Patent application number | Description | Published |
20090260842 | Pneumatic impact piercing tool - 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. | 10-22-2009 |
20090283285 | Pneumatic impact tool - 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. | 11-19-2009 |
20140131110 | Make-Up/Break-Out Device For Drilling Hammers - A make-up/break-out device for use with a hammer used in horizontal directional drilling operations. The hammer comprises a drill bit assembly and a housing that are connected via low helix angle threads. The make-up/break-out device is used with the hammer to tighten or loosen the connection between the drill bit assembly and the housing. The make-up/break-out device comprises a vise arm, a lever arm, and drive arm. The drive arm reacts torque on both the vise arm and the lever arm which in turn react torque on the drill bit assembly and the housing | 05-15-2014 |
20140294512 | Powered Slip Actuation - A system for pushing and pulling rod strings through the ground or an underground pipe. The apparatus has a downhole tool attached to the distal end of the rod string. The push/pull machine has a stationary frame that is placed against the ground to provide a reaction surface. The stationary frame has an opening for the rod string to pass through. A rod gripping assembly is supported on the machine frame and moveable relative to the stationary frame. The rod gripping assembly has a slip bowl, jaws, a thrust member and an actuator. The actuator powers movement of the jaws into the slop bowl to cause a powered gripping of the rod string by the machine. With the rod string gripped a cylinder assembly is activated to push the rod gripping assembly toward the stationary frame thereby pushing the rod string into the ground. | 10-02-2014 |
20150014060 | Tricone Bit Construction - A roller cone drill bit having detachable rotatable arms. The arms are connected at a mounting pad to the bit body. Each arm has its own grease delivery system to provide lubrication to the interface between the arms and rolling elements at an end of each arm. The forward-facing contact surface between the bit body and the arms is at an angle, relative to the central axis of the bit, that is ninety degrees or more. | 01-15-2015 |
20150098765 | Pipe Slitter - A pipe expander assembly for replacing an existing pipe with a new pipe. The expander assembly has a slitter disposed about a wire rope and abutting an expander at a spherical joint. The expander comprises a cone to expand a slit pipe and is internally connected to the wire rope by jaws that expand and contract about the wire rope due to threading of a jam nut into the cone. A pipe puller is connected to the back of the expander at a clevis and is adapted for connection to a new pipe, either through a jaw system, an adaptor, or fusion to the pipe. | 04-09-2015 |
20150198279 | Pipe Slitting Apparatus - An apparatus for replacing an existing pipe. The apparatus comprises a slitter and expander which surround a wire rope. The wire rope is attached to the expander, and the expander abuts either the slitter or a separation tube disposed between the expander and slitter, such that the slitter and expander are pivotable relative to each other. The apparatus is placed in a pipe to be replaced and pulled. While being pulled, blades on the slitter slit the pipe, while a sloped surface of the expander moves the slit sections apart into surrounding soil. A replacement pipe may be pulled by a pipe putter attached to the expander. A beacon may also be disposed within the apparatus to emit a signal for locating the apparatus white underground. | 07-16-2015 |
Patent application number | Description | Published |
20100115428 | SYSTEM AND METHOD FOR WEB BROWSING - A system and method for web browsing contemporaneously displays multiple web pages, advertisements, or other applications, preferably within a single window, for a user to view. In a preferred embodiment, a current web page, a past web page, a future web page, and/or an advertisement or other application are contemporaneously displayed in a single window. In this embodiment, the present invention tracks a past web page and renders it in a first panel, renders the current web page in a second panel, and identifies a hyperlink in the current web page to retrieve and render the future web page in a third panel. In other embodiments, a host provides a list of web pages that are to be displayed in the panels. In other embodiments, a user selects a list of web pages that are to be displayed in the panels. In other embodiments, hyperlinks are filtered and/or prioritized to determine which web pages are to be displayed in the panels. In this manner, the user contemporaneously views the current web page, the past page, and the future web page, or alternately, multiple web pages in the single window. Preferably, the present invention is implemented as a web browsing room in a three-dimensional space where walls of the rooms correspond to various ones of the aforementioned panels and a floor of which may be used to display advertisements or provide other applications. The user can view the web pages in the browsing room using various three-dimensional navigation techniques. | 05-06-2010 |