Did You Know...
...that the video game, Pong, was invented by a guy who graduated at the bottom of his engineering class? Nolan Bushnell spent more time running the games at a local amusement park than he did on his studies at the University of Utah. His dreams of working for Disney's amusement empire were dashed when the company wouldn't hire him. Taking a boring job, Nolan daydreamed about electronic versions of popular games. He invented Pong, the first video game, and went on to found Atari Co.
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| Number | Title | Issue Date |
| 6834539 | Rotary machine element and method for detecting positional values of at least one functional part of such a rotary machine element A rotary machine element has at least one functional part performing movements into stop positions, which stop positions are nominal stop positions or mechanical terminal stop positions and are functionally correlated. At least one position sensor is provided for de... | 12/28/2004 |
| 6527279 | Integrated powered lathe chuck An integrated power chuck assembly for a lathe has a hollow lathe spindle of a diameter sufficient to accommodate at least the actuating cylinder and a multiple medium feed device and preferably at least part of the stroke-control device which can include... | 03/04/2003 |
| 6502835 | Collet holder with rotation mechanism and method A work piece holder with clamping and rotation mechanisms in a support. A holder or brake exists next to a collet and sleeve assembly to restrain the assembly from rotating. Hydraulic pumps and connections operate on the mechanisms for the clamping and ro... | 01/07/2003 |
| 6478310 | Combination pneumatic chuck with position detecting mechanism A stroke first air cylinder mechanism having a larger-diameter first piston and a larger-diameter first rod is incorporated in a casing, a chuck second air cylinder mechanism having a smaller-diameter second piston and a smaller-diameter second piston and... | 11/12/2002 |
| 6463835 | Method and apparatus for controlling motor-driven chucking device A method and apparatus for controlling a motor-driven chucking device which are capable of delicately controlling the workpiece gripping force, the travel speed of gripping jaws, and so forth. The method controls a motor-driven chucking device in which gr... | 10/15/2002 |
| 6341553 | Chuck actuator with pressure sensor A chuck assembly has an actuator cylinder centered on and rotatable about an axis but substantially nondisplaceable relative to the axis, a chuck housing spaced axially from the cylinder, and a tubular connecting shaft extending along the axis and connect... | 01/29/2002 |
| 6270084 | Pneumatic chuck assembly A rotary chuck having a chuck body supporting a plurality of clamping jaws for movement between open and closed positions and defining a cylindrical piston chamber containing an axially movable double acting piston coupled to a jaw actuator. A plurality o... | 08/07/2001 |
| 6241258 | Method of controlling clamping and unclamping of a hydraulic chuck A method is disclosed of controlling a hydraulic chuck of a rotary machine tool, the chuck clamping a workpiece to be machined and being actuated by a double-acting clamping/unclamping actuator. A clamping pressure controlled in accordance with a clamping... | 06/05/2001 |
| 6170835 | Workpiece clamping apparatus A plurality of clamping motion elements with clamping jaws are moved out of an initial position towards a workpiece under a low operating pressure and caused to bear thereagainst. When all the clamping jaws bear uniformly against the workpiece, a full cla... | 01/09/2001 |
| 5876041 | Chuck drive system, especially for a rotating clamping device of a machine tool A chuck drive system, especially for a rotating clamping device of a machine tool, includes a rotating chuck cylinder, a stationary frame positioned adjacent the chuck cylinder, and a piston which subdivides the cylinder into two pressure chambers and is ... | 03/02/1999 |
| 5501137 | Hydraulic machine-tool actuator with position detectors An actuator has a cylinder centered on an axis and a piston axially displaceable in the cylinder, defining therein axially opposite front and rear compartments, and having an axially rearwardly projecting stem. A distributor is axially fixed but rotatable... | 03/26/1996 |
| 5222421 | Centering device A centering device in a machine tool having a chuck for clamping a work includes a clamp device for clamping and centering the work at a different position with respect to the chuck. The clamp device has an actuator driven by a pressure medium and a holde... | 06/29/1993 |
