Selective Axial Direction Of Impact Patents (Class 173/91)
  • Patent number: 10641053
    Abstract: A modular force multiplier converts a push-down force applied to a work string from the surface into a multiplied linear force that can be used to operate downhole tools to perform tasks requiring the application of linear force.
    Type: Grant
    Filed: June 11, 2018
    Date of Patent: May 5, 2020
    Inventors: Joze John Hrupp, Lloyd Murray Dallas
  • Patent number: 10487586
    Abstract: A directional boring system includes a hammerhead mole that is fluidly coupled to a power source. The hammerhead mole selectively bores underground in a selected direction. A steering unit is movably coupled to the hammerhead mole and the steering unit frictionally engages the ground at a selected angle. In this way the hammerhead mole is steered in the selected angle. A remote control is provided and the remote control is in wireless electrical communication with the steering unit. In this way the remote control controls movement of the hammerhead mole.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: November 26, 2019
    Inventor: Kelley Roberts
  • Patent number: 10480246
    Abstract: A percussion boring device with an impact piston is mounted within a housing and driven in a cyclic back and forth movement. In a first switch position, the impact piston strikes a front impact surface, in order to drive the percussion boring device in a first movement direction, and, in a second switch position, the impact piston strikes a rear impact surface, in order to drive the percussion boring device in a second movement direction. For the reversal of the movement directions, a guide tube fixed to the housing, and a control sleeve which can be axially shifted on the guide tube, are provided, and the impact piston can be axially shifted on the control sleeve. The control sleeve includes two sections which are connected to one another by a movable connection.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: November 19, 2019
    Assignee: TRACTO-TECHNIK GmbH & Co. KG
    Inventors: Franz-Josef Püttmann, Gerhard Völkel, Gerhard Balve
  • Patent number: 10245160
    Abstract: A system and method for allowing any surgeon, including those surgeons who perform a fewer number of a replacement procedure as compared to a more experienced surgeon who performs a greater number of procedures, to provide an improved likelihood of a favorable outcome approaching, if not exceeding, a likelihood of a favorable outcome as performed by a very experienced surgeon with the replacement procedure, including installation and orientation of a prosthesis into tissue of a patient as well as construction of a prosthetic assembly to be installed into such tissue.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: April 2, 2019
    Inventor: Kambiz Behzadi
  • Patent number: 10245162
    Abstract: A system and method for allowing any surgeon, including those surgeons who perform a fewer number of a replacement procedure as compared to a more experienced surgeon who performs a greater number of procedures, to provide an improved likelihood of a favorable outcome approaching, if not exceeding, a likelihood of a favorable outcome as performed by a very experienced surgeon with the replacement procedure.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: April 2, 2019
    Inventor: Kambiz Behzadi
  • Patent number: 9550286
    Abstract: An apparatus for removing a pin from a target location is described. The apparatus includes a rod; a clamp that includes multiple arms and attached to a one end of the rod; a sleeve coupled to the rod and adapted to enclose the clamp, where the arms of the clamp are pushed towards each other to engage with a pin in the enclosed position. The apparatus further includes a clip member to couple with the rod for removing the pin from the clamp by disengaging the clamp from the sleeve. The clip member includes a first arm coupled to a second arm via a pivot member, the clip member being adapted to couple to the rod between the sleeve and a hammer. The hammer is coupled to the rod and adapted to strike a force on the clip member to disengage the clamp from the sleeve.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: January 24, 2017
    Assignee: Caterpillar Inc.
