard tube, a clamping arrangement, a clamping force generator, which is arranged on the spindle guard tube and operates the clamping arrangement, and which has at least one first cylinder ... | 08/24/1999 |
| 5927169 | Lathe draw tube adaptor A draw tube adaptor for insertion into the draw tube of a lathe. The draw tube adaptor includes a sleeve, and carried within the sleeve are a series of bushings spaced apart from one another. The bushings have bores sized to accommodate the diameter of th... | 07/27/1999 |
| 5697270 | Multiple-spindle machine tool A compact multiple-spindle machine tool has a spindle support which is rotatably mounted on a machine frame. Several work piece spindles are carried by the spindle support and may be positioned in various rotational positions when the spindle support is r... | 12/16/1997 |
| 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 |
| 5325749 | Machine tool having a quick release draw tube and jaw chuck adapter A machine tool having a quick release draw tube includes a headstock with a spindle. A draw tube is slidably supported within the spindle and includes inner and outer surfaces. The draw tube includes a series of circumferentially spaced holes on the outer... | 07/05/1994 |
| 5170686 | Turning machine A turning machine has a spindle box, a workpiece spindle rotatably supported in the spindle box and having at its on end a clamping device for clamping rod-shaped workpieces, a tool holder arranged displaceably transversely to an axis of the workpiece spi... | 12/15/1992 |
| 5062330 | Machine tool with a cooled motor spindle In order to improve a machine tool with a motor spindle, including a main motor integrated into a work spindle coaxially with the spindle axis, the main motor, for its part, comprising a rotor and a stator, and with a cooling device for supplying cooling ... | 11/05/1991 |
| 5054342 | Pipe machining apparatus A pipe machining apparatus includes a tool carrier, with a frame attachable to a pipe for rotatably mounting the tool carrier. The tool carrier is circumferentially rotatable about the pipe and carries a tool for performing cutting or machining operations... | 10/08/1991 |
