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| Number | Title | Issue Date |
| 8006777 | Hand-held power tool A hand-held power tool for driving a cutting or grinding working tool (11) includes a running gear (13) having a roller (15) and a support section (14) for supporting the roller (15), and a locking device (20) for locking th... | 08/30/2011 |
| 7997351 | Pneumatic drifter with replaceable foot pieces Pneumatic drifters containing a drifter cylinder with removable feet and associated methods for using the pneumatic drifters are described. The removable feet are connected to feet pad of a drifter cylinder with multiple fasteners. The mating surfaces of the feet an... | 08/16/2011 |
| 7789167 | Power assist lever arm attachment 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 dr... | 09/07/2010 |
| 7328755 | Hydraulic drill bit assembly In one aspect of the present invention a drill bit assembly has a body portion intermediate a shank portion and a working portion. The working portion has at least one cutting element and the body portion has at least a portion of a jackleg apparatus. The jackleg ap... | 02/12/2008 |
| 7282637 | Grounding system Exemplary embodiments provided herein may include segmented grounding system, including a bit including a coupling portion at a first end, and a generally tapered second end, a shaft with a first end configured to couple to the coupling portion of the bit, and a sec... | 10/16/2007 |
| 7270196 | Drill bit assembly In one aspect of the present invention a drill bit assembly comprises a body portion intermediate a shank portion and a working portion. The working portion has at least one cutting element. The body portion has at least a portion of a reactive jackleg apparatus whi... | 09/18/2007 |
| 7237706 | Drop hammer Embodiments of the present invention pertain to a drop hammer comprising a load, an actuator connected to the load, and a fluid circuit that is connected to the actuator and is connectable to a fluid source, such as a source of hydraulic power. The fluid circuit is ... | 07/03/2007 |
| 7226252 | Hand-held drill leverage unit A hand held drill leverage unit for supporting, positioning, and leveraging a drill. The leverage unit has a main lever arm pivotally supported by a fulcrum unit. A drill end of the lever arm supports the drill, while an opposing, longer, handle end of the lever all... | 06/05/2007 |
| 7198119 | Hydraulic drill bit assembly In one aspect of the present invention a drill bit assembly has a body portion intermediate a shank portion and a working portion. The working portion has at least one cutting element and the body portion has at least a portion of a jackleg apparatus. The jackleg ap... | 04/03/2007 |
| 7178878 | Chisel A channel chisel for forming a channel in a work piece, the channel chisel comprising a shaft having a longitudinal axis, a tip at one end of the shaft, wherein the tip has a cutting edge for cutting a work piece and a flute for removal of debris cut from a work pie... | 02/20/2007 |
| 7143845 | Drilling apparatus with anti-vibration inertial body A blast-hole drilling rig includes a carriage, a mast disposed on the carriage, and a rotary head mounted on the mast for up-and-down movement. The rotary head includes: a housing forming an internal chamber, a hydraulically driven motor, and a rotation transmission... | 12/05/2006 |
| 7143840 | Impact tool An impact tool enables a front cover part to be easily attached to and detached from a housing body, with a device having a simplified structure. The front cover part has an annular fastening portion clamped to the outer peripheral surface of a front edge portion of... | 12/05/2006 |
| 7128165 | Excavation system and method A system and method of cutting a core out of a finished surface for keyhole excavation provides a truck with a turret to which a support arm supporting the cutter assembly is mounted, and a stabilizing member remote from the turret, which allows the turret to be rot... | 10/31/2006 |
| 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 |
| 7063172 | Grounding rod driving device A driving assembly includes a driving device that is slidable along one or more vertical supports as the driving device drives a driving member into an object. The driving assembly may be suspended from a crane or other overhead support, whereby the vertical support... | 06/20/2006 |
| 6926094 | Apparatus for manufacturing operations using non-contact position sensing 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 movea... | 08/09/2005 |
| 6921095 | Hand trolley with winch operated lifting carriage A hand trolley includes a chassis formed from side frames comprising parallel frame members, wheels and a base platform provided with a load lifting carriage having a lifting surface. The carriage can be raised from a low position on the base platform to an elevated... | 07/26/2005 |
| 6907943 | Electric hammer It is, accordingly, an object of the present invention to provide an electric hammer with improved construction, while ensuring the vibration reduction performance. According to the present invention, a representative electric hammer may include a hammer bit, a driv... | 06/21/2005 |
| 6902093 | Centering punch A centering punch includes a first body, a second body, a punching head, an elastic body, an elastic member, a push member, and a spring. Thus, the tapered portion of the punching head is moved along the tapered face of the first body, and the punching head is moved... | 06/07/2005 |
| 6843328 | Flexible track drilling machine 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 cu... | 01/18/2005 |
