Relatively Adjustable Work Engaging Elements Patents (Class 173/37)
  • Patent number: 11332903
    Abstract: A self-adjusting hydraulic static penetrating device and method suitable for a seabed slope area is provided. The device includes an upper adjustable injection platform and a lower adjustable supporting platform. The upper adjustable injection platform is fixedly connected with the upper surface of the lower adjustable supporting platform. The upper adjustable injection platform includes a rack, a control cabin, an injection mechanism, a hydraulic station, a balance weight and first jacks. The control cabin, the injection mechanism, the hydraulic station, the balance weight and the first jacks are all arranged on the rack. The four first jacks are installed at the bottom of a steel structure frame, and the first jacks are fixed to the lower adjustable supporting platform. The device is simple in structure and low in cost, and can guarantee, to the maximum extent, that the overall gravity center of the device is always constant or slightly changes.
    Type: Grant
    Filed: September 23, 2021
    Date of Patent: May 17, 2022
    Inventors: Kai Lu, Huiliang Yang, Yuan Yang, Panfeng Li, Jingtao Zhao, Rui Shan, Yiyong Yu, Jun Sun
  • Patent number: 9963957
    Abstract: A bypass plunger combines a unitary or one-piece hollow body-and-valve cage, retains a dart valve within the valve cage portion of the hollow body using a threaded retaining nut secured by crimple detents. A series of helical grooves surround the central portion of the outer surface of the hollow body of the plunger to control spin during descent. A canted-coil-spring disposed within the retaining nut functions as a clutch. The valve cage includes ports that may be configured to control flow through the plunger during ascent. Other embodiments include clutch assemblies using canted-coil springs with split bobbins, and valve stems surfaced to achieve specific functions. Combinations of these features provide enhanced performance, durability and reliability at reduced manufacturing cost, due primarily to the simplicity of its design.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: May 8, 2018
    Assignee: Flowco Production Solutions, LLC
    Inventors: Garrett S. Boyd, Mitchell A. Boyd
  • Patent number: 9624996
    Abstract: A bumper spring assembly having a one piece mandrel including an integral head piece is further configured with a cage assembly retained on the mandrel with a cage nut locked to the mandrel to obviate the need for pins, set screws, and the like, to provide a more robust assembly. In two embodiments the cage nut is locked to the mandrel in a swaging operation. Improved flow of fluids through and around the bumper spring assembly are also provided.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: April 18, 2017
    Assignee: Flowco Production Solutions, LLC
    Inventors: Mitchell A. Boyd, Garrett S. Boyd
  • Patent number: 9388649
    Abstract: Offshore drilling installation comprising a platform selected from the group comprising a vessel, a pontoon, a jack-up, and further comprising a drill string drivingly connected with said platform and optionally provided with a heave motion compensator, wherein at its lower end the drill string is pro-vided with a drill bit, and wherein a seabed template suspended with lift wires from the platform is placed on a seabed, and wherein clamping means mounted in the seabed template are provided for fixing the drill string relative to the seabed template, which clamping means are embodied as a chuck which is arranged for clamping the drill string whilst enabling the drill string's rotation.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: July 12, 2016
    Assignee: FUGRO ENGINEERS B.V.
    Inventor: Peter Looijen
  • Patent number: 9334706
    Abstract: The present invention relates generally to a Top Drive Pipe Spinner (TDPS). The TDPS is a tool that allows for the setting of casing without a specialized crew or any additional power source. By employing the weight of the existing top drive to set slips on the casing collar, the TDPS allows one casing to be threaded onto the next in a timely and efficient manner. The casing tongs of the TDPS use passive release weight to release the casing collar from the casing to allow for the successive insertion of another casing section. The top drive spins the TDPS and compresses the unit onto the casing, then lifts the unit and releases the casing when desired.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: May 10, 2016
    Inventor: C. Allen Phillips
  • Patent number: 8061436
    Abstract: A mobile basket for consolidation work on walls is provided with a main frame, configured in the front part for hoisting and for translating the new basket up and down a wall and having legs fitted on the sides of said main frame. A secondary frame or cage is structured for supporting a magazine of drill rods, as well as a mast or drill and a mechanical hand applied to the secondary frame or cage positions parallel to its longer side and essentially perpendicular to the main frame. The mechanical hand, positioned between the mast or drill and the magazine, is configured to take a rod from the magazine and transfer it to the mast or drill.