    Inventors: Bradley T. Bonds, Michael J. Gunn
  • Patent number: 9416514
    Abstract: The post driver with limited movement floating post anvil does not rely heavily upon the skill of the operator to efficiently drive posts. The post anvil is allowed to move up and down in relation to the driver, but its movement is limited by both lower and upper fixed barriers. Since the movement is limited, the operator can position the driver upon the post allowing the full weight of the driver framework/carrier machine to rest upon the post. The post would push the floating post anvil upward only to the point at which the upper fixed barrier prevents further upward movement of the floating post anvil. Thus, once the floating post anvil abuts the upper fixed barrier, substantially the entire weight of the post driver is resting on the post.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: August 16, 2016
    Assignee: DANUSER LLC
    Inventors: Gary J Niekamp, Tyler Van Lant
  • Patent number: 9067310
    Abstract: The invention relates to a sealing arrangement in a rotating control valve of a pressure fluid-operated percussion device, to which percussion device a tool is mountable movable in its longitudinal direction, the percussion device containing a work chamber and a transmission piston mounted movable to compress the tool suddenly to generate a stress pulse to the tool, inlet and outlet channels for conducting pressure fluid to the percussion device and away from it, and a control valve having a rotating switch member with channels to connect inlet and outlet channels through the channels of the switch member to alternately conduct the pressure fluid through the channels to the work chamber and, correspondingly, away from the work chamber, and in the inlet channel of the pressure fluid at the switch member side end thereof at least one sealing sleeve for the purpose of sealing the inlet channel to the switch member.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: June 30, 2015
    Assignee: Sandvik Mining and Construction Oy
    Inventors: Markku Keskiniva, Juha Piispanen, Mauri Esko
  • Patent number: 8955613
    Abstract: A ground piercing tool as according to the invention has a front head assembly mounted on a bit shaft. A mid-portion of the bit shaft is mounted between front and rear chambers. Compressed fluid is supplied to the front chamber to form a gas spring that prevents the bit shaft from impacting against a front stop when it receives a blow from the striker. A valve is provided that includes a passage that permits communication between the front chamber and the rear chamber when the bit shaft is in a forwardmost position wherein it contacts the front stop. The valve permits compressed air to pass from the front chamber to the rear chamber, negating the gas spring when the bit shaft is in the forwardmost position.
    Type: Grant
    Filed: May 1, 2009
    Date of Patent: February 17, 2015
    Assignee: Earth Tool Company, LLC
    Inventor: Mark D. Randa
  • Patent number: 8936076
    Abstract: A vibratory tool for use in a tubular string to prevent sticking or to release a stuck string features a fluid operated dart valve working in conjunction with an impact sleeve to deliver continuous axial jarring blows in opposed directions as long as flow is maintained. Movement of one of those components axially in opposed directions opens and closes access to opposed lateral ports so that a lateral vibration is also established as flow cyclically occurs and stops sequentially at opposed lateral outlets.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: January 20, 2015
    Assignee: Baker Hughes Incorporated
    Inventors: Richard Yingqing Xu, Steve Rosenblatt
  • Patent number: 8893827
    Abstract: A drilling apparatus including a hydraulically powered hammer having a piston to impact a drill bit; a shuttle valve to control reciprocation of the piston; and an accumulator for hydraulic fluid; at least one drill rod having a first connection valve for connection of the drill rod to the connection valve of the hammer; and a second connection valve for connection of the drill rod to the first connection valve of a like drill rod or to a rotation device. The piston and shuttle valve are positioned substantially in-line to the axis of movement of the hammer. The accumulator is positioned proximate to the shuttle valve; and the first connection valve, and second connection valve having at least one poppet valve positioned proximate to a corresponding valve seat.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: November 25, 2014
    Assignee: JFK Equipment Limited
    Inventor: John Kosovich
  • Patent number: 8887835
    Abstract: A drilling apparatus including a hydraulically powered hammer having a piston to impact a drill bit; a shuttle valve to control reciprocation of the piston; and an accumulator for hydraulic fluid; at least one drill rod having a first connection valve for connection of the drill rod to the connection valve of the hammer; and a second connection valve for connection of the drill rod to the first connection valve of a like drill rod or to a rotation device. The piston and shuttle valve are positioned substantially in-line to the axis of movement of the hammer. The accumulator is positioned proximate to the shuttle valve; and the first connection valve, and second connection valve having at least one poppet valve positioned proximate to a corresponding valve seat.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: November 18, 2014
    Assignee: JFK Equipment Limited
    Inventor: John Kosovich
  • Patent number: 8783378
    Abstract: An auto hammer includes a housing having a grip, a head assembly arranged on one end of the housing, a motor mounted within the housing, a switch arranged on the housing for controlling the motor. The head assembly includes a striking device having a receiving cavity which comprises a locking mechanism. When the receiving cavity is retracted into the housing and locked by pressing the locking pin downwardly, with the striking rod being revealed to increase the visibility of the striking rod. During operation, the objects to be processed, such as tenons and bricks, may be impacted by the striking rod in a linear reciprocating manner, so that the function of the tool can be expanded, without being limited to knocking the fastening pieces into the objects to be processed.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: July 22, 2014
    Assignee: Chervon Limited
    Inventor: Hongtao Zhou
  • Patent number: 8695458
    Abstract: A slide hammer may be provided. The slide hammer may include: a body defining a through hole and a first attaching surface; an auxiliary weight having a second attaching surface configured to attach to the body at the first attaching surface, the auxiliary weight having a through hole located to align with the through hole in the body when the auxiliary weight is attached to the body; and a shaft located in the through holes in the body and auxiliary weight. A method of constructing a slide hammer is provided.
