Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 7424919 | Method for determining the angular movement of the output shaft of an impulse nut runner at tightening a screw joint A method for determining the angular displacement of the output shaft (φ0) of an impulse nut runner at tightening a screw joint to a predetermined final torque level (Tf) by an impulse nut runner having a motor driven impulse unit (23) ... | 09/16/2008 |
| 7395871 | Method for detecting a bit jam condition using a freely rotatable inertial mass An improved method is provided for controlling a power tool having a rotary shaft. The method includes: disposing an inertial mass in a housing of the power tool, such that the inertial mass is freely rotatable about an axis of rotation which is axially aligned with... | 07/08/2008 |
| 7362066 | Overload protection system An overload protection system and method of protecting a drive unit includes a torque arm assembly mounted to a fixture and a gear reducer. The reducer includes a bracket mounted to an axle of the reducer which is positioned adjacent to a measuring device. The torqu... | 04/22/2008 |
| 7234536 | Power screwdriver A power screwdriver is disclosed having a drive which is coupled via a clutch, disengaging as a function of torque, to a tool drive shaft for driving a tool. The screwdriver comprises an electronic control unit for controlling the drive, and a sensor which is couple... | 06/26/2007 |
| 7152693 | Password security utility A resource manager (14, 16) of a content management system (10) is configured to receive a client request (34, 36) pertaining to information and to access at least one of a plurality of data servers (20, 22, 24, 26) to execute the client ... | 12/26/2006 |
| 7109675 | Power tools Battery-powered tools may include battery 1 or battery pack BP and a drive source (e.g., motor M) for generating power using current supplied from the battery. A switch 3 may electrically connect the battery to the drive source. A voltage detector may ... | 09/19/2006 |
| 7090031 | Intelligent tightening spindle with integrated measurement transducer, servo amplifier, and data processing unit An intelligent tightening spindle comprises a drive output; a housing adapted to detachably mount to a moving platform of a multi-tool processing station, with the housing substantially enclosing: at least one electric drive motor having an associated servo amplifie... | 08/15/2006 |
| 7090030 | Tranducerized torque wrench Disclosed herein is a variable speed tool useful for use with securing or removing industrial fasteners. The tool also includes a means to torque the fastener to a certain precise torque. The tool can be used with an associated controller that provides control comma... | 08/15/2006 |
| 7068000 | Torque control device for electrical tools A torque control device for an electrical tool has a switching circuit, a voltage detecting circuit, a torque detecting circuit and a processor. The switching circuit connects between a motor of the electrical tool and a DC voltage source. The voltage detecting circ... | 06/27/2006 |
| 7062979 | Tool and associated methods for controllably applying torque to a fastener A torque tool and an associated method are provided which apply operator-defined levels of torque to a threaded fastener. In one aspect, a portable, battery powered torque tool controls the motor to slow further advancement of the threaded fastener once the torque t... | 06/20/2006 |
| 7063171 | Motor-driven rotary tool with internal heating temperature detecting function An electric motor-driven rotary tool with an elevated temperature detection function, provided by a temperature sensor, connected to a power shut off device, for shutting off power to the tool, in order to prevent injury, such as low temperature burn, from occurring... | 06/20/2006 |
| 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 |
| 7007762 | Power tool It is an object of the present invention to provide a technique to increase efficiency of the output torque of the blushless motor to drive a power tool. A representative power tool may comprise a tool bit, a brushless motor to drive the tool bit, a battery to opera... | 03/07/2006 |
| 6978846 | Power tool used for fastening screw or bolt In a power impact tool for fastening a screw or a bolt, malfunction that driving of a motor is stopped before the screw or the bolt is fastened completely can be prevented. A fastening judger judged that the fastening operation is completed at least when a torque va... | 12/27/2005 |
| 6968908 | Power tools Power tool (11) may include a motor and oil pulse unit (22) that generates an elevated torque. Oil pulse unit (22) may be coupled to the motor and have output shaft (18). When load acting on output shaft (18) is less than a predete... | 11/29/2005 |
| 6945337 | Power impact tool In a power impact tool for fastening a fastening member, a torque for fastening the fastening member can be estimated without using a high-resolution sensor and a high-speed processor. The power impact tool comprises a rotation speed sensor for sensing a rotation sp... | 09/20/2005 |
| 6941817 | Shaft delashing method and assembly with wireless interface A delashing assembly includes a tightening device for tightening a nut in relation to a main shaft supported on bearings and a wireless interface, wherein torque information is received by the tightening device over the wireless interface. A main shaft and main nut ... | 09/13/2005 |
| 6892826 | 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. ... | 05/17/2005 |
| 6843326 | Method and apparatus for determining when a fastener is tightened to a predetermined tightness by a pulse output tightening tool, and a pulsed output tightening tool incorporating the apparatus An impact wrench (1) comprising an output shaft (5) for receiving a socket or other fastener engaging element for tightening a fastener is powered by a pneumatic motor (11). Apparatus (20) for determining when the fastener has been tighte... | 01/18/2005 |