| 5135242 | Adjustable chuck for gripping workpieces of different sizes at controlled pressures In an adjustable chuck for gripping workpieces of different sizes, three jaws are mounted for relative movement. A hydraulically driven mechanism is operable selectively for closing the jaws to grip a workpiece and for opening the jaws to free the workpie... | 08/04/1992 |
| 5027926 | Slip assembly An hydraulically operated slip assembly useful to grip pipe being run into or pulled from a well. This assembly has upper and lower plates, each having a passage for pipe. Wedges, carrying unique slip systems are positioned around the passages between the... | 07/02/1991 |
| 4995303 | Sensor-equipped actuator for power chuck A power actuator has a hollow cylinder housing generally centered on an axis, a piston axially displaceable but non-rotatable in the housing and defining therein a pair of axially opposite pressurizable compartments, and a piston stem centered on the axis... | 02/26/1991 |
| 4932674 | Lathe chuck with chuck-clamping monitor An operation control device is provided for a chuck by which the rotary drive for the chuck is disengaged when the clamping motion leading to clamping of the workpiece in the chuck has not been provided or is not sufficient. The clamp jaws of the chuck ar... | 06/12/1990 |
| 4781390 | Apparatus for the adjustment of the tension in a rotating gripping device of a machine tool An apparatus for the adjustment of the tension in rotating gripping devices, which are operable with variable power outputs and follow (hysteresis) distinct tension-characteristics for build-up and withdrawal. In order to make possible a stabilization of ... | 11/01/1988 |
| 4763401 | Automatic tool-changing device for industrial robots An automatic tool-changing device for industrial robots includes a gripper member located at the end of the robot arm and a coupling flange to which a tool is fixed. The gripper member has radially-movable engagement teeth adapted for insertion in project... | 08/16/1988 |
| 4746252 | Spindle of a machine tool A spindle of a machine tool is mounted for rotation about a longitudinal axis. The spindle comprises clamping means for clamping and releasing a tool. An energy accumulator is charged when the tool is not clamped and is at least partly discharged to tight... | 05/24/1988 |
| 4734251 | Multi-gripper handling apparatus with individual force limiter A handling apparatus which is intended primarily for operations involving pulling and pushing nuclear fuel rods which are carried out when dismantling assemblies, comprising a handling head in which there are provided a plurality of cylinders (6) in which... | 03/29/1988 |
| 4700955 | Chucks A fluid-operated ram, for example comprising a cylinder 10 and piston 12, is provided for actuating a device such as a chuck having jaws 15. When the jaws are moved by the ram to grip a workpiece this constitutes a limiting position which impedes the flow... | 10/20/1987 |
| 4693431 | Winding shaft for sheet rewinder A winding shaft for a sheet rewinder comprises a hollow shaft provided in its peripheral wall with through-holes, a plurality of drum rings rotatably fitted around the hollow shaft, plungers inserted one in each through-hole, support rings provided at the... | 09/15/1987 |
| 4669362 | Rotary fluid pressure cylinder device for operating chucks for machine tools A power cylinder for operating a chuck for a machine tool has a rotary cylinder casing, a pair of check valves for confining a pressure fluid in an operating chamber, accumulators for absorbing impacts of the pressure fluid, and detecting means for detect... | 06/02/1987 |
| 4630979 | Cartridge tool locking and unlocking device for toolholders Locking and unlocking device for cartridge-type tools used in a toolholder mounted on a machine tool ram comprises transmission apparatus (20) connected to control apparatus (24) and arranged to slide axially within a rotating block (23), said transmissio... | 12/23/1986 |
| 4621568 | Rotary hydraulic cylinder A rotary hydraulic cylinder for actuating a rotary work holder, on a machine tool. A non-rotary fluid distributor is supported on the cylinder by a bearing sleeve. The bearing surface of the sleeve has an anti-friction coating. The sleeve is rotatable wit... | 11/11/1986 |
| 4580796 | Hydraulic clamping nut The invention relates to a hydraulic clamping means, in particular, a clamping nut, for mutual axial clamping of two workpiece sections or machine parts, in particular, a collet and a chuck, comprising an annular housing engaging one workpiece section or ... | 04/08/1986 |