    Type: Grant
    Filed: February 20, 2012
    Date of Patent: April 15, 2014
    Assignee: Bosch Automotive Service Solutions LLC
    Inventors: Robert Jensen, Robert Kochie, Michael White, Larry Betcher
  • Patent number: 8544566
    Abstract: A fluid-actuated percussive impact tool includes a drill bit disposed partially within a casing for respective longitudinal movement between extended and retracted positions. A bearing having a bore is fixedly disposed within the casing. A piston is located in the chamber and a second end thereof is configured to selectively enter the bore of the bearing through the first end to impact the first end of the drill bit. At least one groove is formed in an exterior surface of the piston proximate the second end thereof. The tool has a sealed position when the drill bit is in the extended position wherein a water seal is formed between an interior surface of the bearing and a portion of the exterior surface of the piston between the first end of the piston and the first end of the at least one groove.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: October 1, 2013
    Assignee: Eastern Drillers Manufacturing, Inc.
    Inventor: Michael Mulligan
  • Patent number: 8522892
    Abstract: An apparatus and method of manufacturing the same are disclosed for an impact device with interchangeable tools for applying precise momentum force to an external object. The device includes two elongated members, one of which containing a hollow portion, and a tool head disposed on one side of the first elongated member. The device can be configured to allow the first elongated member to be removably inserted into the second elongated member and to allow the second elongated member to strike the tool head in order to impart force on an external object.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: September 3, 2013
    Inventor: Normand Lemelin
  • Patent number: 8485274
    Abstract: It is an object of the invention to provide a technique that contributes to rationalization of a mechanism relating to reduction of vibration in an impact tool. Representative impact tool includes a tool body, a hammer actuating member, a dynamic vibration reducer and a positioning elastic element. The positioning elastic element contacts the hammer actuating member and thereby positions the tool body with respect to the workpiece so as to absorb a reaction force caused by rebound from the workpiece and acts on the hammer actuating member when the hammer actuating member performs the hammering operation on the workpiece. The positioning elastic element includes the elastic element formed as a component part of the dynamic vibration reducer.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: July 16, 2013
    Assignee: Makita Corporation
    Inventors: Hiroki Ikuta, Hikaru Kamegai
  • Patent number: 8453727
    Abstract: A jarring device includes an outer housing which defines an axial flow path therethrough. An impact rotator is retained within the housing and is rotatable therewithin between a first rotational position and a second rotational position to create a jarring impact. A torsional spring biases the impact rotator toward the first rotational position. Fluid flow through the housing rotates the impact rotator from the first to the second rotational position.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: June 4, 2013
    Assignee: Baker Hughes Incorporated
    Inventor: Richard Yingqing Xu
  • Publication number: 20130075120
    Abstract: Impact tool and method for a hammer device that includes impact tool housing and tubular piston structured and arranged for axial displacement in impact tool housing via pressure medium. Tubular piston has essentially radial pressure surfaces structured and arranged on opposite portions of tubular piston to be acted on with pressure medium. Grooves are formed in impact tool housing that are structured and arranged for a reversal of a direction of a pressure medium impingement on pressure surfaces and discharge or recirculation of medium. Grooves include a control recess formed in tubular piston and at least two control grooves for a shift of pressure medium impingement on pressure surfaces that are arranged axially offset in impact tool housing. A controller is structured and arranged to alternatively activate one of the at least two control grooves via connection channels.
