Matches 151 - 200 out of 293 < 1 2 3 4 5 6 >
Match Document Document Title
5248002 Ground rod installation method  
The tool includes a handle having a bore opening at its lower end and a hammer head at its opposite end. A weight is removably secured to the hammer head and has an aperture in one end. In use, the...
5236052 Method and an apparatus for controlling stress in a member and a fastener having stress indicating means  
Proposed is a method and an apparatus for controlling stress applied to a fastener member or the like by a fastening tool by detecting an elastic wave generated in the member as the stress, for...
5215270 Method for tightening a fastener  
An improved and novel method for controlling the speed of a mechanical apparatus in relation to a reference parameter. The reference parameter can be torque, displacement or similarly measurable...
5213166 Pile driving and pile removing method  
A pile driving and pile removing method comprises the step of causing a water-in-oil type water swellable polymer particle emulsion to be present on the pile surface or in the vicinity thereof...
5174387 Method and apparatus for adapting the operational behavior of a percussion mechanism to the hardness of material that is being pounded by the percussion mechanism  
A control system for a hydraulic percussion mechanism (6) is based on the continuous measurement of the striking rate (z) of the striking piston, or on the continuous measurement of the striking...
5174388 Driver tool and method  
The present invention relates to a tool and method of using the same for pushing or pressing rods into the earth. A moveable pusher body is mounted on an elongated, slotted mast, and is provided...
5156221 Method of and arrangement for controlling the operation of a hand-held electrical device  
An electrical hand-held device, such as a screwdriver or the like, includes an output shaft, a drive motor for driving the same, an actuating coupling for connecting the output shaft with the drive...
5139092 Quick change torque multiplier adaptor  
A device for coupling a torque driver to a fastener that is to be driven on a workpiece by the driver, and for coupling the driver housing to the workpiece, has two nesting cylindrical barrels, one...
5131475 System for controlling drilling force of a telescoping rock drill  
A telescoping drill has a base, a guideway displaceable longitudinally forwardly and rearwardly on the base, a guideway actuator braced between the guideway and the base and energizable for...
5129464 System for controlling a rock drill  
A rock drill has a normally stationary base, a support movable longitudinally on the base forward toward and backward away from a rock face adjacent the base and having a part engageable forwardly...
5121802 Method and arrangement for controlling a rock drilling apparatus  
The invention relates to a method and an arrangement for adjusting the percussion and the feed of a rock drilling apparatus with respect to each other. In the method, the volume flow of pressure...
5117919 Torque control system and method  
An air tool torque control system includes a controller operative to independently control two air tools with continuous programmed adjustment of the torque shut off point for each tool after each...
5107933 Hydraulic drilling outfit  
A hydraulic drilling outfit has a hydraulically driven hammer drill which is fastened pivotally to a hydraulic thrust unit. A control for the hydraulics utilizes the flushing water for the drill...
5105519 Tension control method for nutrunner  
A tension contol method for a nutrunner performed by the use of a nutrunner and a controller associated with each other. In accordance with the present invention, the fastening torque T f of the...
5094301 Programmable 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...
5090485 Pile driving using a hydraulic actuator  
A system is described for efficiently driving a pipe or pile into the ground. The resonant frequencies of the pile are determined, and a hydraulic actuator is controlled to apply a series of...
5088564 Method of and apparatus for driving piles  
A pile driver is disclosed, in which an adapter for transmitting the hammering force of a hammer provided in a hydraulically driven vibrator to a member to be driven into the ground is provided...
5086848 Reversible impact hole driller and method of reversing  
An improved reversing mechanism in an impact hole drilling tool having a tubular body with a forward ground piercing end and a rearward pneumatic supply end. The reversing mechanism includes a slot...
5062491 Apparatus for controlling nut runner  
The output shaft of a nut runner for tightening a fastener such as a bolt is first rotated with a first torque at a first speed. When the tightening torque of the output shaft reaches a preset...
5020605 Post driver and methodology  
A post driver includes a sleeve for supporting a post as the post is driven into the ground and a driver for driving the post into the ground while the post is supported by the sleeve. The sleeve...
4993500 Automatic drive hammer system and method for use thereof  
An automatic drive hammer system includes an automatic drive hammer apparatus which is carried by a bucket pivotally mounted to a drill rig. The drive hammer apparatus may be pivoted in the bucket...
4989677 Pile driving  
A pile 13 is driven into the ground 5 by a ram 8 driven by a hydraulic cylinder 37. The pile 13 is guided through a guide 2 having a detachable end portion 4 which is embedded in the ground. The...
4979574 Punch tool apparatus and method  
A punch tool for applying force to a work piece includes a body, a grip mounted on one end of the body, a punch connected to the other end of the body, and an anvil pivotally connected to the body...
4979575 Method of drilling a hole-in a rock  
A method and an arrangement for drilling a hole in a rock (6), wherein a preliminary hole is drilled first, whereafter the drilling is interrupted. Joints between a drill boom (2) and a feeding...
4971158 Method in rotary drilling and rotary drilling apparatus  
In a rotary drilling apparatus, a rotary head is advanced against an object to be drilled and a neck element included in the rotary head and connected with drilling member is rotated around its...