| 4533287 | Cutter head with locking pressure indicator A tool cutter head of the type having fluid pressure locking means to hold the cutter head on a spindle includes locking pressure indicator means providing visual verification to a machine operator that proper locking pressure is applied.... | 08/06/1985 |
| 4513979 | Machine tool with chucking controls An improved machine tool has a chuck assembly which is actuated by a piston and cylinder type motor assembly. When a workpiece is to be gripped by the chuck assembly, high pressure fluid is directed to one chamber of the piston and cylinder motor and is e... | 04/30/1985 |
| 4505488 | Automatic indexing chuck An indexing chuck for performing multiple machining operations on a workpiece is disclosed in which the clamping and machining forces applied to the workpiece do not distort the indexing chuck or cause bell mouthing. The indexing chuck is fabricated by se... | 03/19/1985 |
| 4493242 | Actuator for power chuck A chuck actuator has a cylinder extending along a main axis and a piston axially displaceable in the cylinder, forming therein two compartments, and having an axially backwardly extending stem also centered on the axis and formed with two respective intak... | 01/15/1985 |
| 4493041 | Method and apparatus for determining the working range of a double-acting clamping cylinder for actuating chucking devices on machine tools The present invention relates to a method and apparatus for determining a working range of a double-acting clamping cylinder for actuation of operating devices, such as supporting, centering or chucking devices, respectively on machine tools, particularly... | 01/08/1985 |
| 4443021 | Apparatus for adjusting two end positions limiting a clamping stroke In a clamping unit, particularly in a chuck with exchangeable jaws, one terminal clamping position is reached during opening when the clamping jaws approach the limit of stability. The other end position is reached during closing when the jaws approach th... | 04/17/1984 |
| 4434990 | Fluid-actuated hollow power chuck A fluid-actuated type hollow power chuck has a hollow cylindrical chuck body with a forward part of larger outer diameter and a rearward part of small outer diameter. A cylinder body of a hollow cylindrical shape is secured to and around to the outer surf... | 03/06/1984 |
| 4425060 | Machine tool chuck A chuck for drilling tools is formed with a hollow shank which can be accommodated in a machine spindle, and is provided with a sleeve, which is adapted for accommodating a quick-change insert in the form of a tool or serves to accommodate a tool and whic... | 01/10/1984 |
| 4414871 | Chuck force modulator system for rotary type machine tool The disclosure relates to an improved chuck force control and compensating means for rotary machine tools, such as lathe. The control is used with power-operated chucks and provides reliable and effective compensation for the effect of centrifugal force, ... | 11/15/1983 |
| 4412766 | Apparatus for chucking and releasing of a conical shank of a tool or an additional aggregate on tool machines, in particular drilling and milling machines An apparatus for chucking and releasing a conical shank of a tool or an additional aggregate on tool machines, particularly drilling and milling machines. The apparatus has a hollow spindle which is supported in a spindle housing and has at its lower end ... | 11/01/1983 |
| 4387907 | Device for controlling a working machine An improved device for controlling a working machine of the type having a chuck body including a rotary chuck cylinder closed by a cylinder cover to define a substantially closed pressure space and a chuck piston slidably disposed in the pressure space fo... | 06/14/1983 |
| 4332186 | Hydraulic actuator for lathe chuck An actuator for a power chuck has a hollow actuator housing having a rearwardly extending housing tube that is centered on an axis and that has a closed rear end. This tube is formed with a pair of axially spaced and radially inwardly open grooves both ha... | 06/01/1982 |
| 4304513 | Milling machine including improved tool knock-out means A milling machine includes a C-shaped frame, tool support member movable in a vertical direction, a saddle member movable in a transverse direction, a work table movable in a longitudinal direction, a tool drive unit, a tool knock-out assembly and two opp... | 12/08/1981 |
| 4221160 | Fluid operating mechanism for a rotary chuck Fluid operating mechanism providing stationary and rotary companion parts of a fluid coupling having in the rotary part a cylinder with a piston defining therein opposite chuck closing and opening cylinder ends, and ports in both coupling parts which, tog... | 09/09/1980 |