    Type: Application
    Filed: September 26, 2012
    Publication date: March 28, 2013
    Inventor: TMT-BBG Research and Development GmbH
  • Patent number: 8387487
    Abstract: A tactical entry tool for creating an entry point through a building structure is provided. The tool includes a shaft portion including a shaft, and a head portion attached to a first end of the shaft. The head portion includes two heads, with each head including a head shaft extending from the shaft to form a ‘Y’ shaped structure and a break head portion attached to the head shaft at an opposite end from which the head shaft is connected to the shaft. Each break head portion includes a plurality of teeth surrounding the perimeter of the break head portion and a plurality of breaker tips extending from the break head portion.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: March 5, 2013
    Assignee: J&N Tactical, LLC
    Inventors: Jeffrey Herr, Matt Herr
  • Patent number: 8360167
    Abstract: A hydraulic hammer (14) may include a housing (30) having a distal end defining an opening (38), a bushing (54) positioned adjacent the housing distal end, the bushing (54) having an inner guide surface (58) and a distal end (56), and a tool (22) having a proximal section (60) slidably disposed in the bushing inner guide surface (58) and a distal section (62) projecting from the housing (30) through the opening (38). The hydraulic hammer (14) may further include a composite seal (70) having an exterior cover (72) with a proximal end (76) releasably coupled to the bushing (54) and a distal end (77) projecting from the distal end (56) of the bushing (54), the exterior cover distal end (77) defining a recess (90) opening toward the tool (22), and an interior seal (74) having a base (92) disposed in the exterior cover recess (90) and a sealing arm (94) projecting inwardly from the base (92), the sealing arm (94) being configured to sealingly engage the tool (22).
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: January 29, 2013
    Assignee: Caterpillar Inc.
    Inventors: Rakesh Dushyantrao Jagdale, Lauritz Phillip Pillers, II
  • Publication number: 20120325510
    Abstract: An impact wrench with an improved redirection switch includes a housing, a motor shell, an on/off bar set, and a redirection switch. The pushing bar of the redirection switch and the redirection valve are connected in tandem along the same horizontal line. The rotational axis of the rotating redirection valve is perpendicular to the penetrating axis of the on/off bar set, instead of the same penetrating axis line. Therefore, the invention achieves the redirection effect without increasing the volume of its handle.
    Type: Application
    Filed: June 21, 2011
    Publication date: December 27, 2012
  • Patent number: 8292003
    Abstract: A handheld tool with a pneumatically operated linear oscillating drive is provided. The handheld tool has a motor housing and a piston movable in the motor housing, which separates the two working chambers of the motor housing from one another. A piston crown faces toward one chamber of the two working chambers, with a compressed air supply line toward the motor housing and a slide valve, which controls an alternating supply of compressed air to one and the other of the two working chambers, and with an exhaust air opening in the motor housing. The handheld power tool is distinguished in that the piston additionally has a piston skirt facing toward the other chamber of the two working chambers.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: October 23, 2012
    Assignee: Biax Machinen GmbH
    Inventor: Marco Baumann
  • Patent number: 8276683
    Abstract: A post driver for driving hollow posts, especially plastic posts, has an elongated central guide shaft and a hollow outer sleeve. The guide shaft has a length and diameter sized to pass fairly freely through but generally fill the post's hollow core to protect against the post buckling during pounding strokes. The outer sleeve annularly surrounds a substantial upper portion of the post for similar reasons. The outer sleeve transmits pounding strikes to a stop formation that rests stationary on the post's top end. That way, a user manually applying pounding strokes to the stop formation's upper surface transmits force to not only the post's top end but also the guide shaft's bottom end. Optionally, the guide shaft's bottom end is tipped and sticks out a little in order to pierce a pilot hole in the ground, and clear a path, for the post to follow.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: October 2, 2012
    Inventor: Christopher H. W. Roy
  • Patent number: 8230940
    Abstract: A method and pile-driving device for driving a support into a ground surface. The device comprises a cylinder, an anvil which closes the lower side of the cylinder at least substantially, a ram which is movable as a piston above the anvil within the cylinder, and an injection device for injecting fuel into a combustion chamber between the anvil and the ram. The device has adjusting means for adjusting the moment of fuel injection and/or the amount of fuel to be injected. The method includes: causing the ram to move downward; injecting fuel into the combustion chamber; causing the fuel to combust for driving the ram upward, in such a manner that said combustion occurs before the ram strikes the anvil, wherein the moment of fuel injection and/or the amount of fuel to be injected is/are adjusted in dependence on at least one variable.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: July 31, 2012
    Assignee: Technische Universiteit Eindhoven
    Inventor: Jasper Stefan Winkes
  • Patent number: 8181714
    Abstract: A reversible, pneumatic ground piercing tool has a tail assembly with exhaust passages therethrough. At least a portion of each exhaust passage angles radially inwardly and ends in discharge ports that communicate with a central hole at the rear end of the tail assembly, whereby exhaust escapes through the central hole. A tail cone has a radially inwardly extending flange on the inner periphery of the central hole, which flange is rearwardly spaced from and covers the discharge ports.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: May 22, 2012
    Assignee: Earth Tool Company, LLC
    Inventor: Mark D. Randa
  • Patent number: 8122793
    Abstract: A tool for aligning a wind turbine tower fastener includes a shaft having a first end and a second end. A first stop is disposed on the shaft proximate a first end of the shaft and a second stop is disposed on the shaft between the first end and the second end. The tool also includes a ram reciprocally movable about the shaft between the first stop and the second stop for applying a force to the first stop and the second stop respectively. The tool further includes a fastener engaging structure disposed proximate the second end for engaging at least a portion of a fastener and transferring the force applied by the ram to at least one of the first stop and the second stop effective to urge movement of the fastener responsive to the force for aiding alignment of the fastener.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: February 28, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventor: Wayne S. Campbell, Jr.
