Matches 1 - 50 out of 57 1 2 >
Match Document Document Title
7575398 Automatic spotter with electronic control system for pile driving and continuous flight auger drilling leads  
A lifting device such as a mobile crane having a main body and a boom, such as a lattice boom, for supporting a pile lead for, e.g., pile driving or continuous flight auger drilling, and a method...
7556103 Tightening tool and tightening tool management system  
A fastening tool with a clutch for shutting off transmission of torque, capable of self-diagnosing fastening torque of a screw or the like at low cost without using expensive elements such as a...
7487845 Safety mechanism for a rotary hammer  
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...
7467669 Method for governing the operation of a pneumatic impulse wrench and a power screw joint tightening tool system  
A method and a power tool system are provided for performing screw joint tightening using a pneumatic torque impulse power tool that is controlled by a control unit. A torque magnitude and a torque...
7453225 Impulse wrench with angle sensing means  
In an impulse wrench there is provided an impulse unit with a motor driven inertia drive member, and a movement detecting device arranged to detect an angular movement of the inertia drive member....
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 (φ 0 ) of an impulse nut runner at tightening a screw joint to a predetermined final torque level (T f ) by an impulse nut...
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...
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...
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...
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:...
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...
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...
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...
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...
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.
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 )...
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...
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...
6371218 Impact-driven rotating device  
An impact-driven rotating device includes an output shaft, a hammer for rotating the output shaft by imparting an impact to the output shaft, a rotation driver for rotating the hammer, an impact...
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...
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,...
6161629 Power wrench  
A power screwdriver has a drive unit and an input circuit for inputting screw size, material quality, pitch, and clamping length of a screw. An evaluation circuit is provided for determining a...
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....
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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....
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...
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...
4609089 Impact wrench for tightening to a desired level  
An impact wrench including a hammer and an anvil to which impacts are imparted by the hammer, the impact wrench comprising a pair of sensors located at a stationary section of the wrench wherein...
4571696 Electronically controlled screwdriver with quality check indicator  
Backwards counters (11,12) are preset with upper and lower limits of the angle through which screws are to be driven, the counters being loaded when a certain value of torque is reached, at which...
4502549 Spring-coupled power screwdriver  
A helical spring couples a drive shaft geared to the motor with the work spindle. With this arrangement hard screwdriving operations can be extended in time so that time is added for the drive...
RE31569 Tension control of fasteners  
There is disclosed a technique for tightening threaded fasteners in which values of offset torque, initial tension rate relative to angle, final tension rate relative to angle and other joint...
4427077 Portable fastening tool with manual turn on and automatic shut off  
A portable fastening tool of the type incorporating torque and angle sensors is connected to a data processor which analyzes the torque and angle sensings and generates a shut off signal to...
4375123 Method and apparatus for tightening threaded fastener assemblies  
Apparatus and method for tightening assemblies held together by threaded fasteners. Prior to tightening, the gradients of a selected number of possible torque-rotation curves for the assembly are...
4344216 Apparatus and method for tightening an assembly  
Apparatus and method for tightening assemblies held together by threaded fasteners. The desired tightened condition is achieved by turning the threaded fastener through a precise tightening angle...
4316512 Impact wrench  
A self-contained impact wrench having an adaptive control system for determining the yield point or some similarly significant tightened condition of a fastener assembly by detecting a signal...
4305471 Simplified fastening technique using the logarithmic rate method  
A fastening tool, which is preferably portable, incorporates torque and angle sensors connected to an analog calculating circuit which determines, while tightening below the yield point of any...
4185701 Tightening apparatus  
An impact wrench having an adaptive control system for determining the yield point or some similarly significant point of a fastener assembly by detecting a signal representative of the peak...
4106570 Angle sensing tool for applying torque  
There is disclosed an air powered tool for applying torque to threaded fasteners and the like. The tool comprises a motor, a gear reducer and a driver whereby the motor turns at a higher rate than...
4104778 Method and apparatus for fastener tensioning  
A fastener tensioning method and apparatus for obtaining a desired degree of tension in a fastener. The apparatus includes a means for applying rotation to a fastener, a means for measuring the...
4027530 Simplified apparatus for and method of tightening fasteners  
The invention disclosed herein relates to a tightening system for tightening an assembly including a threaded fastener including a wrench for applying torque and imparting rotation to the fastener....
Matches 1 - 50 out of 57 1 2 >