    Type: Grant
    Filed: August 6, 2004
    Date of Patent: November 22, 2011
    Inventors: Roberto Zannini, Rezia Molfino, Enzo Rizzi, Giorgio Pezzuto, Manuel Armada, Pasqualino Comacchio
  • Patent number: 7789167
    Abstract: A power assist lever arm attachment includes a drill, an L-shaped drilling head carried by the drill, an arm actuation cylinder carried by the drill, an arm piston extendable from the arm actuation cylinder, a lever arm pivotally carried by the arm piston and the drilling head and a bracket-engaging arm extending from the lever arm.
    Type: Grant
    Filed: April 16, 2008
    Date of Patent: September 7, 2010
    Assignee: The Boeing Company
    Inventors: Scott A. Martin, Dustin D. Ribble, David N. Nappier
  • Patent number: 7721817
    Abstract: A fastener driving device includes a housing containing an engine for driving a fastener through a flooring board and into a sub-floor, a nosepiece through which fasteners are driven, a magazine for supplying a plurality of fasteners for the engine to drive, and a shoe mounted for movement relative to the nosepiece. The shoe locates the engine relative to the flooring board so that the fastener is driven into the flooring board at an angle. The shoe includes a bottom workpiece engaging surface for engaging a top surface of the flooring board, and the nosepiece includes a forward workpiece engaging surface for engaging a front surface of the flooring board. The forward surface extends a distance below the bottom surface. One of the bottom surface and the forward surface is movable with respect to the other to adjust the distance that the forward surface extends below the bottom surface.
    Type: Grant
    Filed: April 4, 2006
    Date of Patent: May 25, 2010
    Assignee: Stanley Fastening Systems, L.P.
    Inventors: David M. McGee, Prudencio S. Canlas, Jr., William J. Palm, Laurence W. Tremaine
  • Publication number: 20090090526
    Abstract: A mobile basket for consolidation work on walls is provided with a main frame (T), configured in the front part for hoisting and for translating the new basket up and down a wall and having legs (D) fitted on the sides of said main frame (T). A secondary frame or cage (R) is structured for supporting a magazine (S) of drill bits, as well as a mast or drill (P) and a mechanical hand (M) applied to the secondary frame or cage (R) positions parallel to its longer side and essentially perpendicular to the main frame (T). The mechanical hand (M), positioned between the mast or drill (P) and the magazine (S), is configured to take a bit from the magazine (S) and transfer it to the mast or drill (P).
    Type: Application
    Filed: August 6, 2004
    Publication date: April 9, 2009
    Inventors: Roberto Zannini, Rezia Molfino, Enzo Rizzi, Giorgio Pezzuto, Manuel Armada, Pasqualino Comacchio
  • Patent number: 7032686
    Abstract: The drilling and bolting head (7) of compact structure, is designed for use in mine galleries of small height. It comprises: a transverse table (8) connected to the carrying vehicle, preferably with a device (9 to 12) for lifting this table (8); a slide (13) displaceable along the table (8); an intermediate support (16) displaceable vertically on the slide (13); a vertical beam (21) mounted pivotally on the intermediate support (16); a vertical slideway (23) guided vertically on the beam (21); a drill (26), with a device (33, 34) for the drilling and setting of bolts, which is guided vertically on the slideway (23); motorized device (14, 18, 30) for controlling the various movements. The intermediate support (16) possesses an upper part (20) which can be used as a prop, in combination with a jack (18) arranged along the vertical pivot axis (19) of the beam (21).