  • Patent number: 8096368
    Abstract: A hand-driven receiving bracket for galvanized or steel pipe used with yard fences, gateposts, pet pens, and the like comprises a round galvanized pipe and three (3) downwardly directed triangular steel plates. The bracket is then driven into the ground such that the top of the pipe is flush with the ground surface. After driving, the receiver bracket is ready for fence posts, gateposts, and other ground style devices. A plate device that sits atop the bracket and can be driven with a large sledgehammer provides a large flat surface that is suitable for impact and spreads such impact over the entire bracket, thus preventing damage. Alternately, a sliding hammer that slides upon a tall steel pipe which connects to the top of the bracket is used to drive the bracket into the ground and comprises a twist lock mechanism that engages the bracket and spreads the impact to prevent damage. When driven flush, it also is removed and replaced with a permanent fence or gateposts.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: January 17, 2012
    Inventor: Stephen B. Rider
  • Patent number: 8006776
    Abstract: A pneumatic device control apparatus and method comprising a ported valve slidably fitted over a feed tube of the pneumatic device, and using a compliant biasing device to constrain motion of the valve to provide asymmetric timing for extended pressurization of a power chamber and reduced pressurization of a return chamber of the pneumatic device. The pneumatic device can be a pneumatic hammer drill.
    Type: Grant
    Filed: February 3, 2009
    Date of Patent: August 30, 2011
    Assignee: Sandia Corporation
    Inventor: Yarom Polsky
  • Patent number: 7992652
    Abstract: A fluid distributor cylinder is for a percussive drill assembly that includes a casing having an inner circumferential surface defining a central bore, a central axis extending through the bore, a bit movably coupled with the casing and a piston movably disposed within the casing bore. The distributor cylinder includes a generally tubular body disposeable within the casing bore and having first and second ends, a central axis extending generally between the first and second ends, an outer circumferential surface. At least a section of the outer surface is configured to engage with the inner surface of the casing so to form an interference fit between the body and the casing. The cylinder includes an exterior thread and/or a radially-extending shoulder configured to releasably engage with the casing inner surface so as to substantially prevent axial displacement of the distributor body with respect to the casing.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: August 9, 2011
    Assignee: Atlas Copco Secoroc LLC
    Inventor: Timothy J. Plunkett
  • Patent number: 7980322
    Abstract: An impact adaptor to convert a rock drill to an impact driver is described. The impact adapter has a boom coupling for securing the adapter in co-operating alignment with the shank of a drifter. The adapter has a casing for slidingly receiving and guiding an anvil therein from a top open end of the casing. The casing has an open bottom end adapted for receiving a top end section of a pile, tube or rod in the casing. Anvil supports are provided in the casing for retaining the anvil captive therein in the absence of the top end section of the pile, tube or rod. The casing has a predetermined length above the anvil supports to permit captive displacement of the anvil and displacement of the top section of the pile, tube or rod therein. The impact adapter is secured to the drifter in a movable or immovable manner and compensates for wear of the shank.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: July 19, 2011
    Inventor: Alain Desmeules
  • Patent number: 7950470
    Abstract: A mechanical fence post driver for attachment to a lift arm of a standard front-loader which includes a mounting plate, guide tube, and roller latch assembly. The guide tube receives a tee or other fence post inserted therein such that it contacts the mounting plate. The fence post is held in place by a roller latch assembly which compresses the post against the rearward side of the guide tube. Insertion of the fence post into the ground is accomplished by lowering the lift arm while the post is held within the guide cylinder. A rotation plate assembly may be positioned between the mounting plate and guide cylinder to provide a convenient mechanism to rotate the guide cylinder in relation to the mounting plate.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: May 31, 2011
    Inventor: Jimmy Glenn Reid
  • Patent number: 7934567
    Abstract: A driving apparatus is disclosed for planting a vertically oriented shaft into a granular base. The driving apparatus includes an anvil integrally formed at an intermediate location on the shaft. A weight is attached on the shaft, above the anvil, in freely slidable engagement. The shaft is provided with a tapered lower end. With the lower end positioned adjacent to the granular base, the weights may be repeatedly propelled against the anvil, by sliding along the shaft in a hammering motion, to drive the shaft into the base. The shaft may serve to support an article such as a beach umbrella.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: May 3, 2011
    Inventor: John Madey
  • Patent number: 7921933
    Abstract: In a driving tool, a diameter of an intermediate member is enlarged to increase a mass of the intermediate member and an outside diameter of a cylinder at a position where the intermediate member is internally provided is enlarged in accordance with the enlarged diameter of the intermediate member. Further, in the driving tool, a bearing thickness of a ball bearing is reduced correspondingly to a dimension of the enlarged outside diameter of the cylinder and a washer is provided at a part where the ball bearing abuts on the cylinder in the forward and backward moving direction thereof.
