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| Number | Title | Issue Date |
| 8172030 | Multiple function control system for work machine A control system for a work machine. The control system allows an operator to selectively maintain control of a ground drive, a work tool, or both the ground drive and the work tool. The system provides a foot pedal movable between multiple positions. The foot pedal... | 05/08/2012 |
| 8066140 | Container door and container door latching and sealing system A door sealing system is used to seal a container of a vacuum system. In a preferred embodiment the vacuum system has a container door supported on a frame and adapted to seal the container when the container door is closed. A latch assembly supported on the contain... | 11/29/2011 |
| 7999551 | Method for detection of signal source using estimation of noise statistics A method for noise signal analysis and communication with an underground transmitter. The method comprises the steps of measuring a noise floor when no signal is transmitted from a transmitter, detecting a signal when the transmitter is transmitting, and estimating ... | 08/16/2011 |
| 7987924 | Automatic control system for connecting a dual-member pipe A system and method of making up and breaking out a dual-member drill string. The system comprises a spindle, a spindle carriage and a drive frame. The drive frame provides thrust to the spindle, while the spindle carriage provides rotation. The spindle has an outer... | 08/02/2011 |
| D640292 | Micro-trenching blade | 06/21/2011 |
| D640291 | Conical cutting element | 06/21/2011 |
| D640290 | Micro-trenching blade | 06/21/2011 |
| 7896107 | System for tracking and maintaining on on-grade horizontal borehole A tracking receiver system is used to track the progress of a downhole tool along a subsurface path having a desired grade. The tracking receiver system is adapted to detect a reference line originating from a reference line receiver and to determine the position of... | 03/01/2011 |
| 7890235 | Determination of remote control operator position A system for controlling a work machine and work tool from a remote controller. The remote controller sends a control signal to a receiver assembly and machine controller. The machine controller processes the control signal to determine the location of the remote co... | 02/15/2011 |
| 7880336 | Electric horizontal directional drilling machine system An electric horizontal directional drilling machine. An electric horizontal directional drilling machine is powered by an electric power assembly. The power assembly is made up of a fuel cell and inverter, or multiple fuel cells with synchronized inverters, are used... | 02/01/2011 |
| 7874396 | Multiple function control system for work machine A control system for a work machine. The control system allows an operator to selectively maintain control of a ground drive, a work tool, or both the ground drive and the work tool. The system provides a foot pedal movable between multiple positions. The foot pedal... | 01/25/2011 |
| 7786731 | Dipole locator using multiple measurement points A receiver and tracking system for identifying a location of a magnetic field source. In a preferred embodiment a plurality of tri-axial antennas are positioned at three distinct points on a receiver frame. Each antenna detects a magnetic field from a source and a p... | 08/31/2010 |
| 7759824 | System and method for detecting an underground object using magnetic field sensing A system and method use magnetic field sensing to detect underground objects for strike avoidance. The system detects magnetic field components for both passive distortions in the magnetic field indicative of a ferromagnetic object and active magnetic fields that ar... | 07/20/2010 |
| 7663373 | Determining beacon location using magnetic field ratios A method and system for identifying a location of a magnetic field source. A total magnetic field is measured during a calibration routine prior to a drilling procedure. During the drilling procedure, a magnetic field measurement is obtained. Using a ratio of the me... | 02/16/2010 |
| 7654340 | Directional reaming system A horizontal directional drilling system is used to drive operation of a guidable reamer assembly connected to a drill string. The guidable reamer assembly preferably has a cutting member with a central longitudinal axis and a support member also having a central lo... | 02/02/2010 |
| 7649474 | System for wireless communication along a drill string A wireless communication and drill string telemetry system. The communication system is used for communicating information along a drill string between a boring tool and a boring machine. An insulator assembly provides an electrically insulated gap between the drill... | 01/19/2010 |
| 7647987 | Multiple antenna system for horizontal directional drilling A system for monitoring the position of a downhole tool assembly having multiple beacons. In a preferred embodiment first and second beacons are adapted to transmit electromagnetic signals indicative of the position of the downhole tool assembly. A receiving assembl... | 01/19/2010 |
| 7628226 | Automatic control system for connecting a dual-member pipe A system and method of making up and breaking out a dual-member drill string. The system comprises a spindle, a spindle carriage and a drive frame. The drive frame provides thrust to the spindle, while the spindle carriage provides rotation. The spindle has an outer... | 12/08/2009 |
