Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7331099 | Machine tool and method for the correction or compensation of different tool lengths in a machine tool In order to provide a machine tool with at least one movable slide, which has a plurality of holders for tools and/or workpieces, and which can be corrected in a simple manner, the at least one slide has a plurality of separate subslides and the relative position of... | 02/19/2008 |
| 7240411 | Machine tool To provide a machine tool in which positioning accuracy of a ram is ensured, realizing improved machining accuracy. A cylindrical ram 14 supporting a spindle 6 is inserted in a ram guide hole 13a formed in a cross slide 13, the ram... | 07/10/2007 |
| 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 |
| 7232406 | Tool changer of machine tool To provide a tool changer of a machine tool capable of preventing chips from scattering to the outside of the machine from an opening of a cover to adhere to a sliding portion or a gripper portion during tool change. A tool magazine 42 holding a large number ... | 06/19/2007 |
| 7177720 | Machine tool and method for operating a machine tool A machine tool comprises a tool carrier moveable relative to a workpiece to be machined. A controller controls the relative movement of the tool carrier and the workpiece by means of a control program. If an unplanned event occurs during the operational movement of ... | 02/13/2007 |
| 7162906 | Method and apparatus for removing a carrier part from a carrier A method for removing from a carrier a carrier part with a housing arranged thereon, wherein prior to performing the separating operation a notched line is arranged in the carrier on at least one side of the carrier along at least a part of the length of a separatin... | 01/16/2007 |
| 7137939 | Machine tool and boring bar magazine A machine tool is provided with a base, a tool rest and a boring bar magazine. The tool rest is mounted on the base and retains a boring bar. The tool rest is moved in a first direction in parallel with an axis of the main spindle and in a second direction perpendic... | 11/21/2006 |
| 7089838 | Zero centerline toolholder assembly A zero centerline toolholder assembly includes a cutting insert mounted to a toolholder. The center, RC, of the nose radius of the cutting insert is aligned with or lies on a centerline, LT, of the toolholder. The centerline, LT, of the toolholder may be also aligne... | 08/15/2006 |
| 7069632 | Coaxial and concentric cutting machine and a method for use thereof A concentric coaxial cutting machine which cuts cylinders, cylindroids or cones using a chain saw from a single larger object such as a wood tree trunk, a block of ice or a block of plastic. An embodiment of the invention comprises a transverse support member having... | 07/04/2006 |
| 7048478 | Composable machine tool Composable machine tool for chip removal, on major workpieces, within wide diameter and/or great length clearance holes, made up of a shaft (1) upon which a machine base, controlled by a first engine (50) for the rotation movement and by a second engin... | 05/23/2006 |
| 7043805 | NC lathe An NC lathe 1 comprises a bed 5, a headstock 10 provided on the bed 5, a main spindle 11 supported on the headstock 10 so as to be rotatable around the axis thereof, a rotation drive device for rotating the main spindle 1... | 05/16/2006 |
| 7013773 | Tool holder for carrying multiple tool heads simultaneously A tool holder simultaneously carries at least two diametrically arranged tool heads, each tool head carrying cutting inserts for chip removing machining. The tool holder includes an adaptor connected to a coupling. The adaptor has at least two diametrically opposite... | 03/21/2006 |
| 6951511 | Platen with peripheral frame for supporting a web of polishing material in a chemical mechanical planarization system Generally, a method and apparatus for supporting a web of polishing material. In one embodiment, the apparatus includes a platen adapted to support the web, a frame assembly, and one or more flexures coupled between the platen and the frame assembly. The flexure all... | 10/04/2005 |
| 6945147 | Clamping device for machine tools A clamping device for machine tools is disclosed that is capable of ensuring the clamping force for a tailstock while maintaining a small overall size of the device and a reduced number of parts. The tailstock (movable carriage) movably mounted on a fixed bed is cla... | 09/20/2005 |
| 6936990 | Method for controlling electric motor and apparatus for controlling the same An apparatus and method for controlling an electric motor is disclosed. The apparatus includes an instruction inputting section for transmitting an instruction for an electric motor or a control object coupled to said electric motor and a prefilter section for outpu... | 08/30/2005 |
| 6640849 | Wood lathe with a tracing unit A wood lathe includes an axial moving unit with a movable seat, which is sleeved movably on a driving rod and a guide rod that are parallel to each other. A driving gear is disposed rotatably on the movable seat, and engages a gear-engaging member of the ... | 11/04/2003 |
| 6298758 | Lathe with a polygon machining device A lathe includes a polygon machining cutter unit and a turret unit, which are attached to a cutter carrying plate that can be driven to move on a machine body in longitudinal and transverse directions of a spindle. The spindle is connected mechanically to... | 10/09/2001 |
| 6279438 | Metal cutting machining device, with massive block and sliding column and machine integrating this device A device for machining a part by metal cutting comprising a massive block in a bore of which is located a sliding column guided in a front bearing and a rear bearing, at least the front bearing and the section of the column sliding therein being continuou... | 08/28/2001 |
| 6237453 | Two position tool slide for screw machine A rigid tool slide support is disposed to be mounted in a screw machine in either of two different operating positions in each of which a tool slide reciprocates on the upper surface of the support to convey a cutting tool to and from the work that is to ... | 05/29/2001 |
| 6173630 | Working machine for machining a workpiece A working machine for machining a workpiece includes a base having a first track and a second track mounted therein and arranged in parallel with each other, at least one clamping device slidably mounted in the first track for clamping the workpiece, and ... | 01/16/2001 |