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: April 25, 2006
    Assignee: Sandvik Tamrock Secoma SAS
    Inventors: Jean-Claude Barthomeuf, Alain Comorge
  • Patent number: 6926094
    Abstract: Apparatus and methods for manufacturing operations using non-contact position sensing are disclosed. In one embodiment, an apparatus includes a track assembly adapted to be attached to a workpiece, a carriage assembly moveably coupled to the track assembly and moveable relative to the workpiece, and a position sensor. The position sensor includes a sensor element adapted to detect at least one edge of an index feature on the workpiece from a distance away from the index feature. In an alternate embodiment, the position sensor may include a sensing circuit that receives an analog signal from the sensing element and provides both analog and digital output signals. In another embodiment, a controller that controls manufacturing operations may be mounted directly on the carriage assembly.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: August 9, 2005
    Assignee: The Boeing Company
    Inventors: Paul R. Arntson, Ronald W. Outous, Theodore M. Boyl-Davis, James N. Buttrick, Jr.
  • Patent number: 6843328
    Abstract: A flexible track drilling machine employs a pair of rails that are flexible in one direction to conform to a non-flat workpiece surface and are substantially stiff in a direction parallel to the workpiece surface. The rails are attached to the workpiece by vacuum cups spaced along each rail. An X-axis carriage is slidably mounted on the rails by rollers mounted on flexible spring plates affixed to the carriage. A drill or other device to be positioned is mounted on a Y-axis carriage that is slidably connected to the X-axis carriage. The three-dimensional surface of the workpiece is mathematically transformed into a two-dimensional flat pattern, and the positioning of the carriages is controlled based on the flat pattern.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: January 18, 2005
    Assignee: The Boeing Company
    Inventors: Theodore Martin Boyl-Davis, James N. Buttrick, Jr., Roger A. Gage, Darrell D. Jones, Kostandinos D. Papanikolaou
  • Patent number: 6796388
    Abstract: This invention provides a roof bolt installation apparatus including a drill stabilizing mechanism including a base having a cylindrical bore therein, and a stabilizing rod extendable from the base and slidably located in the bore. The rod has a distal end, and a drill stabilizing end plate is mounted on the rod distal end. The roof bolt installation apparatus also includes a drilling unit which is adapted to rotatably carry a drill, the drilling unit being slidably mounted on the drill stabilizing mechanism, and a mechanism for moving the drilling unit along the drill stabilizing mechanism. The roof bolt installation apparatus also includes a drill depth control device including a base, a top adapted to engage the mine roof, and at least two bars connected between the drill depth control base and the drill depth control top. The bars pass through openings in the drill stabilizing plate.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: September 28, 2004
    Assignee: Joy MM Delaware, Inc.
    Inventor: Phill O'Meley
  • Patent number: 6666282
    Abstract: A carriage system supports an impact or driver tool. The carriage system has a support member that extends upwardly from a base platform. Support arms are rotatably connected to the support member at medial portion of the arms at different elevations above the support member. A proximal end of each of the arms rotatably connects to a weight, while a distal end of each of the arms is adapted to rotatably connect to the driver tool. The weight is located on an opposite side of the support member from the driver tool when the driver tool is attached. When the weight is moved in a vertical direction, the arms rotate in combination with the movement of the weight. The arms rotate about their respective medial connections, thereby forcing the ends that rotatably connect to the driver tool to move in a vertically opposite direction than the weight.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: December 23, 2003
    Inventor: Jake Merrick
  • Patent number: 6602026
    Abstract: The present invention provides a mining apparatus for installing bolts into a mine entry, said apparatus including: a frame having a forward end, a rearward end and lateral sides; an upstanding bolter support wall attached to said forward end of said frame; a laterally extending guide frame mounted to said support wall which extends along a lateral plane which is generally parallel to the support wall; at least one bolting rig slidably mounted to said guide frame; and translation means for selectively moving the bolting rig laterally along the guide frame relative to the support wall.
