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| Number | Title | Issue Date |
| 7503401 | Solenoid positioning methodology A method for calibrating a power tool having a roller, a driver and a solenoid. The solenoid has a body and a rod and is coupled to the roller so as to be capable of selectively advancing the roller toward the driver. The method includes: locating the roller onto a ... | 03/17/2009 |
| 7438138 | Impact adapter for transfer of impacts and rotation from an impact rock drilling machine to a drill string Impact adapter for transfer of impacts and rotation from an impact rock drilling machine to a drill string comprising a first end (5) for connection to a drill string and a second end provided with ridges (7) and interposed grooves (8) for trans... | 10/21/2008 |
| 7269099 | Air gun A seismic air gun includes an operating chamber, a firing chamber, a port, and a longitudinally disposed cavity sized and shaped to accept a plurality of wires. A moveable shuttle includes a shuttle flange within the operating chamber at one end and a firing shuttle... | 09/11/2007 |
| 7237625 | Device for simulataneously casing a hole while drilling A driving device for installing a pipe or casing, without the use of hydraulic or pneumatic means, by capturing the rotational motion of the drill string. The driving device is placed at the top end of the pipe being (42) installed and the drill string (2 | 07/03/2007 |
| 7156189 | Self mountable and extractable ultrasonic/sonic anchor Self drilling anchors and related methods and apparatus. In one embodiment an apparatus comprises a drill bit, a hammer mechanism for hammering the drill bit in a first direction and in a second direction, and a selection mechanism for controlling whether, at a give... | 01/02/2007 |
| 7152699 | Connection rod and method for production thereof A connection rod (1) for rock drilling includes a first rod part (2) whidh has an external thread (4) provided at one end thereof, wherein the end of the rod opposite to the one end includes an end portion (6) which carries an internal th... | 12/26/2006 |
| 7125053 | Pre-expanded connector for expandable downhole tubulars A method and apparatus for providing an expandable threaded connection between segments of expandable tubulars. Threaded connections are machined into pre-expanded ends of tubulars. Once the threaded connections are machined into the pre-expanded ends, two joints of... | 10/24/2006 |
| 7121357 | Method of inserting a grounding rod A method of inserting a grounding rod includes providing an elongated grounding rod that has an upper end and a lower end and also providing a hammer drill. An elongated tubular member has an open first end and an open second end. The tubular member includes a first... | 10/17/2006 |
| 7117955 | Driver cap The driver cap assembly of this invention includes a tubular body and a driver sleeve that may be positioned over and/or about an end of a shafted body. A force is applied to the driver cap such that the other end of the shafted body is driven into a surface. The dr... | 10/10/2006 |
| 7111691 | Breaking hammer, and fastening element, side plate, and protective casing of breaking hammer A crushing hammer, and a fastening element, side plate, and protective casing for the crushing hammer. The crushing hammer comprises at least two alternative fastening elements with which it can be fastened to a boom of a work machine. The fastening can be done with... | 09/26/2006 |
| 7104731 | Divisible pile sleeve A pile driving device for driving in piles, with an axially-guided impact body movable in a hammer housing, an impact hood and a pile sleeve. So that the pile driving device can be transported by land without requiring surveys and preparation, the pile sleeve compri... | 09/12/2006 |
| 7040416 | T-post hole-forming device and use for installing a T-post The invention provides a T-post hole-forming device, comprising (a) a shaft; (b) a head for receiving a driving force at the top of said shaft; (c) a flat plate affixed to one side of said shaft, the shaft terminating in a pointed end for piercing the ground. Also p... | 05/09/2006 |
| 7028786 | Hand machine tool A hand power tool has a housing (10), a hammer barrel (12), a tool receptacle (14) that is separated from the hammer barrel (12) at least one locking body (16) for fixing the tool receptacle (14) in a direction of rotation (... | 04/18/2006 |
| 6968989 | Manually operable device for driving nails A manually operable device for driving nails into material includes a barrel having a bore into which nails can be placed or dropped and the barrel capable of reaching difficult, narrow, tight spaces that are unreachable by a hammer. Disposed within the bore is a dr... | 11/29/2005 |
| 6959760 | Downhole pulser A power generator for use in a wellbore formed in an earth formation, including an internal combustion engine having a cylinder and a piston defining a combustion chamber in the cylinder, the engine being arranged to induce a reciprocating movement to the piston rel... | 11/01/2005 |
| 6926089 | Downhole actuation system utilizing electroactive fluids Downhole wellbore tools are actuated by electrically controllable fluids energized by a magnetic field, for example. When energized, the viscosity state of the fluid may be increased by a degree depending on the fluid formulation. Reduction of the controllable fluid... | 08/09/2005 |
| 6854530 | Method for driving electric percussion tool A method for driving an electric percussion tool which includes a solenoid, a plunger core partially engaged in one end of the solenoid, and a spring disposed out of the solenoid and closer to the other end of the solenoid and distal to the plunger core. The solenoi... | 02/15/2005 |
| 6702037 | Post pounder having lateral impact resistant floating anvil A pile and/or post pounder utilizing a tracked floating anvil and having a continuous loop for lifting a tracked hammer. The pounder is adapted to be transported on, and powered by the hydraulic system on any mobile construction equipment. It safely holds... | 03/09/2004 |
| 6564882 | Electromagnetic hammer having a moving ferromagnetic mass The invention relates to an electromagnetic hammer having a moving ferromagnetic mass, the hammer being of the type comprising a tube of non-magnetic material for standing on an element that is to be driven into the ground, said tube being surrounded by a... | 05/20/2003 |
