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| Number | Title | Issue Date |
| 7410009 | Power tool It is an object of the present invention to provide an improved technique for preventing leakage of lubricant from an accommodating space that houses a driving mechanism, while regulating the internal pressure of the accommodating space in a power tool. A representa... | 08/12/2008 |
| 7360311 | Drive mechanism for power tool A drive mechanism for a power tool having a housing, a motor, and an output shaft moving in a reciprocating motion. The drive mechanism comprises a gear plate (34) adapted to rotate about a first axis (Z-Z) and having a plurality of elongate first teeth (3... | 04/22/2008 |
| 7320374 | Wellbore top drive systems A system for wellbore operations, the system, in at least certain aspects, including a derrick, a guide beam connected to the derrick, a top drive movable on the guide beam, torque reaction structure connected to the guide beam and to the derrick, skid apparatus hel... | 01/22/2008 |
| 7318691 | Tool apparatus for milling machine The present invention provides an automated-torque controlled tool for attachment to a milling machine. The tool comprises an elongated hollow housing defined by a neck section, a middle section, and a bottom section. The neck section is adapted to engage a spindle ... | 01/15/2008 |
| 7306050 | Toothed ring connecting structure of a power tool A toothed ring connecting structure of a power tool, including: a main body having a first opening and a second opening; a motor accommodated in the main body and having an output shaft extending from a first end of the motor; a fixing cap having a body section, a f... | 12/11/2007 |
| 7300035 | Valve, actuator and control system therefor A valve actuator comprising a lower housing comprising a mounting spool that is operable to couple to a valve body. A rotating sleeve is disposed within the lower housing and coupled to a stem connector. A fixed sleeve in disposed within the lower housing and includ... | 11/27/2007 |
| 7287602 | Spindle lock for rotary power tool A slaving and blocking device for transmitting a torque from a driving part to a driven part and for stopping the driven part at a torque engaging the driven part has a slaving element fixable on the driving part and having slaving claws offset from one another in a... | 10/30/2007 |
| 7275325 | Bush cutting machine A bush cutting machine with a tubular operating pole connected to an outlet of an exhaust muffler and doubling as an exhaust passage is provided. Exhaust gases discharged from an engine flow from the exhaust muffler through the operating pole and are then discharged... | 10/02/2007 |
| 7258173 | Electric power tool An electric power tool includes a percussion mechanism (15) located in an external housing (12) of the power tool (11) and driven by a driving motor (13) connected with the percussion mechanism (15) by a gear unit (14). An a... | 08/21/2007 |
| 7231969 | Wellbore top drive power systems and methods of use A top drive system having a drive motor, a gear system coupled to the drive motor, a drive quill coupled to the gear system, a top drive support system for supporting the drive motor, the gear system, and the drive quill, a lower support apparatus connected to the t... | 06/19/2007 |
| 7228913 | Tubular clamp apparatus for top drives and methods of use An apparatus for releasably clamping and holding a member for wellbore operations, the apparatus having a main body, two opposed clamping apparatuses in the main body, the two opposed clamping apparatuses spaced-apart for selective receipt therebetween of a member t... | 06/12/2007 |
| 7222683 | Wellbore top drive systems An containerized top drive system including a container, top drive apparatus removably disposed within the container, an extension system for moving the top drive apparatus generally horizontally within a derrick, the top drive apparatus secured to the extension sys... | 05/29/2007 |
| 7213656 | Apparatus and method for facilitating the connection of tubulars using a top drive An apparatus and method for facilitating the connection of tubulars using a top drive and is, more particularly but not exclusively, intended for facilitating the connection of a section or stand of casing to a string of casing. ... | 05/08/2007 |
| 7188686 | Top drive systems A top drive system for wellbore operations including a hollow bore alternating current permanent magnet motor with a motor bore therethrough, a planetary gear system coupled to the motor, the gear system having a gear system bore therethrough, a quill drivingly conn... | 03/13/2007 |
| 7168504 | Rotary hammer including breather port A rotary hammer and a power tool. The rotary hammer is operable in an idle mode and a hammer mode and comprises a housing and a barrel positioned in the housing and having a forward portion. A ram is positioned within the barrel and is movable relative to the barrel... | 01/30/2007 |
| 7165302 | Spindle device of machine tool and method of replacing spindle A spindle device of a machine tool such as a milling machine and a machining center and a method of replacing a spindle, the spindle device wherein the housing of a spindle head (5) is divided into a front housing (23) and a rear housing (25), a... | 01/23/2007 |
| 7165609 | Apparatus for handling tubular goods An apparatus for handling tubular goods which includes an elongate tubular body having a peripheral sidewall and opposed ends. The peripheral sidewall has a plurality of axial slots arranged circumferentially around the tubular body parallel to an axis of the tubula... | 01/23/2007 |
| 7083003 | Power tool with detachable drive end A rotary tool includes a housing structure with a plurality of apertures therein, drive mechanism disposed within the housing structure, a detachable drive end mechanism coupled to the drive mechanism, and a retaining structure received by the apertures. The drive m... | 08/01/2006 |
| 7073598 | Apparatus and methods for tubular makeup interlock The present invention provides for an apparatus and methods to prevent an operator from inadvertently dropping a string into a wellbore during assembling and disassembling of tubulars. Additionally, the apparatus and methods can be used to for running in casing, run... | 07/11/2006 |
| 7063173 | Spindle unit with switchable gear, and method for using the spindle unit A system and a method are described that facilitate gear switching of a motor-driven spindle. A spindle head shaft is driven by a drive shaft via a gear mechanism in a first gear position. The drive shaft, including a rotor, can be switched from the first gear posit... | 06/20/2006 |
