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| Number | Title | Issue Date |
| 7232361 | Rock saw The present invention discloses an automated rock saw having a saw motor load sensor to control the speed of the conveyor bringing the rock to the saw blade. As the saw motor works harder to cut a given rock, the controller automatically slows the conveyor belts, re... | 06/19/2007 |
| 7207865 | Apparatus for machining workpieces, in particular workpieces provided with cutting teeth In an apparatus for machining workpieces, in particular workpieces provided with cutting teeth, such as bandsaw blades or circular-saw blades for example, comprising a base (12), a machining device (18) displaceable relative to the base (12) and... | 04/24/2007 |
| 7178436 | Method of cutting carbon and alloy steel The present invention discloses a method and apparatus for controlling the load on the blade of a steel-cutting saw A programmable logic controller senses the spindle motor load current and compares it with the desired optimum operating current. Variations in hardne... | 02/20/2007 |
| 7171879 | Discrete proximity detection system A machine is described having at least one dangerous portion. The machine also includes a safety system to detect dangerous proximity between a person and the dangerous portion and perform a predetermined action to limit or prevent injury to the person from the dang... | 02/06/2007 |
| 7056188 | Rock saw The present invention discloses an automated rock saw having a saw motor load sensor to control the speed of the conveyors bringing the rock to the saw blade. As the saw motor works harder to cut a given rock, the controller automatically slows the conveyor belts, r... | 06/06/2006 |
| 7056189 | Grinding method of a workpiece and grinding apparatus An adaptive work table-reciprocation control system and method that can reduce a grinding time. The system uses a vibration sensor head installed on a chuck surface in the vicinity of the workpiece to detect a vibration signal emitted from the contact zone between t... | 06/06/2006 |
| 7018272 | Pressure feed grinding of AMLCD substrate edges The present invention is directed to an apparatus for grinding or polishing at least one edge of a glass substrate. The apparatus includes an air bearing support member configured to pivot about an axis of rotation with zero frictional resistance opposing said pivot... | 03/28/2006 |
| 6638138 | Arrangement of grinding modules with grinding tools in track grinders An arrangement of grinding modules in a track grinder wherein a radial mismatch in narrow track bend radii can be considered in an exact manner without occurrence of constraining forces, enabling reprofiling to be reproduced in a simple manner. The arrang... | 10/28/2003 |
| 6490504 | Feeding robot and control method therefor A feeding robot which is capable of drawing a glass panel for a liquid crystal display from a cassette without bringing it into collision with the cassette, and then feeding the drawn glass panel with a reduced error, and a method for controlling the same... | 12/03/2002 |
| 6390888 | Grinder pressing device A grinder pressing device, wherein either the bottom part of a cylinder main body (10) of an air cylinder (1) in a vertical posture or a piston rod (11) is fixed to a fixed plate (2) and the other one is fixed to a movable plate (3) disposed under the fix... | 05/21/2002 |
| 6264534 | Method and tooling for automated wet or dry sanding of a vehicle surface An automotive vehicle body can be sanded with a robotic sanding (polishing) disk that is carried on a robotic head, such that the sanding disk has a relatively constant unit pressure on the vehicle surface as the head moves the sanding disk along the vehi... | 07/24/2001 |
| 5944580 | Sensing device and method of leveling a semiconductor wafer An improved sensing device and method for leveling a semiconductor wafer in a chemical mechanical polishing apparatus, which easily detects the change of pressure from a semiconductor wafer contacting with the polishing surface. The present invention incl... | 08/31/1999 |
| 5618221 | Method of dressing grindstone for NC grinder A dressing method comprises the steps of rotating a rotary dresser at a high speed for dressing a surface of the grindstone, previous to contact of the rotary dresser with the surface of the grindstone, and detecting a rotational vibration caused by a bea... | 04/08/1997 |
| 5558557 | Three axis control for machine tool A three axis control for a machine tool which maintains a plane surface being ground or machined by a tool at a desired orientation. A base supports an intermediate plate on flexures, and the position of the intermediate plate in a plane parallel to the b... | 09/24/1996 |
| 5371975 | Process and device for machine-working or rolls and similar workpieces A process for machining mils and similar work pieces, especially for grinding the roll surface to a desired shape which process is characterized by continuously meshing the distance between the part of the work piece (1) which is subjected to working and ... | 12/13/1994 |
| 5022186 | Tire uniformity correction An apparatus and method for reducing radial force variations of pneumatic tires by removing rubber in selected areas of the tire wherein a tire is rotated at a suitable high speed for nongrinding functions such as warmup and testing and the tire is rotate... | 06/11/1991 |
| 4984393 | Method for tire uniformity correction A method and apparatus for tire uniformity correction. During a sensing phase, the tire to be corrected is rotated at a speed higher than the industry standard of 60 revolutions per minute while sensing the force variations to be removed. During a rubber ... | 01/15/1991 |
| 4852434 | Machine tool with a sliding screw drive A machine tool having a work spindle with an electrically actuated clamping unit including a three-phase motor with a stationary stator. The motor is supplied with electricity from a control unit operating with frequency conversion, and the control unit i... | 08/01/1989 |
| 4848845 | Steerable self-regulating concrete cutting saw A self-propelled concrete cutting saw in which the saw and self-propelled platform associated with the saw are both driven by hydraulic motors, with separate motors for each of the two propelling wheels so that the device may be steered by varying the spe... | 07/18/1989 |
| 4837980 | Method and apparatus for tire uniformity correction A method and apparatus for tire uniformity correction. During a sensing phase, the tire to be corrected is rotated at a speed higher than the industry standard of 60 revolutions per minute while sensing the force variations to be removed. During a rubber ... | 06/13/1989 |