    Type: Grant
    Filed: July 12, 2000
    Date of Patent: August 5, 2003
    Assignee: Joy MM Delaware, Inc.
    Inventor: Brad Neilson
  • Patent number: 6497536
    Abstract: The invention provides an apparatus (2) for installing bolts into a mine entry, said apparatus including: a frame (8) having a forward end (20), a rearward end and lateral sides; at least one bolting rig (140, 142, 144, 146) operatively mounted to said forward end of said frame; at least one roof support member attached to said forward end of said frame (8) separate from said bolting rig (140, 142, 144, 146) for selectively supporting said mine entry as bolts are installed therein; and an operator station (990) on said frame for supporting an operator thereon during operation of said at least one roof support member.
    Type: Grant
    Filed: July 12, 2000
    Date of Patent: December 24, 2002
    Assignee: Joy MM Delaware, Inc.
    Inventors: Brad Neilson, John R. Frederick
  • Patent number: 6386640
    Abstract: The invention provides a vehicle which employs hollow structural members to store and cool hydraulic fluid used by the vehicle or by equipment located thereon. The preferred form of the invention provides an apparatus for installing bolts into a mine entry said apparatus including: a frame having a forward end, a rearward end and lateral sides, said frame defining a generally horizontal work area; at least one drive for propelling said frame within said entry; at least one bolting rig attached to said frame; a deck member attached to said frame and covering said frame for supporting an operator thereon; and a return oil tank incorporated into said frame to receive return hydraulic oil from said bolting rig or rigs.
    Type: Grant
    Filed: July 12, 2000
    Date of Patent: May 14, 2002
    Assignee: Joy MM Delaware, Inc.
    Inventor: Brad Neilson
  • Patent number: 6257350
    Abstract: A multiple position stakedown assembly for a horizontal directional drill machine which installs stakes into the ground in a variety of different locations with a single drive head. The stakedown assembly includes a vertical tower that is rotatably mounted on a base plate. Locator ports for the stakes are provided in the base plate in a segmentally circular pattern around the tower. A drive head cantilevered from the top of the tower rotates with the tower to positions where it can install stakes through any of the ports.
    Type: Grant
    Filed: February 11, 2000
    Date of Patent: July 10, 2001
    Assignee: Case Corporation
    Inventors: Robert G. Draney, Donald C. Sassor, Dmitry I. Spivak, Jeffrey S. Volden
  • Patent number: 6112829
    Abstract: The invention relates to a rock drill air leg control system incorporated in the backhead (10) of a rock drill. The system comprises a single spool valve (22) having two manual controls (46, 53), one for setting a trust applied by an air leg to a rock drill and the other for retracting the air leg without affecting the thrust setting achieved by operation of the first control. The first manual control is in the form of a twist-grip control (53) which is arranged to set the axial position of a spring-biased valve spool (30) in the valve (22) via a pin (50) and a plunger (46). The plunger (46) also forms the second of the manual controls and can be pressed against the spring-biased valve spool (30) to vary the axial position of this spool.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: September 5, 2000
    Inventor: Clive Wilfred Hunt
  • Patent number: 6105684
    Abstract: The present invention relates to improvements in the operation and construction of roof bolters or roof bolt installation apparatus. The improvements comprise a roof bolter constructed so that the critical moving parts of its timber jack, feed frame, feed carrier and rotational unit are comprised of a rod and sleeve construction. Such construction allowing the protection of surfaces. The construction also includes feature of a spaced apart rod and sleeve construction which allows motive power units to be housed within the confines of the timber jack and feed carrier. The spaced apart arrangement also provides stability to the roof bolter.