    Type: Grant
    Filed: May 21, 2009
    Date of Patent: April 12, 2011
    Assignee: Max Co., Ltd.
    Inventors: Terufumi Hamano, Akira Teranishi, Kazuya Sakamaki
  • Patent number: 7914233
    Abstract: A method for installing an underground pipe using a ground piercing tool comprises the steps of: fitting an expander onto a front nose of the tool, securing the pipe to the expander so that the ground piercing tool is disposed inside of the pipe, operating the tool in forward mode over a run to pull the pipe into the ground, removing the ground piercing tool from the expander and pipe by moving it in a rearward direction through the newly installed pipe, and leaving the expander in the ground, preferably to form the front end of the newly installed pipe. It is not required that each of the foregoing steps be conducted in the order recited. For example, the expander could be secured to the pipe after which the expander and pipe could be fitted over the tool.
    Type: Grant
    Filed: March 10, 2006
    Date of Patent: March 29, 2011
    Assignee: Harr Technologies LLC
    Inventor: Robert E. Crane
  • Patent number: 7891437
    Abstract: The invention relates to a method for breaking rock to be drilled in rock drilling, in which method the rock to be drilled is subjected to successive stress pulses via a tool. The method comprises stress pulses being exerted on the rock at a high frequency, and the load proportion calculated on the basis of the values of the frequency and the length (tp) of the stress wave being at least 0.075.
    Type: Grant
    Filed: September 23, 2005
    Date of Patent: February 22, 2011
    Assignee: Sandvik Mining & Construction OY
    Inventors: Markku Keskiniva, Jorma Mäki, Erkki Ahola, Mauri Esko, Aimo Helin
  • Patent number: 7874382
    Abstract: A pneumatically reversible ram boring device includes a percussion piston (8) that is situated in a casing (1) and is movable back and forth by operation air supplied via an operational-air supply via an operational-air line (5), a control pipe (4, 36, 54) having at least one control opening (13), an outer pipe (15, 65), and a control sleeve (10, 60) that can be displaced by compressed air from a control chamber (16, 66). An essentially torsion-resistant operational-air line (5) can be rotatably connected to a rotary valve (4, 40, 70) that supplies the control chamber with operational air or vents air from the chamber.
    Type: Grant
    Filed: April 10, 2006
    Date of Patent: January 25, 2011
    Assignee: Tracto-Technik GmbH
    Inventors: Franz-Josef Püttmann, Gerhard Balve
  • Patent number: 7836969
    Abstract: The invention relates to a method for controlling a pressure fluid operated percussion device comprising a working chamber for pressure fluid and in the working chamber a transmission piston installed movably with respect thereto so as to enable a tool installed in the percussion device to be pressed against a material to be broken in order to generate a stress pulse, and to a percussion device. The method comprises adjusting the length of the stress pulse by adjusting the time during which pressure influences the transmission piston. The percussion device comprises an adjustment element and adjustment means for adjusting the influence time of the pressure of the pressure fluid being fed via a control valve and influencing the transmission piston.
    Type: Grant
    Filed: January 4, 2006
    Date of Patent: November 23, 2010
    Assignee: Sandvik Mining and Construction OY
    Inventors: Erkki Ahola, Mauri Esko, Aimo Helin, Markku Keskiniva, Jorma Mäki, Juha Piispanen
  • Patent number: 7832497
    Abstract: A post driver having rotational handles and a dampening device adapted to isolate the hands and arms of the user from shock.