| 7021374 | Method and apparatus for connecting tubulars using a top drive An apparatus for facilitating the connection of tubulars, said apparatus comprising a winch (15), at least one wire line (4, 5), and a device (2) for gripping the tubular (3), the arrangement being such that, in use, the winch (15)... | 04/04/2006 |
| 7013987 | Clutch assembly and clamp mechanism for rotary tool disc As system for clamping an rotary tool accessory disc or blade to an output shaft of a rotary tool comprising a cam clamping mechanism and a clutch assembly wherein the cam clamping mechanism comprises: a head element threadably engageable with the output shaft at a ... | 03/21/2006 |
| 7004259 | Apparatus and method for facilitating the connection of tubulars using a top drive An apparatus for facilitating the connection of tubulars using a top drive, the apparatus comprising a supporting member (13) connectable to said top drive (3) characterized in that it further comprises an internal tool (30) for engaging said tu... | 02/28/2006 |
| 6951256 | Machine tool having coaxial driving device A machine tool includes a housing slidably supported on a table, a moving device may be used to move the housing up and down relative to the table, a tubular shaft is rotatably received within the housing and includes a bore to receive a chuck device which may coupl... | 10/04/2005 |
| 6935440 | Service rig with torque carrier A service rig, comprising a mast, a torque carrier suspended from the mast; and a brace having a torque carrier end connected to the torque carrier for conveying torque from the torque carrier into the brace and an anchored end with a fastener for attaching the brac... | 08/30/2005 |
| 6918449 | Magnetic impact tool There is provided a magnetic impact tool comprising a magnetic hammer driven by a motor, a magnetic anvil disposed so as to face the magnetic hammer, an output shaft that rotates together with the magnetic anvil, a magnetic bypass device for distributing magnetic fl... | 07/19/2005 |
| 6915868 | Elevator apparatus and method for running well bore tubing An elevator apparatus for manipulating well bore tubing includes a circular body having a top and a central cavity around a body axis. The cavity has a diameter allowing the collar portion of the tubing to pass longitudinally therethrough. A plurality of cavity rest... | 07/12/2005 |
| 6910836 | Impact driver for rotary tools Method and apparatus for improving the efficiency of the rotating cutter of a tool by converting at least part of the rotational torque applied to the cutter to repeated rotational impact forces. ... | 06/28/2005 |
| 6902093 | Centering punch A centering punch includes a first body, a second body, a punching head, an elastic body, an elastic member, a push member, and a spring. Thus, the tapered portion of the punching head is moved along the tapered face of the first body, and the punching head is moved... | 06/07/2005 |
| 6902013 | Electric power tool with a plurality of operational component groups accommodated in separate housings An electric power tool has a plurality of operational component groups; a plurality of separate housings which accommodate the operational component groups, the housings being couplable with one another in series, at least one of the housings being composed of a syn... | 06/07/2005 |
| 6871711 | Portable power tool with grease lubricated angle gear drive A power tool of the type comprises a housing (10), a rotation motor (11), an output shaft (12) carrying and rotating a working implement, and a grease lubricated angle drive (13) coupling the output shaft (12) to the motor (11 | 03/29/2005 |
| 6863135 | Electric power tool Disclosed is an electric power tool having a gear mechanism, which reduces a noise by absorbing collision of gears and is resistible to a high torque. A power transmission key 7 composed of high-strength plastic is provided between an output shaft 3 an... | 03/08/2005 |
| 6810970 | Hand power tool A hand power tool has housing, a motor arranged in the housing and having a drive shaft with two opposite ends, bearings each supporting one of the ends of the drive shaft in at least one component, an insert tool, a drive element through which the drive shaft is op... | 11/02/2004 |
| 6739406 | Machine tool with a chamber for lubricating agent and a pressure equalization device for said chamber The present invention is directed to a machine tool, in particular to a hand-operated hammer drill, having a compartment (10) containing lubricant in which at least one rotationally drivable component (12) is mounted and having a device (14) for... | 05/25/2004 |
| 6739410 | Sonic drill head A sonic drilling head includes a spindle which is both rotated and vibrated at sonic frequency to effect ground penetration of members such as drill rods, etc. Two pairs of rotating eccentric masses are mounted in a sine generator housing. The pairs of masses have i... | 05/25/2004 |
| 6722449 | Machine tool with a chamber for lubricant agent and a pressure equalization device for said chamber A machine tool, in particular to a hand-operated hammer drill, having a compartment containing lubricant and a device for compensation of the pressure in the compartment in the area of a bearing of a component able to be driven so as to allow rotation. It is propose... | 04/20/2004 |
| 6712157 | Portable power tool with rotation motor and grease lubricated angle drive A power tool of the type comprises a housing (10), a rotation motor (11), an output shaft (12) carrying and rotating a working implement, and a grease lubricated angle drive (13) coupling the output shaft (12) to the motor (11 | 03/30/2004 |
| 6702038 | Hydraulic motor A hydraulic motor, especially for driving of rotating tools, consisting of a chamber (2) provided with an inlet (10) for supplying fluid, and with at least one outlet hole (6), before which, on a holding device, a rolling rotor (7) is seated, the rolling ... | 03/09/2004 |
| 6698533 | Portable power tool with grease lubricated angle drive A portable power tool is provided which includes a housing having an angle drive chamber, a rotation motor, an output spindle, and a grease lubricated angle drive that is located in the angle drive chamber and that includes a drive pinion connected to the... | 03/02/2004 |
| 6695071 | Drill head assembly A drill head for holding a drill steel includes a drill housing having an internal cavity defined by an upper opening and a lower portion with a lower opening extending therethrough. The internal cavity includes a pair of concentric axially aligned sleeve... | 02/24/2004 |