    Type: Grant
    Filed: August 7, 1997
    Date of Patent: August 22, 2000
    Assignee: Cram Australia Pty Ltd
    Inventors: John Pointer, Brad Nellson, Peter Hanna
  • Patent number: 6079504
    Abstract: A drill rig is provided which has a mobile trolley having a telescopically extendible post for locking it in position relative to the hanging wall in an underground mine. The post supports in articulated manner, at least one and generally two vertically and laterally spaced drill booms adjustable in position at least within limits relative to the height of the post. A third drill boom may operatively be supported by the trolley itself in a lower-most position. The trolley is preferably supported on driven wheels and the drills, post, and any drive motors are preferably hydraulically driven by high pressure water.
    Type: Grant
    Filed: April 13, 1998
    Date of Patent: June 27, 2000
    Assignee: Northam Platinum Limited
    Inventor: John Robert Kendall
  • Patent number: 6076615
    Abstract: The present invention is directed to a multi-linked working boom for a working machine which carries at the other end a hydraulically maneuverable and hydraulically driven working equipment, where the boom comprises a first pair of link arms which is connected to the working machine and a second pair of link arms which is jointed to the first pair of link arms via a link arm-forming support member, which is intermittently fixable against a support foundation by means of the first pair of link arms.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: June 20, 2000
    Inventors: Knut Dalland, Ingvar Osen
  • Patent number: 6073704
    Abstract: Supporting clamps for a tool such as, for example, a pile driver machine are used to tilt a machine support relative to a horizontal plane. The clamps include a pair of jaw elements one of which is received on a pivot and the other of which has a pair of parallel spaced pistons. The clamp jaw elements gird a fixed reference device to support the tool securely for subsequent operations. Different pressures applied to the two pistons causes the clamp to tilt about the fixed reference device, and thereby to tilt the tool to which it is attached. The difference in pressure is controlled to rotate the tool as desired. In a second embodiment of the invention, the desired angle is established by controlling an angle of a backup surface, and applying equal pressure to the two pistons. The fixed reference device is driven into the angled backup surface to establish the desired tilt angle. In a further embodiment, one piston is disposed at each side of the gap. The two pistons are spaced apart along the gap.
    Type: Grant
    Filed: August 11, 1997
    Date of Patent: June 13, 2000
    Assignee: Tosa Machinery Industries Co., Ltd.
    Inventors: Kazuhiko Yasuoka, Sinichi Okabayasi, Akira Nishimura, Keiichi Nakamura
  • Patent number: 5938376
    Abstract: In an automated temporary roof support and roof bolting machine there are several safety features. The machine has forward operator's stations on each side of the machine. All the controls for operating the machine are in the operator's stations. The machine is pulled forward, a precise distance, by a hydraulic cylinder with a limited stroke. The pulling of the machine is controlled by safety switches requiring both operators to operate the switches in unison.
    Type: Grant
    Filed: May 6, 1997
    Date of Patent: August 17, 1999
    Inventor: Robert J. Alcaraz
  • Patent number: 5139092
    Abstract: 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 of which can be fastened to the driver housing and the other of which can be connected to a reaction structure which is clamped to the workpiece. The two barrels are coupled together for limited rotation relative to each other which facilitates placement of the device on the reaction structure and securing it in place thereon, and also provides a torque path for reaction torque from the driver housing through the two barrels of the device to the reaction structure and thence to the workpiece. The reaction structure has a series of positioning stops that facilitate quick and accurate positioning on the workpiece, and a power operated clamp for securely connecting the reaction structure to the workpiece.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: August 18, 1992
    Assignee: The Boeing Company
    Inventor: Terrence M. Boyle
  • Patent number: 5044568
    Abstract: A hand crusher with a main body, which consists of a cylinder unit having a built-in oblong hydraulic cylinder and a parallel plate unit bonded on the periphery of said cylinder unit. Crushing arms are pivotally supported on the lower portion of the parallel plate unit, and the crushing are opened or closed in linkage with a piston rod, which extends from the hydraulic cylinder and makes reciprocal movement along the center line. Slide keys located at the tip of the piston rod engage in guide grooves on the parallel plate unit. A ring-like handle member is rotatably mounted on the rotating unit at the upper end of the cylinder unit, and a left grip and a right grip are connected on both ends of the handle member. On the inner periphery of the rotating unit of the handle member, balls are movably embedded at symmetrical positions, and catching recesses to catch the balls are furnished at every predetermined angle on the outer periphery of the rotating unit.