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: November 16, 2010
    Inventor: Robert Wilson
  • Patent number: 7823654
    Abstract: An impact driver for driving elongate objects into a body has, a chassis, a ram supported by the chassis in a manner allowing rectilinear movement of the ram relative to the chassis between two limits, and a linear induction motor. The linear induction motor has a stator mounted to the chassis and positioned to operatively interact with a linear induction motor reaction member being of a conductive metal material. The reaction member is carried by the ram in a manner to allow the ram to oscillate between the two limits by the stator of the linear induction motor. A first limit being a retracted position and a second limit being an impact position to which the ram is accelerated from the retracted condition by the stator and at which the ram imparts an impact force on the elongate object in the elongate direction thereof.
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: November 2, 2010
    Assignee: Ramet Holdings Ltd
    Inventor: David Kennett
  • Patent number: 7802566
    Abstract: A barbecue kit includes a threaded rod having a bore in its interior along its longitudinal axis. An elongated stake having a sharp and a blunt end loosely fits into the interior bore of the threaded rod. The combination of rod and stake include a functional mechanism for allowing the threaded rod to act as a slide hammer to drive the stake into the ground without allowing the rod to fall along the entire length of the stake. A grill having a handle includes a plate with a substantially circular cut-out. The distance and configuration of the cut-out and handle are dimensioned in such a way that the grill can be hung at any place on the threaded rod with the circular cut-out engaging the threads. A pan suitable for holding items to be cooked, or charcoal, or like fuel suitable for cooking, has a like handle which is nevertheless removable and reversibly mountable on the pan. The pan can be similarly hung on the rod either with its hollow or with its substantially flat side up on the threaded rod.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: September 28, 2010
    Inventor: Robert Faught
  • Patent number: 7775294
    Abstract: This invention discloses a percussion toggle device of a percussion driller. It includes bottom ratchet wheel that joggles the top ratchet wheel fixed in the output main shaft of the percussion driller, the locking ring used to lock the rotating direction of bottom ratchet wheel, the ejector rod to eject the locking ring, the slide rod that works with ejector rod to make it rise or fall, the percussion button connecting the slide rod, the positioning device to fixate the position of slide rod, and the reset device that works with the positioning device to remove the position limitation by the positioning device. This invention locks the rotating direction of bottom ratchet wheel through the independent percussion button, slide rod and ejector rod. In this way, the percussion toggle and the adjustment of torque force of the percussion driller can be separated. When using the percussion button, the user can toggle their operation between percussion and torque force.
    Type: Grant
    Filed: July 23, 2008
    Date of Patent: August 17, 2010
    Assignee: Dongguan Qunsheng Powder Metallurgy Co., Ltd.
    Inventors: Xi-Ren Ren, Zhi-Wei Bai, Ran-Ran Xia
  • Patent number: 7748472
    Abstract: A hammer drill has an elastic member without using a coil spring or the like on an intermediate spindle to compact a housing and decrease cost. The elastic member that elastically engages a clutch with a second gear and/or a boss sleeve includes first to third guide spindles, first and second interlock plates, and a coil spring. The guide spindles are provided in parallel with an intermediate spindle. The first and second interlock plates are provided at the first to third guide spindles and slidable integrally with the clutch by engaging with the clutch. The coil spring energizes the first and second interlock plates along the first to third guide spindles.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: July 6, 2010
    Assignee: Makita Corporation
    Inventor: Kiyonobu Yoshikane
  • Patent number: 7717190
    Abstract: A method and software product for controlling a percussion device belonging to a rock-drilling machine, and a percussion device. The impact frequency of the percussion device is set so that the percussion device forms a new compression stress wave to the tool always when reflected waves from the previous compression stress waves reach a first end of the tool. This requires that the impact frequency be set proportional to the propagation time of the stress wave, whereby the length of the used tool and the propagation velocity of the stress wave in the tool material are to be noted.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: May 18, 2010
    Assignee: Sandvik Mining and Construction Oy
    Inventors: Markku Keskiniva, Jorma Mäki, Aimo Helin, Mauri Esko, Erkki Ahola
  • Patent number: 7708084
    Abstract: A portable power drill or hammer drill having a housing (12) which consists in particular of half shells (13, 14) and accommodates a manual gearbox (26), wherein a shift element (59) that can be rotated by hand converts its rotary movement into a shift movement, can be produced cost-effectively and can be easily operated, without lubricant escaping from the housing (12), by the shift element (59) consisting of a shell-like handle part (100) which can be joined together with a further, shell-like shift part (102) in a sealing manner from outside and inside relative to a housing shell (13).
