Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7611315 | Motor element, in particular medical handpiece with a collet chuck In the case of a motor element, in particular of dental technical handpiece or a motor spindle, which at least in its front region has an elongated shank, rotatably mounted in which there is a hollow drive shaft, arranged in whose front end region there is a collet ... | 11/03/2009 |
| 7547169 | Drilling module with automatic tool changer A machining unit comprising a quill carrying a spindle, a tool clamping mechanism on a forward end of the spindle, a drive shaft for rotatably driving the spindle through the quill, a tool feed actuator for extending and retracting the quill to and from a home posit... | 06/16/2009 |
| 7484916 | Machining center with improved draw bar alignment A machining center having a draw bar extending through a spindle with coolant positioned inside the draw bar for cooling a tool comprises a piston rod movable between an operating position and an extended position, a drive post rotatable about an axis of rotation, o... | 02/03/2009 |
| 7473060 | Clamping device The subject matter of the present invention relates to a clamping device for clamping a tool or a tool holder (2) in a machine spindle (1), comprising a drawbar (6) that can axially move back and forth between a clamping position and a release p... | 01/06/2009 |
| 7448833 | Automatic tool changing assembly for a machine tool An automatic tool changing assembly for a machine tool has a bottom frame, a base, a cylinder block, an air motor and an air transporting device. The bottom frame is securely mounted on the machine tool and has a bottom panel, two sliding bars and a spring. The base... | 11/11/2008 |
| 7418783 | Clamping mechanism for tool holder For a spring sliding on the drawbar, the coil spring is used; the removal work for keeping the inner diameters of the coil springs aligned is performed such that the clearance between the outer diameter of the drawbar and the inner diameter of the coil spring become... | 09/02/2008 |
| 7416372 | Toolholder A toolholder (50) with a controllable critical angle, such as a lead, trailing, rake or clearance angles, includes a tool spindle (42a) for retaining the toolholder in a tool rest (42) of a machine tool. The machine tool (10) inclu... | 08/26/2008 |
| 7393311 | Monitoring method and system for a tool-holding spindle A sensor detects an axial position of a rod controlling a tool-gripping collet in a tool-holding spindle whenever a tool is picked during a working session. The current obtained rod position value is compared with previous rod position value, which has been obtained... | 07/01/2008 |
| 7393165 | Clamping device The invention relates to a clamping device for clamping a tool (8), or tool holder in a working spindle (4), in particular, of a machine tool, comprising a drawbar (10), arranged to be displaced within the working spindle (4), a clamping ... | 07/01/2008 |
| 7367891 | Techniques for controlling transfer of torque using detent members responsive to radial force A torque limiting device includes a base configured to reside in a fixed position relative to a drive unit, an input shaft assembly configured to receive a torque load from the drive unit, and an output shaft assembly which is capable of rotating about an axis. The ... | 05/06/2008 |
| 7367762 | Main spindle apparatus and tool holder clamp unit used therefor A main spindle apparatus has a main spindle having a through hole, a main spindle head rotatably supporting the main spindle therein, a tool holder clamp unit including an unit main body having a tool mounting hole to which a tool holder is mounted, a clamp mechanis... | 05/06/2008 |
| 7367097 | Tool mounting device for turning center There is provided an innovative tool mounting device for a turning center in which special manipulation is not required even with a simple configuration, and whereby when a cutting tool is clamped/fixed, the bearing unit is deformed by the retraction force of the dr... | 05/06/2008 |
| 7367238 | Test apparatus using a pneumatic collet and method to clamp a bar A pneumatic collet assembly has a housing, a piston, a collet, and ball bearings. The piston is disposed within the housing. A bore within the piston receives the collet. The collet has a base and fingers. The fingers of the collet define a center channel or bore co... | 05/06/2008 |
