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Class 173/5 - Responsive to torque or speed condition of drive


Subclass of Class 173 - Tool driving or impacting
Definition: Apparatus in which the sensing means senses a condition
No. of patents: 20
Last issue date: 07/19/2011


NumberTitleIssue Date
7980320Electric power tool with gear reduction unit
An electric power tool includes a motor, a reduction mechanism, a driving unit, a bearing unit, a housing, a speed changing unit, a power switch, and an operation detecting unit which detects a reduction ratio changing operation performed by the speed changing unit ...
07/19/2011
7372228Electric 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
7350286Rotational and axial power transmitting apparatus
Threaded member assembling can be performed using a rotational/axial-movement-transmitting unit including an upper frame; a motor held by the upper frame; a female threaded member secured to the upper frame; a male threaded member assembled in the female threaded me...
04/01/2008
7316394Sheet feeder having a drive for the synchronized feeding of sheets to a sheet-processing machine
In a sheet feeder for a sheet processing machine, such as a sheet-fed rotary printing press, and initial torque spike when the sheet feeder is first switched into the system is reduced with a switch-on torque limiter. The torque limiter is disposed in the drive trai...
01/08/2008
7088066Automatic output power limiting electrical device
An eletrical device derives power from an incoming power source to produce output plower to drive the device. The device includes circuitry that determines at lehst one characteristic of the incoming power source, and adjusts the output power used to drive the devic...
08/08/2006
6836614Electrical power tool having a motor control circuit for providing control over the torque output of the power tool
A power tool such as an electric drill typically contains a gear train that couples the output spindle of the motor to the tool bit-receiving chuck. The control circuit for the power tool is operable in a ratcheting or pulse mode that causes the output spindle to ro...
12/28/2004
6782594Method 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
6763573Assembly 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
6741051Power tool trigger control
A trigger controller for an electric power tool including a motor and a pull-trigger movable along a path having a foremost home position comprises a mechanical switch and a solid-state switch connected in series to the motor, wherein the mechanical switch includes ...
05/25/2004
6725948Method of regulating the feed force of a drilling device
In a method of regulating the feed force of a drilling device having a hydrostatic bore hole motor at the end of a linkage provided with a rotary and a feed drive, the feed of the linkage is set as a function of the pressure of the drive fluid for the bore hole moto...
04/27/2004
6668212Method for improving torque accuracy of a discrete energy tool
A method for improving the accuracy and repeatability of torque applied by discrete energy tools subjected to a wide variety of joint conditions. The method includes relating air pressure to output torque and compensating for temperature and aging variati...
12/23/2003
5848655Oscillating 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
5845718Resonant 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
5637968Power tool with automatic downshift feature
A method and apparatus for correcting torque overshoot in power tools wherein torque per angle rate is sensed on each rundown and the speed of the tool is automatically adjusted to maintain torque accuracy on higher torque rate joints while maintaining sp...
06/10/1997
5285857Nut 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
5094301Programmable pulsed torque recovery system
A method and apparatus for recovering torque lost due to joint relaxation in threaded fastener assemblies or joints. The present invention is especially adapted for use with medium-to-short or gasketed joints. In the practice of an exemplary embodiment of...
03/10/1992
4709182Method and apparatus for tightening or loosening screw-type connections
A method and apparatus for tightening or loosening screw-type connections, in which the screw bolt is stimulated to oscillate longitudinally, the natural frequency of the bolt is measured and the excitation frequency is made to follow the changing natural...
11/24/1987
4614462Rotation device for a foundation pile
A rotation device for settling a pre-molded foundation pile into the earth by imparting axial loading thereto and by imparting torque of approximately equal magnitudes to both the upper- and lowermost portions of the foundation pile. A clutch assembly com...
09/30/1986
4153119Directional drilling apparatus
A device for facilitating directional drilling of small diameter holes radially of a mine long hole comprising a segmented sleeve for movement through a guide channel in a main drill unit. A small bit is driven by a flexible shaft which passes through the...
05/08/1979
4144953Rotary drive disc brake for drawworks
A disc-type brake apparatus adapted for installation in combination with the drawworks of a well bore drilling operation for automatically sensing any reverse torque situation in the drill pipe and quickly set the brake for precluding transmission of any ...
03/20/1979
 
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