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: May 4, 2010
    Assignee: Robert Bosch GmbH
    Inventors: Achim Duesselberg, Andre Ullrich, Kurt Sieber, Thomas Brinkmann
  • Patent number: 7681664
    Abstract: A percussion drill, and methods of using the same, including a shank in mechanical alignment with a piston-hammer and a valve in fluid communication with the piston-hammer. The percussion drill further includes an internal hydraulic dampening system for reducing the velocity of the piston-hammer when the shank is forward of a power position relative to the velocity of the piston-hammer when the shank is in a power position. Preferably, the internal hydraulic dampening system includes mechanical alignment of a portion of the piston-hammer with a port in fluid communication with the valve, operable to reduce fluid flow into an area surrounding the valve when the piston-hammer is forward of its position relative to its normal operation.
    Type: Grant
    Filed: May 1, 2008
    Date of Patent: March 23, 2010
    Inventors: William N. Patterson, Glenn R. Patterson
  • Patent number: 7677327
    Abstract: A percussion mechanism for a repetitively hammering hand power tool in the form of a rotary hammer has a striker movable axially forward and backward in a guide barrel and imparting impacts directly and without any intermediate parts to an end section of a tool bit that is insertable into the hand power tool, a device that exerts pressure on the striker, by which the striker is capable of being set into a forward motion in the direction of the tool bit, a blocking element, with which the striker is blockable in its forward motion, and the striking frequency of the striker is adjustable by controlling the blocking time of the blocking element, so that the striking frequency of the striker depends on how long the blocking element blocks the forward motion of the striker.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: March 16, 2010
    Assignee: Robert Bosch GmbH
    Inventors: Gerhard Meixner, Juergen Lennartz
  • Publication number: 20100059277
    Abstract: A superior ram-boring machine “mole”, employing compressed air to drive a reciprocating piston onto either forward or rearward anvils thereby imparting momentum. Wherein a control valve received into the rear of the piston interacts with ports therein determining its stroke characteristics. The end receiving impacts, and hence the direction of action are determined by accurately positioning the control valve forwardly or rearwards. Incorporating a robust, air-on, fail-safe “Rapid Reverse” mechanism, actuated by a small rotation of the air hose. Whereby guide means and an indexing collar incorporating or comprising encompassing spring or elastic means having inter-engaging features deforms by flexing and or compression to disengage and is biased to re-engage with corresponding features to position and lock the control valve into forward and reverse settings; thereby assisting easy switching, location and retention of operating positions.
    Type: Application
    Filed: February 14, 2007
    Publication date: March 11, 2010
    Inventors: Ian Burke, Lindsay Schultz, Mark Taylor, Neil Lievesley
  • Patent number: 7654338
    Abstract: A powered hammer includes a housing, a tool holder coupled to the housing and configured to hold a tool, a motor within the housing, a piston slideably mounted within the housing, a drive mechanism that converts rotary output of the motor into a reciprocating motion of the piston, a ram slideably mounted forward of the piston and that is reciprocatingly driven by the piston, and a beat piece support mounted in the housing forward of the ram. A beat piece is slideably supported by the beat piece support. The beat piece is repetitively struck by the ram and that in turn repetitively strikes an end of a tool when the tool is held in the tool holder to transfer the momentum of the ram to a tool. The beat piece support includes a seal that is slidingly engaged by the beat piece. The seal includes an absorbent material.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: February 2, 2010
    Assignee: Black & Decker Inc.
    Inventors: Rainer Herting, Ulrich Berghauser
  • Patent number: 7637327
    Abstract: The invention relates to a percussive tool having an oscillatory drive (3), the force of which is transmitted to a tool bit holder (25) by way of a drive member (17). Extending through the percussive tool is a longitudinal opening that allows a rod-shaped object, such as, for example, a guide wire, to be guided through the percussive tool. The tool bit holder (25) has a seat (34), which can receive the tool bit in different orientations. Moreover, the tool bit holder (25) is made of a combination of light metal and steel, which allows a reduction in acceleration forces and noise generation. A saddle-shaped coupling (24) is provided between the tool bit holder (25) and the drive member (17), which guarantees a tight fit.
    Type: Grant
    Filed: May 17, 2005
    Date of Patent: December 29, 2009
    Assignee: Grünig & Elminger AG
    Inventor: Daniel Grünig