| 6523622 | Pneumatic percussion power tool with pneumatic returning spring A pneumatic percussion power tool has a percussion tool housing in which a drive piston and a percussion piston are movable in an axial direction. The motion of the drive piston, which is generated by a crank mechanism, is transmitted to the percussion pi... | 02/25/2003 |
| 6364577 | Pile driving transition piece A pile driving transition piece. The transition piece avoids the shock loading in the stabbing points of pile driving transition pieces that otherwise would be induced when the pile driving hammer strikes the transition piece. Avoiding the shock loading p... | 04/02/2002 |
| 6298923 | Impacting device for releasing blocked objects by impact An impacting device is capable of being used in an impact hammer and/or a drill for releasing by impact tools blocked in rocks. An impact impetus supplied by an impact piston is modified via an impact-deflecting device having a sliding lever and a deflect... | 10/09/2001 |
| 6135214 | Impact absorbing fluid operated hammer An impact hammer having a non-mechanical connection between the driving piston rod and the impact ram. The non-mechanical connection includes an annular body portion connected to the lower end of the piston rod which is received in a cavity in the top sur... | 10/24/2000 |
| 6095394 | Pneumatic hammer A pneumatic hammer includes a cap connected to a base member with tubular member received in an interior between the cap and the base member. A piston is reciprocatingly received in the tubular member and a piston rod extends from the piston. A spring mem... | 08/01/2000 |
| 5975221 | Machine for horizontal percussion boring In a machine for horizontal or inclined percussion boring in the ground having a percussion boring string which has an oblique-face boring head at one end and an impact mechanism at the other end, the impact mechanism is mounted beside the rotary drive in... | 11/02/1999 |
| 5752571 | Apparatus for generating impacts An apparatus for generating impacts which has a hydraulic cylinder and a reciprocating piston. The hydraulic cylinder has an impact chamber, a cavity which receives and diverts fluid, and a throat which connects the impact chamber with the cavity. When th... | 05/19/1998 |
| 5207280 | Device in hammer machines Device in hammer machines. The device comprises a machine housing (1) and a hammer piston (2) movable to-and-fro in the machine housing. A drilling tool connected to the machine housing comprises a drill bit (5), a set of tubes (4) for rotating the drill ... | 05/04/1993 |
| 5117924 | Energy transfer unit for a pile driver An energy transfer unit is designed for use in conjunction with a pile driving that has an impact block projecting from the lower end of the hammer casing and axially movable therein for transmitting energy from the hammer to a pile to drive the pile. The... | 06/02/1992 |
| 5025868 | Pneumatic ground piercing tool The present invention provides a self-propelled impact boring tool which, according to one aspect of the invention, has a simplified tail assembly so that the tool can be readily assembled and dissambled to allow replacement of worn parts. Such a tail ass... | 06/25/1991 |
| 4993504 | Device for efficient energy transfer and damping of impact drilling machines Device in impact machines. The device comprises a first chamber (5) which is connected to an accumlator (6) and the pressure of which is used to hold together a set of rods (2) forming part of the drill tool. Furthermore there is a second chamber (7) to d... | 02/19/1991 |
| 4932985 | Rapper construction A rapper for use in vibrating parts of an electrostatic precipitator by utilizing an impact force. An anvil is connected to a part of an electrostatic precipitator, such as, a section of electrodes either discharge electrodes or collecting plates or elect... | 06/12/1990 |
| 4903785 | Drilling and chiseling tool bit A drilling and chiseling tool bit includes a tool bit head, an axially extending shank and an insertion end for insertion into a drilling or chiseling device. The shank extends between the tool bit head and the insertion end and is divided into individual... | 02/27/1990 |
| 4648609 | Driver tool A torsion or hairpin spring external attachment for power hammers has eye ends respectively bottomed on the power hammer casing and on the tool driven by the hammer for maintaining the tool against the work and supporting a load on the power hammer while ... | 03/10/1987 |
| 4646852 | Pneumatic mallet A hand tool in the form of a pneumatically actuated mallet. The tool comprises a conventional pneumatic motor of the type employed in pneumatic fastener driving tools, including a tool body having a main cylinder, a piston/driver assembly, trigger-actuate... | 03/03/1987 |
| 4630687 | Percussion device A pneumatic hammer comprises a cylindrical housing, in which are a free piston, an anvil, and needles the rear ends of which end in heads designed to rest against the anvil and supported by a tool holder. The anvil comprises a steel cylinder in the latera... | 12/23/1986 |
| 4602689 | Power tool A power tool, particularly a hand-held power tool, has a striking mechanism with a striker transmitting impact energy to a tool, a drive operative for actuating the striker through an air cushion, and a heat insulating element which is associated with the... | 07/29/1986 |
| 4593768 | Hydraulically operated impact device In a hydraulic rock drill there is a hydraulic so called recoil damper that damps the reflected shock waves that propagates from the rock backwardly through the drill stem. The damper comprises a support piston (68) slidably in a cylinder so that a pressu... | 06/10/1986 |
| 4589501 | Offset driver accessory The invention comprises an accessory for use with a driver for forceably inserting friction rock stabilizers into bores formed in earth structures (such as mine roofs). In the depicted embodiments, the Accessory comprises an elongate body having a driver ... | 05/20/1986 |
| 4571112 | Joint assembly Oppositely facing surfaces have grooves in one of the surfaces and low coefficient of friction inserts in the grooves. The inserts have a thickness greater than the depth of the grooves so as to project from the grooves when seated therein for bearing aga... | 02/18/1986 |
| 4557630 | Vibratory clamping device for use with an excavator in supporting and placing sheeting when excavating in sand, running sand and silt A first portion of the device is suspended by a head from the mounting for an excavator bucket and comprises a first jaw and a guideway. A second portion of the device comprises a second jaw and a slide slidable within the guideway under the control of a ... | 12/10/1985 |