| 4821460 | Arrangement for controlling the speed of advance of a tool toward a workpiece The arrangement enables controlling the speed of advance of the tool part of a machine tool during its approach phase toward a workpiece and reducing such speed as soon as the tool contacts the workpiece. It includes an acoustic sensor adapted to detect the si... | 04/18/1989 |
| 4802311 | Method of grinding rotary workpieces The grinding of successive workpieces in a surface grinding machine with automatic transport of workpieces to and from the grinding station is interrupted at preselected intervals to replace the workpiece at the grinding station with a pattern which is co... | 02/07/1989 |
| 4791759 | Grinding wheel position detecting means for surface grinding machine A grinding wheel position detecting means for a surface grinding machine, in which a super-grain grinding wheel is composed of a base metal fastened to a longitudinal end portion of a rotating shaft and a super-grain layer provided on a longitudinal end f... | 12/20/1988 |
| 4772161 | Profile working machine A profile working machine includes a support portion, a working portion, and a drive and control system. The machine also includes displacement sensors for detecting the present relative displacements between the support portion and working portion, a loa... | 09/20/1988 |
| 4756298 | Apparatus for machining relatively hard building material The drive motor (1) drives a machining tool (2) which can be fed forwardly by means of a feed motor (3). Both motors (1, 3) are supplied with pressure fluid by the same hydraulic pump (4). A quantitative divider valve (5) divides the oil flow coming from ... | 07/12/1988 |
| 4753048 | Method of for grinding There is disclosed a method of and apparatus for improving surface finishing and accuracy in a grinding operation employing a manipulator such as a robot which is coupled to a rotary grinding tool. The method comprises reducing the coupling effects betwee... | 06/28/1988 |
| 4748966 | Self-regulating concrete cutting saw A self-propelled concrete cutting saw in which the saw and the self-propelled platform associated with the saw are both driven by hydraulic motors, with the speed of longitudinal movement of the saw through the concrete being controlled by the density of ... | 06/07/1988 |
| 4744348 | Dressing apparatus for grinding wheels A grinding wheel dressing apparatus including a housing, a dresser shaft rotatably mounted on the housing and having one end adapted for connection to a drive shaft and an opposite end adapted to receive a dresser wheel, and an acoustic sensor retained by... | 05/17/1988 |
| 4669228 | Tire uniformity abrading method An apparatus for reducing radial force variations of pneumatic tires by removing rubber in selected areas of the shoulders wherein the current generated by each grinder motor is detected, converted into DC voltages of opposite polarities which are summed ... | 06/02/1987 |
| 4666352 | Profile working machine A profile working machine is equipped with a support for holding a work in place, a working tool for machining the work, and drive and control systems for controlling the relative displacements between the support and the working tool. The profile working... | 05/19/1987 |
| 4648210 | Apparatus for controlling position of grinding tool Apparatus is disclosed for grinding the edges of a glass sheet which is positioned on a motor driven rotary table. The apparatus includes a grinding disc mounted to rotate in a toolholder which may be moved in relation to the axis of rotation of the rotar... | 03/10/1987 |
| 4637169 | Apparatus for controlling the advance of a machine tool toward a workpiece The advance of a tool toward a workpiece is controlled with two acoustic transducers, one acting as a transmitter and the other as a receiver. The acoustic energy transmitted from the one to the other as the tool and the workpiece approach one another (th... | 01/20/1987 |
| 4633620 | System for processing of steel billets or the like to remove surface defects Methods and apparatus are disclosed for processing of steel billets or the like to remove surface defects. A material-removing device such as a grinding wheel is automatically controlled to initiate removal of material at points where defects have been de... | 01/06/1987 |
| 4630214 | Jig grinder with automatic reciprocation and outfeed control A control system for an automated jig grinder enables an operator to designate an incremental outfeed distance to be traversed for each outfeed operation and a reciprocation stroke count to be completed between successive outfeeds. The control system coun... | 12/16/1986 |
| 4604835 | Apparatus for automatic maintenance of surface speed and work-bearing force for rotary tool apparatus The wear of a rotary finishing wheel operating against a continuously advancing work piece causes reduction in force of the wheel against the work piece. Wheel drive motor current is measured and the wheel is advanced toward the work piece to maintain sub... | 08/12/1986 |
| 4602459 | System for active error compensation during machining A control system for precision machine tools and similar devices provides a precise position during active operations on a table supported workpiece or part. The present system provides a support table on which a machine part or specimen is mounted that i... | 07/29/1986 |
| 4575970 | Metal strip edge grinding apparatus An apparatus for grinding edges of running metal strips by a rotating grinding wheel, including a grinding wheel supporting table carrying thereon the grinding wheel and a motor for driving the grinding wheel, and driving means for forward and backward dr... | 03/18/1986 |
| 4570389 | Method of adaptive grinding A grinding adaptive control system and method is described which automatically determines the feed rate to maintain constant wheel sharpness without wheel breakdown. Wheel sharpness at a given feed rate is sensed by the steady state horsepower or normal f... | 02/18/1986 |
| 4561216 | Workpiece engaging apparatus in grinding machines An apparatus for bringing a rotary grinding tool into mesh with a workpiece while minimizing a grinding resistance by the workpiece when the workpiece is to be ground by the rotary grinding tool. An electric power detector is associated with the rotary to... | 12/31/1985 |
| 4558537 | Centerless honing machines having automatic size control Centerless honing machines are described for honing external cylindrical surfaces on a series of workpieces. Each machine comprises a pair of spaced adjacent rotary rollers for supporting and rotating workpieces while also causing them to travel axially a... | 12/17/1985 |