| 7360977 | Machine tool gear mechanism A machine tool transmission, in particular a spindle transmission, with which the force and/or the torque transfer from an output shaft (3) of a transmission (1) takes place directly on a spindle (15). The spindle (15) is placed co-axiall... | 04/22/2008 |
| 7357608 | Rotary tapered tool holder A rotary tapered tool holder includes a shank including a front mounting portion and an aperture. An expansion sleeve is disposed about a portion of the shank. The expansion sleeve includes a front mounting portion adjacent the front mounting portion of the shank. A... | 04/15/2008 |
| 7347807 | Machine tool and method for changing tools on this machine tool In the case of a machine tool which comprises at least one working spindle with a tool-holding fixture for tool holders carrying tools, and a tool changer with a gripper for the tool holders in order to transfer the tool holders between their magazine position, whic... | 03/25/2008 |
| 7338419 | Tool coupler for connecting tool heads, such as drills, reamers, millers, turn-cutters, dies, and rams, to a tool holder A tool coupler for connecting tool heads, such as drills, reamers, millers, turn-cutters, dies, and rams, to a tool holder. The tool coupler has a hollow shaft, a ring-shaped collar, and a gripper groove, in which gripper groove are disposed two diametrically opposi... | 03/04/2008 |
| 7338420 | Versatile toolholder for numerically controlled machine tool for holding tool through collet A versatile toolholder system is provided that is used by a numerically controlled machine tool. The toolholder system has an attachment portion that has a standardized shape to allow the toolholder to be used by conventional numerically controlled machine tools. Th... | 03/04/2008 |
| 7331742 | Spindle unit of machine tool A hollow portion of a spindle through which a draw bar and a disc spring assembly are inserted has a closed chamber structure and constitutes an oil pool chamber in which a lubricating oil is filled. The bearing portions that support the draw bar in the oil pool on ... | 02/19/2008 |
| 7326010 | Motor spindle A motor spindle for machine tool. The motor spindle having a spindle housing mounted on a machine part, a work spindle supported in the spindle housing in axially spaced roller bearings, an electric drive motor the stator of which is fixed in the spindle housing and... | 02/05/2008 |
| 7320567 | Clamping device The invention relates to a clamping device for clamping a tool (8), or tool holder in a working spindle (4), in particular, of a machine tool, comprising a drawbar (10), arranged to be displaced within the working spindle (4), a clamping ... | 01/22/2008 |
| 7318692 | Spindle for a machine tool with improved tool ejection feature A spindle unit for a machine tool includes a drive unit having a drive shaft and a spindle head assembly constructed for receiving a tool and having a hollow spindle head shaft driven by the drive unit. Arranged for axial displacement in the hollow spindle head shaf... | 01/15/2008 |
| 7311482 | Main shaft device and machine tool with the same An object of the invention is to provide a spindle apparatus which facilitates assembling and removing operations at the time of maintenance and which is low cost. In the invention, the diameter becomes smaller in the order of an inner peripheral diameter of an oute... | 12/25/2007 |
| 7290968 | Extension fixture for turning tool An extension fixture for a turning tool includes a shank, a pull rod, a clamping sleeve, and a fixing member. Thus, the fixing member presses the rotation head of the pull rod to prevent the pull rod from being rotated, thereby preventing the clamping sleeve from be... | 11/06/2007 |
| 7287940 | Device for fixing a tool on a shaft and machine spindle comprising same The invention concerns a device (1) for fixing a tool on a shaft (2), comprising a drawbar (3) which can slide axially inside the shaft (2) and which is used to releasably lock tools fixed on the shaft (2), in particular for automa... | 10/30/2007 |
| 7287941 | Apparatus for amplifying the pull back force on a lock rod used to secure a toolholder An apparatus for pneumatically amplifying the force acting upon a lock rod to retain a toolholder within a toolholder receiving member has a spindle extending from the toolholder receiving member and at least two in-line dual acting piston/cylinder modules within a ... | 10/30/2007 |
