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| Number | Title | Issue Date |
| 7395874 | Slaving and blocking device 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 unit fixable on the driving part fixed against relative rotation and having slaving claws... | 07/08/2008 |
| 7372228 | Electric power tool with memory capability The invention relates to an electric power tool having a control and/or regulating device for an electric motor. It is provided that the control and/or regulating device (4) is assigned an electronic memory element (5) for at least one operating state ... | 05/13/2008 |
| 7322418 | Continuous circulation drilling method A method for drilling wells in which the tubular can be added or removed from the drill string whilst mud and drilling fluids being circulated continuously and kept separated from the environment to reduce pollution. A connector is used with an inlet and outlet for ... | 01/29/2008 |
| 7304241 | Swivel connector, cable, and assembly An assembly having a connector capable of rotating up to about +/−170 degrees; and a plurality of conductors, sized in the range of gauge 22 to gauge 26. ... | 12/04/2007 |
| 7260998 | Apparatuses and methods for structurally testing fasteners Apparatuses and methods for structurally testing fasteners are described herein. A fastener test apparatus configured in accordance with one aspect of the invention includes a first support member configured to support a head portion of a fastener, and a second supp... | 08/28/2007 |
| 7249526 | Torque detection device for power tools A torque detection device on a power tool includes at least one resistive strain gauge connected to an outer periphery of the shaft which is rotatably received in the barrel of the tool and driven by a motor. At least one conductive collar is mounted to the shaft an... | 07/31/2007 |
| 7228899 | Warning device and method to prevent clutch burning This invention is generally directed towards a system designed to assist the rig operator by alerting him/her that the air pressure is too low to be using the drum clutch, to provide a log for studies on rig operation technique, and to provide a training tool for ri... | 06/12/2007 |
| 7146715 | Spin pressure power tool Apparatus for installing a rivet nut or the like having an intentionally threaded shaft wherein the apparatus includes a hydraulically geared power tool having an inner hydraulic fluid containing a chamber and a screw adapted to engage the threaded shaft of the nut ... | 12/12/2006 |
| 7108063 | Connectable rod system for driving downhole pumps for oil field installations Improved sucker rod joints for down hole petroleum pumping applications are provided within the form factor of standard API sucker rods, such that existing inventory in suitable condition is fully usable in more demanding applications. The pin ends are selected or p... | 09/19/2006 |
| 7086483 | Electric tool An electric tool having the capability of achieving a high working efficiency is provided. This tool comprises an output shaft rotated by reversible motor, a rotational-direction switch for switching a rotational direction of the output shaft in either forward or re... | 08/08/2006 |
| 7036605 | Power tools A detector is disclosed that detects impact sounds, e.g., a hammer striking an anvil or oil pulses from an oil unit. The detector may comprise a receiver that selectively converts sound within a narrow frequency range into electric signals. Preferably, the impact so... | 05/02/2006 |
| 7021180 | Torque sensing tool A torque applying tool such as a nutrunner or torque wrench incorporates torque sensors responsive to strain in a shaft mounting an output square drive head the strain being measured as it exists immediately adjacent the drive head. The shaft is a hollow quill shaft... | 04/04/2006 |
| 6923268 | Electric rotational tool driving switch system An electric or power rotational tool including a driving switch of a push operating system that switches the electric motor ON when the rotational tool contacts a work object such as a screw, etc. and is displaced by being pressed, and a driving switch of a lever op... | 08/02/2005 |
| 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 |
| 6871153 | Dynamic calibration qualifier This dynamic calibration qualifier relates to a tool monitor and assembly qualifier that verifies that the correct number of fasteners have been properly installed into an assembly. The device monitors an analog signature created by the tool and has the ability to d... | 03/22/2005 |
| 6848516 | Processes of determining torque output and controlling power impact tools using a torque transducer An impact tool having a control system for turning off a motor at a preselected torque level. ... | 02/01/2005 |
| 6763573 | Assembly system for monitoring proper fastening of an article of assembly at more than one location A more reliable and fool-proof method and apparatus for assembling an article of assembly (e.g. with predetermined screw torque requirements) in which the article of assembly has multiple fastening locations. The method comprises holding the article of assembly fixe... | 07/20/2004 |
| 6655471 | Impact tool control method and apparatus and impact tool using the same An impact tool control method and apparatus and an impact tool using the same. Pulses of torque applied to a fastener by the impact tool are measured. The duration and magnitude of the torque pulse are subtracted from a torque signal and the resulting dif... | 12/02/2003 |
| 6581696 | Processes of determining torque output and controlling power impact tools using a torque transducer An impact tool having a control system for turning off a motor at a preselected torque level.... | 06/24/2003 |
| 6539603 | Method for self-programming a power nutrunner control system during initial tightening processes A method for self-programming a computerized power nutrunner control system for tightening a number of similar screw joints to a desired final torque level (MF) is provided. The method includes the steps of: (i) tightening initially at a low sp... | 04/01/2003 |
| 6523442 | Torque tool assembly A torque tool assembly having an elongated unitary, cylindrical main housing and including a drive motor subassembly and a gear train subassembly coaxially supported and operatively connected in the cylindrical housing and held in operative engagement by ... | 02/25/2003 |
