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| Number | Title | Issue Date |
| 8156850 | Tailstock control device A tailstock control device supports an object to be machined by driving and controlling a servo motor which drives a driving system of a tailstock having a spring member in forward and backward directions, to cause a tailstock center connected to the tailstock to co... | 04/17/2012 |
| 7395743 | Lathe spindle unit and lathe apparatus A lathe spindle unit is provided with: a rotatable spindle having a cam follower, and a holding section for holding a work piece; a drive source for rotatively driving the spindle; and a driven rotation shaft that has a cam and that is rotatively driven by the drive... | 07/08/2008 |
| 7316173 | Tilt away tailstock attachment for lathes Woodturners who make bowls frequently find that the unoccupied tailstock limits the path of the tool handle. The normal solution is to manually remove the tailstock from the lathe and set it on the floor or a work bench. Tailstocks can be heavy and manual removal an... | 01/08/2008 |
| 7314315 | Gearbox for cold metal cutting machine Improved serviceability of cold metal cutting machines is accomplished in a modified gearbox structure enabling several annular components that are conventionally attached by press-fit to be attached instead by slide-fit for easy removal and replacement, eliminating... | 01/01/2008 |
| 7296331 | Apparatus and method for centering a workpiece on a machine tool A method is provided for centering a workpiece on a metal shaping machine. First and second guide plates have respective first and second aligned bores therein for supporting a centering pin mounted therein for axial movement between a retracted position and a use p... | 11/20/2007 |
| 7281460 | Positive lock tail stock support for lathe The present invention generally relates to the field of woodworking tools and particularly to an indexing assembly for a lathe. An aspect of the present invention is directed to a lathe, including a frame; a bed coupled with the frame; a head stock configured for me... | 10/16/2007 |
| 7266871 | Machine tool To provide a machine tool in which supporting stiffness of a tool post is increased, thereby enabling improvement in machining accuracy. When seen in a Z-axis direction, a tool post 5 includes: a supporting member 30 having a pair of left and right leg... | 09/11/2007 |
| 7240412 | Composite lathe To provide a composite lathe enabling the overlapping of movement areas without lowering supporting stiffness of a tool post, and thus realizing enhanced machinability. An XY supporting plane A by which a tool post 5 in is supported to be movable in an X-axis... | 07/10/2007 |
| 7237310 | Composite lathe To provide a composite lathe enabling downsizing of a machine main body and realizing an enlarged machining area. A cutting point “c” of a tool post 5 is positioned vertically under a straight line connecting axes “a” of a first spindle headstock 3... | 07/03/2007 |
| 7168899 | Apparatus and method for centering a workpiece on a machine tool An apparatus is provided for centering a workpiece on a machine tool that includes first and second guide plates having respective first and second aligned bores therein for supporting a centering pin mounted therein for axial movement between a retracted position a... | 01/30/2007 |
| 7165483 | Apparatus and method for clamping and positioning workpieces of different length between two centers In an apparatus (10) for clamping and positioning workpieces (36) of different length between two centers (26,28), comprising a base (14) with at least one linear guide (18), a first carriage (20) displaceable in a linearly ... | 01/23/2007 |
| 6949907 | Method and apparatus for extending the torque range of a stepper motor An apparatus including a stepper motor for actuating a moveable element of the apparatus. The maximum torque that can be generated at each step is a function of the voltage supplied to the motor. In some applications, however, torque greater than the nominal maximum... | 09/27/2005 |
| 6901829 | Turret lathe with a clutch for operating between chamfering and turning operation modes A turret lathe includes a bed, a headstock mounted on the bed, a first slide mounted slidably on the bed, a second slide mounted slidably on the first slide, a spindle journalled to the headstock, a chuck mounted on the spindle, a tailstock mounted on the second sli... | 06/07/2005 |
| 6827631 | Center support grinding method, center support grinding machine, and centering method for the centers thereof To provide a grinding machine and a centering method for the centers thereof in which the requisite space for the center support rotating mechanism for a workpiece and the in-feed mechanism is reduced to facilitate miniaturization and in which it is easy to secure t... | 12/07/2004 |
| 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 |
| 6202520 | Method and apparatus for machining highly concentric parts Methods and apparatus for machining highly concentric surfaces on a workpiece. In a pre-operation, locating features are machined into either end of a workpiece. These locating features are subsequently pulled apart so as to induce tension in the workpiec... | 03/20/2001 |
| 6178856 | Lathes The present invention therefore provides in one aspect a lathe including: a headstock comprising a lathe spindle; a tailstock; and a lathe bed wherein the lathe bed is mounted to be rotatable in a horizontal plane about a vertical axis. In a second aspect of the in... | 01/30/2001 |
| 6134998 | Part positioner and holder for lathes An electromagnetic workpiece positioning and holding device is mountable on a metal working lathe for pulling bar stock to a working position relative to metal working tools and/or for holding and stabilizing an outermost end portion of a workpiece during... | 10/24/2000 |