| 7284460 | Balancer A weight 4 which is held by a weight holder 3 in a balancer has a pressing face 4b′ which is pressed against a guide face 12a provided along the circumferential direction of rotation of the weight holder 3 by centri... | 10/23/2007 |
| 7281331 | Spindle assembly for machine tools and method of fabricating same A spindle assembly for a machine tool comprising a housing having at least one bearing seat, a bearing having inner and outer races mounted in the bearing seat, a sleeve disposed between a race of the bearing and the housing, adhesively bonded to the housing, and a ... | 10/16/2007 |
| 7278196 | Interlocking tool holder An end mill chucking structure for chucking an end mill. The chucking structure includes an end mill holder; a shank receivable in an axial opening in the holder; a cone having an exterior cone shape adapted to be received in a drive spindle and an axial opening tha... | 10/09/2007 |
| 7273994 | Electrical discharge machine for improving the guide alignment base structure An electrical discharge machine for improving the guide alignment base structure consisting of a guide alignment base having vertical threaded holes. Furthermore, the guide alignment base has axial adjustment holes that are respectively aligned with the vertical thr... | 09/25/2007 |
| 7252467 | Spindle collet chuck A collet chuck configured to connect to a standard milling machine spindle, wherein the collet chuck includes a centering sleeve having a tapered outer peripheral surface for contact with an inside peripheral tapered surface of the spindle and has an outer end dispo... | 08/07/2007 |
| 7249919 | Release device for actuating a clamping device for tools A release device for actuating a clamping device for tools has at least one release element and a drive drivingly connected to the at least one release element for moving the at least one release element from a rest position into a release position in which a draw b... | 07/31/2007 |
| 7244083 | Cutting head assembly A cutting head assembly for use in cutting plate glass has a simplified drive train, all positioned about the vertical rotational centerline. The drive train includes a hollow bore drive motor having a drive adaptor directly engaged with a spline shaft that extends ... | 07/17/2007 |
| 7234902 | Milling tool holder with camming plug A milling tool holder apparatus includes a tool holder having a male structure received in a female opening of a shank, and a camming plug received in a transverse plug-receiving opening in the shank and the tool holder. Turning the camming plug in one direction mov... | 06/26/2007 |
| 7226256 | Machine tool having inbuilt water supplier A machine tool includes a base having a spindle rotatably attached to a support for supporting a tool member, and a fluid supplying device for supplying fluid into the spindle, for cooling purposes. The fluid supplying device includes a housing secured to the suppor... | 06/05/2007 |
| 7220089 | Tool mounting device for turning center To provide a tool mounting device for a turning center that allows a rotating tool to be clamped/fixed using a shared clamp mechanism (8), and a turning tool (1B) to be clamped/fixed in an engaged/locked state in a turning center. In the turning center... | 05/22/2007 |
| 7217230 | Apparatus for detecting position of drawbar in automatic tool change device Disclosed is an apparatus for detecting a position of a drawbar unit installed in a spindle unit. The apparatus is a part of an automatic tool exchange device for exchanging tools in the spindle unit of a machine tool. The apparatus transmits a signal to a main cont... | 05/15/2007 |
| 7201547 | Opening actuator for collet chuck A chuck actuator has a hollow housing having a chamber and having a front end and a rear end. A ring in the chamber forms with the front end thereof a front compartment and a piston in the chamber between the ring and the rear end forms an intermediate compartment w... | 04/10/2007 |
| 7195431 | Clamping device The invention relates to a device for clamping a hollow shaft tool (1) or tool holder provided with a conical hollow shaft (3) in a machine spindle (2) provided with a taper bore (4), especially for use in a machine tool. The device compr... | 03/27/2007 |
| 7192226 | Shrink fit holder and methods of drilling and reaming A drill has a unitary drill bit and chuck structure that includes a drill bit and a chuck. The chuck encloses a portion of the drill bit and has a thread. A rotatable drive element having a thread engages the thread of the chuck. The chuck is heat shrunk onto the dr... | 03/20/2007 |