| 6752221 | Self-supporting pneumatic hammer positioner with universal joint A self-supporting pneumatic hammer positioner for effortless command and control by an operator of a pneumatic hammer. The positioner comprises a rigid elongated template having a handle at a first end portion thereof, a saddle mount for a pneumatic hammer at a seco... | 06/22/2004 |
| 6666282 | Impact tool carriage system 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 abov... | 12/23/2003 |
| 6464020 | Apparatus and method to drill and lift core-drilled specimens from an aggregate medium An single apparatus to drill and lift core specimens from an aggregate field includes a frame structure that can be deployed to a workface and is adapted to hydraulically deploy a rotating core drilling bit upon that workface to cut a core specimen from t... | 10/15/2002 |
| 6315059 | Portable water well drill The present invention is a portable drilling rig having a support tower. A drilling engine, mounted within a cradle, and a lift winch are attached to the support tower. A stabilizer bar is attached to the lower end of the support tower to prevent swaying ... | 11/13/2001 |
| 6131674 | Gripping apparatus for resisting sliding of drilling machine A gripping apparatus for resisting sliding of a drilling machine in first and second directions during drilling operations is provided. The gripping apparatus is pivotably mounted on the anchoring assembly of the drilling machine. The drilling machine inc... | 10/17/2000 |
| 6105684 | Roof bolter or a roof bolt installation apparatus 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... | 08/22/2000 |
| 6050345 | Ergonomic tool with lift assist mechanism An ergonomic demolition tool includes a jackhammer and a lift assist mechanism having a wheeled caster assembly. The lift assist mechanism has a frame which is movable between upper and lower positions to provide a lifting force to assist the jackhammer o... | 04/18/2000 |
| 5938376 | Automated temporary roof support, bolter and method 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 mach... | 08/17/1999 |
| 5667021 | Apparatus for driving grade stakes A grade stake driver includes a frame for supporting a hammer and a grade stake under the hammer. A shuttle secured to the hammer movably mounts onto the frame to connect the hammer to the frame. A hoist secured to the shuttle mounts onto the frame to per... | 09/16/1997 |
| 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 with several pivotal pusher plates which are implemented one... | 12/29/1992 |
| 5012873 | Device for forcing a reflective highway post into the ground A mobile device for forcing a highway post into the ground in the vertical position, especially where the highway post is flexible and made of fiberglass, which involves a vertical column spaced from and supported by the mobile device, guide means mounted... | 05/07/1991 |
| 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 guide 2 and cylinder 37 are vertically slideable on a rail 3... | 02/05/1991 |
| 4986370 | Pneumatic hammer lift An apparatus for lifting a pneumatic hammer from the hammer's work surface. A pneumatic lift attachment is provided having a support housing. Attached to the support housing is a lift plate, containing a guide hole and an adjustable chain, for securing a ... | 01/22/1991 |
| 4823887 | Working/assembling device with self-clamping means A device for applying a working or assembling process to an article at an appropriately selected position as temporarily mounted to a supporting plate through a hole formed therein, having a housing of a generally twofold tubular structure, an annular pis... | 04/25/1989 |
| 4703698 | Track mounted welding head base having cam pivoted drive assembly A welding head base to facilitate the mounting of a welding head assembly thereon for the purpose of welding a joint between abutted ends of a pipe. The base is mounted on the edges of a thin, sheet material, continuous band track and is capable of low fr... | 11/03/1987 |
| 4637475 | In-the-hole drill A compact, easily disassembled, minimum headroom drilling unit is disclosed. The drill, especially useful for newly developed vertical retreat mining methods, drills at compound angles from the vertical and horizontal directions. Low headroom is achieved ... | 01/20/1987 |
| 4601352 | Automatic compactor An automatic compaction assembly for compacting samples of asphaltic or bituminous materials is disclosed. A slide hammer is carried for vertical motion along a guide rod which has a compaction foot at a lower end. A drive chain is driven along a generall... | 07/22/1986 |
| 4548279 | Tool extractor A demolition tool is provided with an extractor for removing the chisel or drill from the working surface. The extractor is a piston equipped with a foot which maintains contact with the work surface. When the tool is to be extracted the piston is actuate... | 10/22/1985 |
| 4497378 | Drilling and bolting turret A turret for mining appliances comprises a girder serving as a guide for a drilling carriage and a bolting carriage, which is mounted to pivot and slide along an axis at the end of a support arm. The girder is integral with two bearings, mounted to rotate... | 02/05/1985 |
| 4448338 | Pneumatic nail driver In a pneumatic nail driver, compressed air drives a working piston in the driving direction within a working cylinder. An inlet valve controls the flow of compressed air into the working cylinder. A sensing element mounted on the front end of the driver m... | 05/15/1984 |