| 6378623 | Torque control type impact wrench A torque control type impact wrench includes a first storage section for storing an ideal upper limit of the pulsed torque for screwing a male screw into a female screw, as a first storage value, a second storage section for storing a driving speed at whi... | 04/30/2002 |
| 6311786 | Process of determining torque output and controlling power impact tools using impulse A process to more accurately determine torque output of power impact tools using impulse. Also disclosed are processes for controlling power impact tools, in particular a mechanical impact wrench, by determining the impulse of the tool impacts and derivin... | 11/06/2001 |
| 6212763 | Torque-turn system for a three-element sucker rod joint A sucker rod tool system for oil wells monitors both torque and angular displacement of a three-element sucker rod connection. The tool system engages two sucker rods that are at least partially screwed into opposite ends of a sucker rod coupling. The sys... | 04/10/2001 |
| 6047455 | Method for simultaneous tightening of two or more screw joints A method for simultaneous tightening of two or more screw joints to a desired pretension condition by means of a nut running tool having two or more output spindles each having an adjustable output torque, wherein each one of the output spindles is indivi... | 04/11/2000 |
| 6044918 | Percussion blow added manually operable drilling tool A percussion blow added manually operable drilling tool, such as a hammerdrill, has a housing (2) containing an electric motor for rotating a tool bit chuck (9) about its axis, a control device (C) for controlling the rpm of the chuck (9) operated by the ... | 04/04/2000 |
| 5937370 | Tool monitor and assembly qualifier This counting apparatus is a tool monitor and assembly qualifier that verifies that the correct number of fasteners have been properly installed into an assembly. When used in conjunction with a pressure tool, proper fastener torque and count can be verif... | 08/10/1999 |
| 5893420 | Multi-core cable connector for power wrench A cable connector for assembly and mounting on a front section of a housing of a power wrench is arranged to connect at least one operation parameter sensor of the power tool to a multi-core cable. The cable connector includes a multi-contact cable connec... | 04/13/1999 |
| 5715894 | Impact screw-tightening apparatus An impact screw-tightening apparatus is comprised of a main body and a controller. The main body includes a motor outputting pulsed drive output, a main shaft driven by the drive and connected to a screw to be tightened, and a torque detector detecting a ... | 02/10/1998 |
| 5535867 | Torque regulating coupling A torque regulating coupling for use with an impact wrench drive and socket, the coupling for connecting an impact wrench drive to the a wrench socket used to tighten threaded fasteners so that the maximum torque applied to the fastener can be limited to ... | 07/16/1996 |
| 5366026 | Impact type clamping apparatus In an impact type clamping apparatus including a motor unit for generating a pulsatory driving torque, a main spindle driven by said pulsatory driving torque to rotate a fastening member, a detecting unit for detecting a pulsatory torque applied to the ma... | 11/22/1994 |
| 5181575 | Impact wrench having torque controlling faculty An impact wrench with a torque controlling faculty including an air motor for generating a primary torque, an oil pressure pulse generating unit for converting the primary torque into a pulsatory secondary torque, a main spindle to which the pulsatory sec... | 01/26/1993 |
| 5154242 | Power tools with multi-stage tightening torque control A power tool includes a DC motor for tightening a fastener through three consecutive stages. In the first stage, the motor is rotated at a high speed to tighten the fastener to a pre-seated condition which is acknowledged by the tool. Then, the motor is t... | 10/13/1992 |
| 4987806 | Electronic control circuitry for a nutrunner Generally there is provided a nutrunner appliance for automatically driving a nut having an electrical motor, gearing, and a strain gauge to monitor the applied torque. The control system employs analog comparator circuits acting on analog signals from th... | 01/29/1991 |
| 4444273 | Torque control system for catheads A novel system controls accurately the torque applied to threaded connections by a cathead operating on a tong arm, usually a manual tong. A strain gage/transducer in the catline measures the pull on the tong arm and applies a signal to an electric meter ... | 04/24/1984 |
| 4305472 | Apparatus for recording and limiting torque Apparatus for recording and limiting the torque applied to a pipe by a set of power tongs, wherein the tongs are operated by a hydraulic fluid pumped through a feed line to a hydraulic motor in the tongs and then returned by a return line. The apparatus i... | 12/15/1981 |
| 4244245 | Fastener tension control system A method and apparatus for controlling final tension on a fastener being run up and set. An efficiency factor is developed and utilized for attaining predetermined final tension on a fastener, or a group of similar fasteners, being operated upon. The effi... | 01/13/1981 |
| 4110829 | Apparatus for and method of determining rotational and linear stiffness A meter for determining stiffness or torque gradient including, in one embodiment, a deflectable coupling connected between an output shaft and a power input shaft, sensing means for developing two separate series of signals representative of the displace... | 08/29/1978 |
| 4060137 | Torque wrench A torque wrench is presented having bidirectional operating capability, accurate readout, and preset or load selection capability. The input drives a pair of ring gears, one of which is connected to the output of the wrench and the other of which is part ... | 11/29/1977 |
| 3982419 | Apparatus for and method of determining rotational and linear stiffness A meter for determining stiffness or torque gradient including, in one embodiment, a deflectable coupling connected between an output shaft and a power input shaft, sensing means for developing two separate series of signals representative of the displace... | 09/28/1976 |