| 7624816 | Configurable beacon and method A monitoring system is used to monitor the location and orientation of a downhole tool assembly by detecting an output signal. The downhole tool assembly has a beacon assembly with one or more configurable operation parameters. A transmitting assembly transmits a mo... | 12/01/2009 |
| 7621366 | Multiple function control system for work machine A control system for a work machine. The control system allows an operator to selectively maintain control of a ground drive, a work tool, or both the ground drive and the work tool. The system provides a foot pedal movable between multiple positions. The foot pedal... | 11/24/2009 |
| 7600584 | Pipe handling system with a movable magazine A pipe handling assembly for transporting pipe sections to and from the drill string of a horizontal boring machine. The system comprises a magazine, a cradle for supporting the magazine, a support member, a drive system, and a transfer assembly. The drive system ma... | 10/13/2009 |
| 7528946 | System for detecting deflection of a boring tool A system for monitoring deflection of a downhole tool assembly. The system comprises a beam source directing a beam at a receptor positioned proximate the downhole tool assembly. The receptor detects the position of incidence of the beam at the receptor. A processor... | 05/05/2009 |
| 7510029 | System for tracking and maintaining an on-grade horizontal borehole A tracking receiver system is used to track the progress of a downhole tool along a subsurface path having a desired grade. The tracking receiver system is adapted to detect a reference line originating from a reference line receiver and to determine the position of... | 03/31/2009 |
| 7461707 | Electric horizontal directional drilling machine system An electric horizontal directional drilling machine. An electric horizontal directional drilling machine is powered by an electric power assembly. The power assembly is made up of a fuel cell and inverter, or multiple fuel cells with synchronized inverters, are used... | 12/09/2008 |
| D579955 | Two wheel articulated tool carrier chassis | 11/04/2008 |
| D579464 | Three-wheel articulated trencher | 10/28/2008 |
| D579357 | Bi-pod tracker | 10/28/2008 |
| 7413031 | Apparatus and method for maintaining control of a drilling machine An apparatus is provided for maintaining control of a machine which produces thrust, rotation or other outputs in response to input signals. The apparatus has two distinct parts, namely the operator input portion and the output portion. The operator input portion co... | 08/19/2008 |
| D572730 | Four wheel articulated tool carrier | 07/08/2008 |
| D572274 | Articulated dumper | 07/01/2008 |
| 7392858 | Remote control for a drilling machine A method and apparatus for remotely controlling a machine. A remote operator controls a tracking device including a signal system for selectively emitting a remote enable signal. The remote enable signal is relayed to a control system for the machine. The control sy... | 07/01/2008 |
| D572275 | Articulated tool carrier with tower arm | 07/01/2008 |
| 7389831 | Dual-member auger boring system A system for boring horizontal boreholes and installing products using a dual member drill string. The system is comprised of a boring machine with a frame and a rotary drive supported on the frame, a downhole tool, and a dual member drill string. The drill string c... | 06/24/2008 |
| D571827 | Two wheel articulated tool carrier chassis | 06/24/2008 |
| 7373993 | System and method for locating and tracking a boring tool A system for monitoring the position and orientation of a downhole tool assembly having multiple beacons. In a preferred embodiment the first and second beacons are supported by the downhole tool assembly. Both beacons are adapted to transmit signals that are indica... | 05/20/2008 |
| 7353889 | Rotary driven pipe-bursting tool An apparatus for bursting pipe is preferably adapted to receive rotational energy from the inner member of a dual-member drill string. In a preferred embodiment, a plurality of pipe-bursting members, driven by the interconnected inner members, cut or burst a subterr... | 04/08/2008 |
| 7350594 | System and method for tracking and communicating with a boring tool A system for determining the location of and communicating with a downhole tool assembly. A tracker assembly comprises a vertical transmitting antenna, a plurality of receiving antennas, and a processor. The downhole tool assembly has a beacon assembly comprising a ... | 04/01/2008 |
| 7347283 | Using a rotating inner member to drive a tool in a hollow outer member A rotating inner member is used to drive a downhole tool housed within the hollow outer member of a dual-member drill string. The downhole tool preferably will be adapted to receive rotational energy from the inner member. In a preferred embodiment, the downhole too... | 03/25/2008 |
| 7331409 | Configurable beacon and method A monitoring system is used to monitor the location and orientation of a downhole tool assembly by detecting an output signal. The downhole tool assembly has a beacon assembly with one or more configurable operation parameters. A transmitting assembly transmits an o... | 02/19/2008 |
| 7251567 | Electronically calibrated beacon for a horizontal directional drilling machine A monitoring system for use with a horizontal directional drilling machine and adapted to determine the roll and/or pitch orientation of the downhole tool assembly by detecting signals from a sensor assembly supported by the downhole tool assembly. In a preferred em... | 07/31/2007 |
