Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7349380 | System and method for providing an addressing and proxy scheme for facilitating mobility of wireless nodes between wired access points on a core network of a communications network A communications network which is capable of effectively and efficiently handling mobility of wireless user terminals between access point nodes of a packet-switched network with minimal overhead and packet loss, and a method for using the same. The communications n... | 03/25/2008 |
| 7273335 | Machine tool A machine tool includes a table supported by a bed for forward and rearward movement along a path of movement, left and right transversely aligned upright columns on opposite sides of the path of movement, a cross rail supported in the columns for movement upwardly ... | 09/25/2007 |
| 7261503 | Multi-axis machine tool In a multi-axis machine tool comprising a slide way aligned on a longitudinal axis, a traveling column coupled via one end with the slide way, an arm mounted slidably to the column and traversable at least in a first direction normal to the longitudinal axis of the ... | 08/28/2007 |
| 7237991 | Machine tool The present invention provides a machine tool capable of reducing residual vibration occurring at the location time, thereby achieving responsiveness to a recent demand for higher acceleration/deceleration speed. The machine tool is configured such that a column ... | 07/03/2007 |
| 7137760 | Methods and apparatus for manufacturing operations using opposing-force support systems Methods and apparatus for manufacturing operations using opposing-force support systems are disclosed. In one embodiment, an apparatus includes a track assembly adapted to be attached to a workpiece, and a carriage moveably coupled to the track assembly. The carriag... | 11/21/2006 |
| 7128507 | Machine tool The present invention provides a machine tool capable of achieving a higher feed rate of a spindle and weight reduction while ensuring necessary stiffness of a column. The present invention includes: a bed; a saddle disposed on the bed to be movable in a Y-axis dire... | 10/31/2006 |
| 7125211 | Apparatus and method for damping vibration in a machine tool A machine tool for performing a machine tool function including components adapted to cooperate with each other to execute the machine tool function. The machine tool has a number of constituent parts and a number of sheets of damping material. Each component includ... | 10/24/2006 |
| 7086814 | C-type column structure A C-type column structure. The C-type column structure includes a hollow column, a column extending portion, and a support portion. The hollow column is formed with a closed U-shaped cross section, a curved portion, a trapezoid portion, a first end surface, and a se... | 08/08/2006 |
| 7024789 | Position measuring device with a temperature correction device A position measuring device that includes a first element having a material measure and a temperature measuring unit with a sensor, the temperature measuring unit is unable to be displaced relative to the material measure. A second element having a scanning head, an... | 04/11/2006 |
| 6932549 | Mandrel-holding slide or sleeve pod for numerical-control machine tools In a numerical-control machine tool use is made of a mandrel-holding structure that makes it possible for the machine tool to be used to smoothing/facing and polishing purposes under utilization of traditional pan-like tools, in which the force acting on the working... | 08/23/2005 |
| 6901682 | Rotation angle detecting apparatus and its rotary disc A rotary disc made of synthetic resin has a fixed portion fixed to a rotary shaft, a cylindrical portion extending in the thrust direction from the outer peripheral edge of the fixed portion, and a disc main body portion extending in the radial direction from the lo... | 06/07/2005 |
| 6866451 | Device for detecting a thermal linear dilation on part of a machine A device for detecting thermally caused linear expansions of a machine element, wherein the device includes a temperature sensor placed along an expansion direction. The temperature sensor includes a first metallic conductor having an electrical resistance that is p... | 03/15/2005 |
| 6843624 | Machine tool A machine tool capable of performing an accurate machining by preventing a second saddle 6 from displacing aslant to suppress the vibrations of a spindle head 8, wherein a column 2 is fixedly installed on bed 1, a first saddle 4 is... | 01/18/2005 |
| 6821064 | Apparatus for compensating position errors of spindle head and machine tool provided with same An apparatus for compensating position error of a spindle head, comprises: Y-axis control parts 32a, 32b for controlling first and second servomotors 24a, 24b on the basis of a spindle head moving command fed f... | 11/23/2004 |
| 6579047 | Guide and support device for small machine tools, in particular for rotating-mass balancing machines It is provided a support and guide device for small machine tools, in particular for rotating-mass balancing machines, comprising: a base element (2), at least one moving element (3) in engagement with the base element (2), support elements (4) for the mo... | 06/17/2003 |
| 6547499 | Prestressing device for a mechanical finishing device A prestressing device for a mechanical component of a mechanical finishing device has at least one rigid prestressing unit mounted in the mechanical component. This can provide a prestressing tension to the mechanical component. The bending and the deform... | 04/15/2003 |