| 6082234 | Adjustable toolholder An adjustable toolholder apparatus includes a base plate having a planar supporting surface. A holder body includes a bottom planar supported surface which slideably engages and rests upon the supporting surface of the base plate. A linear position adjust... | 07/04/2000 |
| 6062117 | Machining apparatus for works having non-circular curves An apparatus for machining both inside and outside of a hollow workpiece (16) to impart thereto inner and outer curved surfaces that are contoured to be non-circular is disclosed. It includes workpiece supports (10, 11) that clamp the workpiece oriented s... | 05/16/2000 |
| 5943928 | Lathe carriage unit A lathe carriage unit displaceably mounted on a bed for carrying and moving a tool post in a z-axis or x-axis direction comprises a saddle body having a guide slot extending along the length thereof and first and second bearing housings spaced apart from ... | 08/31/1999 |
| 5868051 | Method and apparatus for machining with a pivoting cutting tool A method and apparatus has been developed for metal cutting machine using a cutting die tool that pivots as it cuts a metal workpiece. By pivoting the cutting tool, the orientation of the metal surface being cut in the workpiece may be varied along the cu... | 02/09/1999 |
| 5546836 | Lathe with an auxiliary transverse table A lathe includes an auxiliary transverse table at an opposite side to a transverse table. The auxiliary transverse table includes an auxiliary tool carrying an abrasive on one end thereof positioned at the opposite side to a machining tool of the transver... | 08/20/1996 |
| 5467675 | Apparatus and method for forming a workpiece surface into a non-rotationally symmetric shape A turning machine includes a controller for generating both aspherical and non-symmetrical shape components defining the predetermined shape, and a controller for controlling a spindle and a positionable cutting blade to thereby form a predetermined non-r... | 11/21/1995 |
| 5460066 | Adjustable cutting tool holder An adjustable cutting tool holder assembly for positioning a cutting tool. The adjustable cutting tool holder has a base portion for mounting to a machine structure, a tool holder portion slidingly engaging the base portion, and an adjustment assembly con... | 10/24/1995 |
| 5349889 | Lathe A slide (4) made up of a table (8) and a base (11) is actuated radially relative to a workpiece (M) to be machined via a stud (17) adjustable in a slot (16). The position of the stud can be regulated by means of a screw and a motor. A roller (24) borne by... | 09/27/1994 |
| 5293793 | Machining apparatus with at least one base unit A lathe comprises at least one base unit which is constructed from two machine beds 4, 7. The machine beds are cast as a one-piece unit from reaction resin concrete and carry the bed guides 5, 8 for a spindle box 6 which is displaceable in the direction o... | 03/15/1994 |
| 5283981 | Cam feed unit for a machine tool A hydraulic cam feed unit is provided for moving a tool slide linearly towards and away from a workpiece. The feed unit comprises a hydraulic advance cylinder having a double rod, one end of which is connected to the tool slide to move the tool slide towa... | 02/08/1994 |
| 5274564 | Method and apparatus for machining a non-circular workpiece An apparatus for machining a non-circular workpiece such as a piston wherein a tool is moved back and forth against the workpiece in accordance with profile data defining a desired final shape of the workpiece while the workpiece is rotated at a predeterm... | 12/28/1993 |
| 5181442 | Device for machining a non-circular sectioned workpiece A machine tool employs a cam, driven in response to an angular position signal of a workpiece, to cyclically displace a cutting tool with respect to the workpiece.... | 01/26/1993 |
| 5152202 | Turning machine with pivoted armature The invention relates to a high speed turning machine for machining a rotating workpiece to have a predetermined profile surface by using a cutting tool mounted on a pivotal tool holder that is reciprocated rapidly toward and from the workpiece surface. A... | 10/06/1992 |
| 5113728 | Method and apparatus for forming intermittent chips when machining a rotating workpiece The formation of intermittent chips or chip breakage are assured while machining a rotating workpiece by causing the undeformed chip thickness to vary periodically and be reduced to zero in each period of its variation. To obtain the periodic reduction of... | 05/19/1992 |
| 5113729 | Clamping device for fixing a spindle sleeve on the platform of an automatic machine tool Clamping device for fixing a spindle sleeve (2) on the carrying platform (1) of an automatic machine tool by interposing a concave carrying slide (3) and using clamping strips (5) which are arranged laterally with respect to the spindle-carrying sleeves a... | 05/19/1992 |
| 5105693 | Machine tool with movable positioning device A machine tool for machining a workpiece (11), the workpiece (11) being fastened to a support (9) which has its bearings in a frame (1) of the machine tool and is rotatable about an axis of rotation (13), while a tool (37) is movable relative to the workp... | 04/21/1992 |
| 5105692 | Positioning device having static fluid bearings A machine tool comprising a third carriage which is guided along a circular cylindrical guide of a second carriage by means of a static fluid bearing and which can thus rotate about an axis of rotation which coincides with a centerline of the circular cyl... | 04/21/1992 |
| 5101699 | Tool slide for a machine tool A light-weight, highly rigid tool slide for a machine tool is provided which may be machined with a high degree of precision, whereby lateral play or "wobble" of the tool is reduced. The tool slide comprises an elongated slide member slidingly carried in ... | 04/07/1992 |
| 5060544 | Method of an apparatus for retracting tool in numberical control machine tool A tool retracting method and apparatus is for retracting a tool in an NC machine tool upon the detection of the occurrence of an abnormal machining condition during operation of the NC machine tool. The tool retraction direction is determined which is cou... | 10/29/1991 |