| 6125727 | Tail feed for engine lathe A method and related structure for operating an engine lathe comprising performing the desired lathe operation by automatically translating the tailstock toward a workpiece and automatically stopping said translation at predetermined distances.... | 10/03/2000 |
| 6122998 | Force control method for a bar feeder of a lathe A force control method for a bar feeder supporting a workpiece in a lathe, including seizing the workpiece by a Z-axis spindle of the lathe and the bar feeder, performing position control by the Z-axis spindle of the lathe, and performing force control by... | 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 |
| 6058988 | System of holding workpieces for a carving machine A machine for carving workpieces having substantially similar configurations generally including a base member, means disposed on the base member for retaining at least one workpiece thereon, means for rotationally indexing the workpiece disposed on the r... | 05/09/2000 |
| 6026720 | Cue servicing and repair apparatus An apparatus for servicing and repairing cues including a collet mounted to a rotation member and having a collet body defining a passage including a generally conical surface, at least two collet jaws formed of a flexible resilient material and slidably ... | 02/22/2000 |
| 6000447 | Sliding banjo cam lock for lathe A mechanism for clamping a banjo (10) toolrest or toolrest bracket to a lathe bed (51) which makes use of a sliding cam (40) which is actuated by a drive shaft (18). The cam is supported independently of the drive shaft by a support block (12) resting on ... | 12/14/1999 |
| 5964016 | Long bar member machining apparatus In the case where a product having a free-curved surface is obtained, a machining work is performed by separate machine tools. Therefore, works of attaching and removing a half-machined product are necessary. Consequently, a lot of working time and labor ... | 10/12/1999 |
| 5941291 | Workpiece retaining means for carving machine A machine for carving workpieces having substantially similar configurations generally including a base member, means disposed on the base member for retaining at least one workpiece thereon, means for rotationally indexing the workpiece disposed on the r... | 08/24/1999 |
| 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 |
| 5619895 | Tailstock for a lathe providing hydraulic axial length compensation A tailstock for a lathe. The tailstock includes a housing, a rigid sleeve mounted in the housing and being both rotatable and axially displaceable with respect to the housing, a center integral with the sleeve and disposed at a front end of the sleeve for... | 04/15/1997 |
| 5575041 | Resiliently yieldable tail stock device for use in a numerically controlled lathe A resiliently yieldable tail stock device for use in a numerically controlled lathe comprises a body slidable along a bed toward and away from a spindle, the slidable body having a bore and a passage hole each formed therethrough in an axial alignment wit... | 11/19/1996 |
| 5535652 | Lathe apparatus The invention comprises an automatic lathe apparatus adapted to be programmed for automatically cutting work pieces into contours with a pair of radial saw blades. The apparatus has an elongated frame with a center drive mechanism movably mounted on the f... | 07/16/1996 |
| 5525092 | Device for preventing idle rotation in cylindrical ingot grinder When a cylindrical single crystal ingot terminating in generally conical parts at the opposite ends thereof is machined with a cylindrical grinder which is adapted to support the ingot in place by fastening the conical parts of the ingot to a spindle side... | 06/11/1996 |
| 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 |
| 5402606 | Roll grinder A dual roll grinder employs a first and second work station including a dual drive headstock disposed therebetween. A grinding assembly and the dual drive headstock translatably move along a bed to engage rolls in either of the two stations. This permits ... | 04/04/1995 |
| 5282402 | Machine tool tailstock A machine tool comprises a base, a spindle operably associated with the base, a work holder operably associated with the spindle for securing a workpiece to the spindle, and a tailstock operably secured to the base. The tailstock includes a slideway and a... | 02/01/1994 |
| 5239901 | CNC lathe A CNC (computer numerical control) lathe includes a tailstock feed mechanism consisting of a feed hopper and an air cylinder for feeding a short workpiece, and a secondary tool turret having a feed chuck and a set of rear end cutting tools for processing ... | 08/31/1993 |
| 5067534 | Spindle drive for a veneer lathe The invention concerns a spindle drive for a veneer lathe. In view of reducing the mobile masses of the drive gear equipment making the lathe better adaptable to different log lengths, the opposite spindles in the lathe are provided with drive motors of t... | 11/26/1991 |
| 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 |
| 4995434 | Woodworking lathe tailstock assembly A tailstock assembly for a wood-turning lathe which facilitates the drilling of deep bores into long slender wooden workpieces. The tailstock includes a chuck grasping the tail end of the workpiece, said chuck having an axial center bore therethrough prov... | 02/26/1991 |
| 4926723 | Machine tool auxiliary function hydraulic system An auxiliary-function hydraulic system is provided for a computerized numerical control (CNC) machine tooling unit. Hydraulic power is provided for locking collet or chuck to an open or closed position and providing an affirmative collet-open and/or colle... | 05/22/1990 |