4964473 Method for driving a hydraulic submerged tool  
Method for driving a hydraulic submerged tool whereby the hydraulic pressure energy is generated in a submerged power converter, being driven by pressurized surrounding water which after the energy...
4958689 Method of providing a high pressure surge of working fluid to an underground percussive mole  
A manually operated downhole for an underground earth boring apparatus having a pneumatically operated earth boring tool. A drill pipe is connected to the tool and to a source of pneumatic fluid. A...
4889191 Gooseneck assembly for rock drill and method for inserting friction rock stabilizer  
A gooseneck interposed between a rock drill and supporting jack leg includes an offset pivot bearing for the rock drill and an adjacent pin to facilitate initial insertion of a friction rock...
4858312 Torque control for automatic connector assembly tool  
This invention relates to a method of controlling torque in an electric motor driven connector applicator which applies a desired torque to a twist-on wire connector and a plurality of wire ends...
4850436 Attached pulverulent and granular material shake-down apparatus  
An attached pulverulent and granular material shake down apparatus which comprises a main body of a shock application device operable by a three-way valve and a high pressure air generation device...
4832133 Tightening system and a method of tightening  
A method of tightening and a tightening system using the method. The method includes the steps of providing pulse with modulated waveforms from an inverter, driving an AC induction motor by the...
4818149 Method of and a drive unit for driving ramming parts under water  
For driving of ramming parts under water, a first ramming device is suspended on the supporting element and a second ramming device is suspended on a further supporting element, a submergible...
4809787 Method and apparatus for removing accumulated ice from pavement  
An ice breaking attachment for impact hammers. The main component is a rigid metal beam used to transfer the blows of the impact hammer to the ice surface and then when the beam breaks through the...
4802538 Piling hammer  
A hammer for driving a pile into the ground has a cylindrical barrel and an anvil sealed to an end of the barrel, a hammer piston mounted for reciprocation within the barrel towards and away from...
4778014 Ventilating means  
This invention is a machine for ventilating roof decks which, without such ventilation, entraps moisture which leads to reduced insulating capacity, deterioration and the like. This ventilating...
4763980 Method and apparatus for centering the core of a light guide fiber in a light guide end portion  
The eccentricity of the core of the light guide fiber relative to the outer casing of the light guide end portion is detected by viewing the end face while simultaneously rotating the light guide...
4747455 High impact device and method  
A high impact device, as for producing an impact of 1,000 foot pounds or more, includes a ram which is engageable by a pair of rotating flywheels. The ram may impact a tool, as of a chisel type...
4723610 Percussion device  
The percussion mechanism of this device, comprising a cylinder, a free piston, an anvil, a tool holder in which a bundle of needles is disposed, the heads of which are applied to the anvil, is...
4653593 Control method and control device for a down-the-hole rock drill  
When drilling deep boreholes with a down-the-hole drill (15), the pressure and the flow of the motive fluid are controlled so that the impact velocity of the piston hammer of the drill is kept...
4553610 Hydraulic striking machine  
Improvement to a hydraulic striking machine including among other things a body part and a piston, moving to and fro in the body and being accelerated to strike against a tool. The air current...
4542794 Method and a means for aligning a rock drill  
The alignment of the drill stem and bit of a rock drill rig is corrected when the force of drilling and the feeding power on the drilling machine of the rig has resulted in a change in the...
4537263 Method and means for adjusting the feed support of a rock drilling unit into a given distance from the drilling location  
The feed support of a rock drilling unit is adjusted to be a given distance from a rock surface wherein holes are to be drilled. A drill bit is moved into abutment with the rock surface. The feed...
4534420 Electric tool with torque monitor  
An electric tool, especially a hand tool, is provided with a torque monitor. For this purpose the support bearings taking up the reaction torque of the electric motor in the housing of the tool are...
4534419 Method for pile driving and dragging  
A method and apparatus for guiding a body into the ground by means of a single hammer acted on by a reaction mass which is driven by a double-acting piston-cylinder unit via a controlled,...
4522269 Dual motor torque delivering tool  
A pneumatic power tool for tightening screw joints includes a primary motor 11 for a high speed running down sequence, a secondary motor 12 for a high torque final tightening sequence, a coupling...
4498544 Method for rock drilling  
A rock drilling machine is swingably carried on a pivotable drill boom. The rock drilling machine is fed along a drilling axis in response to a feeding movement applied by the drill boom. A set...
4497376 Interchangeable ram diesel pile  
A diesel-engine pile driving hammer provided with interchangeable rams for use in a single, outer, cylindrical casing. A large diameter hole or orifice is provided in the casing between a pair of...
4494612 Manually operable post driver  
A manually operable post driver for posts (10) including a slide hammer (11) and removable anvil (12) mounted on the post for accomplishing the driving is described. The anvil (12) is rigidly...
4473123 Diesel hammer capable of delivering uplift blows and method of using same  
A diesel hammer (20) is adapted to produce uplift blows by connecting its casing (30) via a pulling connection (52) to a case (24) to be pulled, removing vent plugs (76) from the top of the casing,...
4465145 Cushioned drive cap for a pile driver  
A force-transmitting a drive caps is interposable between a pile driver hammer and a pile to be driven. This cap is formed with an upwardly open cylinder which is of smaller area than the striking...
Matches 151 - 200 out of 293 < 1 2 3 4 5 6 >