    Type: Grant
    Filed: August 20, 1990
    Date of Patent: September 3, 1991
    Assignee: Takachiho Kogyo Yuugen Kaisha
    Inventor: Akihiko Shigemizu
  • Patent number: 4854402
    Abstract: A shaft drilling rig comprises a rig head having means whereby it may be attached to a cable so as to be raised and lowered within a shaft being sunk. A central hollow column depends from the rig head and carries a base member at its lower end. There are rig supporting feet carried by the base member. The rig has a plurality of booms each being operatively carried at its upper end by the central column near the rig head to pivot relative to the column and itself carrying at its outer end a feed holder for a beam to carry a rock drill. A plurality of support members are respectively associated with the booms, each such support member being operatively carried at its lower end by the central column near the base member to pivot relative to the column and pivotally engaging its associated boom at a pivot location. Each boom has an extendable section arranged to extend the length thereof which extendable section is located between the upper end of the boom and its said pivot location.
    Type: Grant
    Filed: June 12, 1987
    Date of Patent: August 8, 1989
    Assignees: Delfos & Atlas Copco Limited, Shaft Sinkers Limited
    Inventors: Giovanni Mazzalupi, Bruno Onofri
  • Patent number: 4476940
    Abstract: A lightweight portable drilling apparatus capable of being assembled and disassembled for lifting and moving by helicopter. The apparatus includes a center vertically-oriented drilling tower equipped with a rotary drilling assembly, and having a base supported by a plurality of adjustable leveling legs. Also included is a first module pivotally coupled to one side of the tower base and supported by a flexible tether attached to the module and the drilling tower near the top thereof, and a second module pivotally coupled to the other side of the base of the tower and supported by a flexible tether also attached to the drilling tower near the top thereof and to the second module. Each module includes either a power source, such as a diesel engine, or auxiliary power equipment for supplying power to operate the drilling assembly.
    Type: Grant
    Filed: April 26, 1982
    Date of Patent: October 16, 1984
    Assignee: PDR Manufacturing Corporation
    Inventors: Ronald F. Reichert, Steven K. Kruger, John W. Rhodes
  • Patent number: 4441564
    Abstract: A hole drilling machine which includes a geared stationary drill frame with a guide track to which support legs are attached at either end. A drive shaft made of hollow flexible tubing driven by a motor suspended from the guide track. An adjustable swivel axel to which the drill end is mounted. The drill end is a hollow tube with openings in an end to permit streams of water to wash loose soil out of the hole and assist in the drilling process and a helical knife edge attached thereto. An angled metal piece with exit holes to permit the flow of water is attached to the working end.
    Type: Grant
    Filed: July 27, 1981
    Date of Patent: April 10, 1984
    Inventor: Michael S. Castillo
  • Patent number: 4306626
    Abstract: A hydraulic earth boring machine for forming conduit passageways beneath established surfaces such as roadways, walkways, or the like. The boring machine includes a hydraulic cylinder having an open axial passageway for receiving a boring shaft. A drive cylinder surrounds the boring shaft and is driven by the hydraulic cylinder. A gripping assembly is mounted upon a trailing end of the drive cylinder and selectively couples the drive cylinder to the boring shaft. An elevating and vertical aiming assembly is mounted upon the hydraulic cylinder for facilely providing positioning of the boring machine, in situ, within an earth trench. In addition, an axial bracing and horizontal angling assembly is mounted upon the cylinder for mounting the boring machine within the trench adjacent an established surface.