| 6782594 | Method and apparatus for auditing a tension load in the threaded fastener The present invention is directed towards a method and an apparatus for accurately estimating the tension or clamp force in a bolted joint. An installed fastener is rotated and the torque necessary to rotate the fastener and the angle through which the fastener is r... | 08/31/2004 |
| 6761229 | Impact tool control 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 difference is ... | 07/13/2004 |
| 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 |
| 6341533 | Method for determining the installed torque in a screw joint at impulse tightening and a torque impulse tool for tightening a screw joint to a predetermined torque level A basic method is provided for determining the installed torque in a screw joint which is being tightened by a series of repeated torque impulses, wherein the rotational movement of the screw joint is detected during each impulse, the point in which the s... | 01/29/2002 |
| 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 |
| 6134973 | Method for determining the installed torque in a screw joint at impulse tightening and a torque impulse tool for tightening a screw joint to a predetermined torque level A basic method is provided for determining the installed torque in a screw joint which is being tightened by a series of repeated torque impulses. The rotational movement of the screw joint is detected during each impulse. The point in which the screw joi... | 10/24/2000 |
| 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 |
| 5848655 | Oscillating mass-based tool with dual stiffness spring Disclosed is a low reaction oscillating mass-based torquing tool wherein an oscillating mass is excited into near resonant oscillation by reversing pulses resulting in increased energy stored in oscillation about a dual stiffness spring which develops a h... | 12/15/1998 |
| 5845718 | Resonant oscillating mass-based torquing tool Disclosed is a low reaction oscillating mass-based torquing tool wherein an oscillating mass is excited into near resonant oscillation by reversing pulses resulting in increased oscillation about a torsion spring to the point where the torque associated w... | 12/08/1998 |
| 5651419 | Powered hand tool A hand-held machine tool has a housing having a wall provided with a duct, a motor arranged in the housing and having a gear unit with a spindle, a tool holder carried by the spindle, and an electric lead extending in the duct of the wall of the housing, ... | 07/29/1997 |
| 5492185 | Impulse wrench An impulse wrench comprises a pneumatic rotation motor (12), a hydraulic torque impulse generator (13) provided with an impulse magnitude responsive actuator (17), a linear movement responsive electric signal producing device (25) located at the rear end ... | 02/20/1996 |
| 5457866 | Bolt-tightening method using an impact wrench The present invention provides an impact wrench and a bolt-tightening method such that a spring force is applied, through the circumference of a spindle coupled with the output shaft of an electric motor, in the forward direction to a hammer which is capa... | 10/17/1995 |
| 5285857 | Nut runner for clamping bolts with predetermined torque and bolt clamping method In order to prevent a looseness of bolts after main clamping, a nut runner of the present invention comprises a torque sensor for detecting a clamping torque T of a clamping unit, and a torque comparison means for comparing the clamping torque T with a cl... | 02/15/1994 |
| 5005654 | High torque hydraulic shoe bolt wrench A hydraulic shoe bolt wrench used to mount and remove shoe bolts which secure shoes to a track chain. The apparatus comprises a vertical cylinder stood upright on a frame moving on a work table, a main frame secured to a piston rod of the vertical cylinde... | 04/09/1991 |
| 4961035 | Rotational angle control of screw tightening The turn-of-nut tightening method that is improved by determining the starting point only through measurements of the angle and time relationship to determine the linear portion of the tightening curve, which is extended to the previous free running speed... | 10/02/1990 |
| 4911581 | Pre-cast concrete pile and method and apparatus for its introduction into the ground An apparatus for screwing a concrete pile (10) into ground comprises a rotary drive (26, 40, 42) and a linear drive (46, 48) both acting on the pile. An angle indicator (58) is associated to the rotary drive (26, 40, 42) and a linear position indicator co... | 03/27/1990 |
| 4894767 | Method for yield tightening of screws A method for yield tightening of screws by use of a wrench including a device for detecting a tightening torque in the actual tightening process, a device for detecting a tightening angle and an electric motor for applying a torque to each screw, a device... | 01/16/1990 |
| 4730254 | Drill string make-up and breakout torque control system and apparatus A system and apparatus for the monitoring and control of torque applied during make-up and breakout of drill string components. The force applied by the cat head to the tong is measured by a hydraulic load cell and the horizontal and vertical angles betwe... | 03/08/1988 |
| 4685050 | Method of tightening threaded fasteners The invention is directed to a method for tightening threaded fasteners by means of a controlled fastener-driving tool. The tightening of the fasteners is controlled by the elastic limit thereof. The slope of the actual load-strain characteristic curve is... | 08/04/1987 |
| 4648282 | Power screwdriver A power screwdriver or nutsetter has an output shaft provided with a torque measuring transducer and a shaft rotation angle transducer mounted thereon. Tool output torque or final turning of a screw or nut can be measured directly and transmitted to a con... | 03/10/1987 |
| 4638870 | Motor driven hand-held device containing a displacement mass A motor driven hand-held device for rotating a tool, includes a housing with an axis of rotation containing an electrically conductive liquid mass located within a sealed non-electrically conductive container. A magnetic field is established in the housin... | 01/27/1987 |