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| Number | Title | Issue Date |
| 7059457 | Expansion motor The present invention is a unique motor comprising a containment chamber having thick walls surrounding a thin wall, is created when a plug is fusible joined. An inlet port and preferably a purging port are located in the thick walls. A motion is created when said e... | 06/13/2006 |
| 7036827 | Three directional opening/closing chuck Cylinder mechanisms are provided for driving three jaw members each of which includes a cylinder hole having a long circular cross section, a piston which slides in the cylinder hole and has a long circular cross section, and a piston rod extending from the piston. ... | 05/02/2006 |
| 6348029 | Machine tool The invention relates to a machine tool comprising at least one machining unit having at least one work spindle which can be driven. The machine tool also comprises at least one tool magazine arranged in the working area, and has actuating devices for aut... | 02/19/2002 |
| 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 |
| 6015154 | Large displacement hydrostatic workpiece holder A hydrostatic tool holder having a displaceable metal sleeve formed with a plurality of circumferentially spaced and longitudinally extending slots and a flexible, polymeric ring defining at least in part a fluid chamber to separate the fluid in the chamb... | 01/18/2000 |
| 5970829 | Apparatus and method for machining a hollow generally cylindrical workpiece A fixture for holding a brake drum or other similarly shaped workpiece for machining. The fixture includes a body having a body cavity and a clamping assembly disposed therein. The clamping assembly includes a positioning plate having a plurality of posit... | 10/26/1999 |
| 5951023 | Air chuck An air chuck includes a central core having a central portion, an enlarged end flange at a first end, a sloped transition section between the central portion and the enlarged end flange and having an outer inclined surface at a first inclination angle of ... | 09/14/1999 |
| 5248155 | Container holder A container holder which can be used with a variety of containers when positioning them in a container processing step is disclosed. Pairs of container holding members are disposed within a holder body which receives a container. One pair of holding membe... | 09/28/1993 |
| 4811963 | Automatic indexing chuck for angular step-by-step movement of jaws An automatic indexing chuck comprises a dividing pivot separately and in succession, operated by a dividing shaft and a locking sleeve. The dividing shaft is slideably and sealingly accommodated in a cavity of the locking sleeve which has retention planes... | 03/14/1989 |
| 4779877 | Wafer support assembly An assembly is provided for supporting semiconductor wafers individually within a support while permitting processing of both faces of a wafer as well as facilitating rapid insertion and removal of wafers into the support. Each assembly includes a wire cl... | 10/25/1988 |
| 4643262 | Pressurized medium actuated gripping device A pressurized medium actuated gripping device which is included in a rock or earth drilling machine for rotary drilling, and is adapted for gripping a drill rod for transmitting rotation and/or axial movement to a string of drill rods, said gripping devic... | 02/17/1987 |
| 4593769 | Rotary rock drilling chuck A chuck for a drilling machine is fitted to a retractable spindle 21. Plungers 25 carried by a yoke 26 move when the yoke 26 abuts the front end 20 of the machine. This charges an accumulator carried inside the chuck body. Opening a valve 39 causes the ch... | 06/10/1986 |
| 4593919 | Rotary drill chuck with belleville spring biased jaws which are centrifugally balanced A rotary rock drilling chuck has three jaws for clamping a drill stem. Each jaw is carried by the step of a piston acting in a cylinder against belleville springs between it and an end cap. A projection from the piston passes through the belleville spring... | 06/10/1986 |
| 4582331 | Fast-release power-chuck assembly for a lathe A power chuck assembly has a lathe spindle extending along and rotatable about an axis and having axially opposite front and rear ends. An axially displaceable actuator rod extends at the axis through the spindle and has front and rear rod ends at the res... | 04/15/1986 |
| 4557630 | Vibratory clamping device for use with an excavator in supporting and placing sheeting when excavating in sand, running sand and silt A first portion of the device is suspended by a head from the mounting for an excavator bucket and comprises a first jaw and a guideway. A second portion of the device comprises a second jaw and a slide slidable within the guideway under the control of a ... | 12/10/1985 |
| 4508357 | Power-operated chuck for turning machines A power-operated chuck, for turning machines, having at least one jaw which is radially movably guided in a chuck body and which is actuated by a pressure medium piston which is movably guided in the chuck body and the working chamber of which is connecte... | 04/02/1985 |
| 4306731 | Wafer support assembly An assembly is provided for protectively supporting semiconductor wafers individually within a support while permitting processing of both faces of the wafer, as well as facilitating rapid insertion and removal of wafers into the support, and movement of ... | 12/22/1981 |
| 4229014 | Air-expanded mandrel having means to equalize expansion to obtain concentric chucking A fluid actuated expanding mandrel or internal chuck is provided with means including very stiff springs to cause the expanding members to move outwardly a substantially equal amount, whereby a roll or workpiece is concentrically mounted, despite loosenes... | 10/21/1980 |
| 4215262 | Automatic percussion welding apparatus with stud feed A percussion welder includes a single acting main cylinder having a ram extending through both ends of the cylinder mounting a spring loaded chuck on one end of the ram and an adjustable return spring on its other end. An automated version includes a hollow ra... | 07/29/1980 |
| 4114909 | Core locking device An expandable device for locking an annular core to a shaft for rotation therewith in which an annular body mounts on the shaft and carries a plurality of radially movable bars overlying a single-wall annular bladder lying against the surface of the body.... | 09/19/1978 |
| 4099732 | Expandable shaft An expandable shaft for the mounting of cores, working tools, and the like comprising a perforated metal shell with an internal elastomeric liner positioned therein and in intimate contact with the interior thereof, portions of the liner extending into th... | 07/11/1978 |
| 4019378 | Hydraulic chucking head This hydraulic chucking head, especially for testing machines wherein the test sample must be held without play in the direction of load application, includes at least two test sample holding pistons movable along a common axis toward each other and towar... | 04/26/1977 |