    Type: Grant
    Filed: May 21, 1980
    Date of Patent: December 22, 1981
    Inventors: John W. Duke, John A. Duke
  • Patent number: 4109733
    Abstract: A control is disclosed for inhibiting the tilting of an earth drilling machine that is supported on hydraulic jacks. A hydraulic downfeed motor for the drill string is operated by a control that has pressure responsive switches connected to the hydraulic jacks, and in the event the drilling machine starts to rise upwardly during drilling one of the pressure responsive switches will operate to shut off fluid pressure to the downfeed motor and to entrap fluid within the motor. The entrapment of fluid in the motor maintains a drilling pressure that permits drilling to continue with a drilling force that will not allow the machine to rise upwardly on the supporting jacks.
    Type: Grant
    Filed: August 29, 1977
    Date of Patent: August 29, 1978
    Assignee: Bucyrus-Erie Company
    Inventor: Robert E. Dummer
  • Patent number: 4059162
    Abstract: A drilling machine is disclosed for use in providing bolt holes in concrete stadium riser steps and the like. The drilling machine includes a relatively stationary base plate, and a foot plate slideable upon the base plate along a predetermined path. The foot plate carries drill mounting means for mounting a plurality of commercially available drills. An operating lever moves the foot plate, drill mounting device and drills toward and away from a vertical drilling face over the base plate.
    Type: Grant
    Filed: June 14, 1976
    Date of Patent: November 22, 1977
    Assignee: Lawrence Brothers, Inc.
    Inventors: James Zbinden, George W. Ries
  • Patent number: 4026370
    Abstract: A hydraulically actuated driving tool is provided with a ground engageable member which is driven into the ground by the action and reaction of a drive mass which is free to slide within the tool and which is repetitively forced away from and back to the ground engageable member in a manner determined by a hydraulic control system. Each repeated cycle of operation engenders two separate forces to drive the ground engageable member into the ground, one being the force exerted by high pressure fluid in the hydraulic control system when the drive mass is forced away from the ground engageable member and the other being the force exerted when the drive mass impacts back upon the ground engageable member. A switch means is provided whereby the returning drive mass initiates the next cycle of operation of the hydraulic control system.
    Type: Grant
    Filed: April 2, 1975
    Date of Patent: May 31, 1977
    Assignee: Secretary of State for Industry in Her Britannic Majesty's Government of the United Kingdom of Great Britain & Northern Ireland
    Inventors: Keith Foster, Philip Smith
  • Patent number: 3967687
    Abstract: A drill apparatus for providing a drain hole in curbing comprises a core drill mounted for longitudinal movement along a horizontal post held between a drill frame and a hooking member positioned in hooking relation with the curb. The horizontal post is tightened in compression while a pair of chains extend between the hooking member and the drill frame for holding the frame in firm contact with the curbing.
    Type: Grant
    Filed: July 29, 1974
    Date of Patent: July 6, 1976
    Inventor: Dwight W. Fowler
  • Patent number: 3940588
    Abstract: A bolt welding gun is provided with supporting legs extending outwardly from the gun housing which can be displaced to accommodate different bolt-attaching situations. The supporting legs can be mounted in a ring-shaped housing part which is rotatable about the driving axis of the gun. Alternatively, the ring-shaped housing part can be formed of individual segments with at least one segment arranged to be pivoted about an axis parallel to the driving axis. In another embodiment, the part of the housing to which the supporting legs are secured, can be provided with a plurality of receptacles greater in number than the supporting legs used so that the legs can be moved between the receptacles in accordance with the support arrangement desired.
    Type: Grant
    Filed: September 24, 1974
    Date of Patent: February 24, 1976
    Assignee: Hilti Aktiengesellschaft
    Inventors: Norbert Oehry, Rainer Wild