| 6539274 | Method for compensating for temperature-related dimensional deviations in machine geometry A method for reducing computational expenditure required to compensate for temperature-related dimensional deviations in a machine tool is described. Temperature-related dimensional deviations are compensated for before the user input information existing... | 03/25/2003 |
| 6371704 | Anti-whip device for drive screws of machine tools In a machine tool having a base member, a member moveable relative to the base member, an elongated drive screw supported on the base member and an operative connection between the moveable member and the drive screw whereby upon driving the drive screw t... | 04/16/2002 |
| 6325576 | High throughput hole forming system with multiple spindles per station A high throughput drilling system for printed circuit board hole formation. Two spindles are disposed at each spindle station, doubling the number of holes produced in a given time period. Each spindle in connected to an overhead linear drive by a mini sl... | 12/04/2001 |
| 6325578 | Method of error compensation for angular errors in machining (droop compensation) Plural spaced actuators mounted along a first axis are used to control machine tool motion along a first axis. The plural actuators are used in synchronism to create linear motion of the machine tool and the tool tip mounted on the machine tool along the ... | 12/04/2001 |
| 5829932 | Machine alignment compensation actuator system A machine alignment compensation actuator system is disclosed. The system is designed to selectively orient the tool head of a machine tool to maintain the tool along a desirable axis of alignment. The system includes a framework and a machine slide assem... | 11/03/1998 |
| 5482416 | Metal working machine A vertical milling or boring machine has a tool head supporting column which rides on base mounted rails. A ball, screw extends along the base under the column. Each column has a motor driving a nut carried by the ball screw. The nut is caged by the colum... | 01/09/1996 |
| 5425607 | Anti-whip device for machine drive screws In a machine tool having a base member, a moveable member and a drive screw assembly for displacing the moveable member relative to the base member, an anti-whip device for the drive screw assembly generally consisting of a support member mounted on the b... | 06/20/1995 |
| 5423237 | Machine-tool with machining head mounted for moving on a horizontal rail A machine tool having torsional compensation for the machine tool support. Generally, a machine tool head is movably mounted on a cross member in such a way that it induces a torsional couple in the cross member. A mechanism is provided for inducing a tor... | 06/13/1995 |
| 5349731 | Temperature compensated and shock resistant machine tool A machine tool comprises a frame; a work holder operably associated with the frame; at least one carriage disposed on the frame and movable along an axis; at least one tool disposed on the carriage for operating on a work piece disposed in the work holder... | 09/27/1994 |
| 5297907 | Portable machine tool A machine tool comprises an elongated beam adapted to be supported in a horizontal orientation at two locations spaced apart therealong and adapted to support a machining head. Tensioning bars extend parallel to the beam and engage the beam at opposite en... | 03/29/1994 |
| 5259710 | Octahedral machine tool frame A machine tool frame is disclosed which is comprised of twelve struts connected together at their ends in six nodes to define the eight triangular panels of an octahedron. Forces generated by the operation of the machine tool are received by the frame at ... | 11/09/1993 |
| 5214592 | Machine tool position correcting method and apparatus A machine tool position correcting method and apparatus applied to a machine tool including a spindle head provided on a column and a ram which is movable horizontally on the spindle head and has a main shaft to which a tool is mountable. In the arrangeme... | 05/25/1993 |
| 4675977 | Machine tool The machine tool comprises a vertical post (14) on which a head changer (19) is mounted for changing the tool head (17) provided at a head carrier (16). The head changer (19) is rotatable about a vertical axis. It carries at least one head gripper (22) wh... | 06/30/1987 |
| 4520700 | Tailstock for rotatably mounting a workpiece in precision machinery A tailstock for rotatably supporting a workpiece on a machine bed. The tailstock includes a vertical column fixed at the machine bed which has first and second regions. The second region of the column is coaxial with the first region and pivotally mounted... | 06/04/1985 |
| 4449389 | Device for bending a tool holder of a folding press or the like This device for bending the tool holder of a folding press comprises structure for controlling the deformation of the wedge secured at either end, in the form of a hollow screw engaged in a socket rigid with the tool holder so that it can accomplish movem... | 05/22/1984 |
| 4100837 | Temperature compensated measuring device A machine tool is provided with a measuring device having two outer steel rods each fixed at one end to the machine casing and each connected at its free end with an aluminium rod of about the same length, the aluminium rods being joined together at their... | 07/18/1978 |
