Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7708087 | Countersink roof bit drill and method for using the same A roof bit drill has a central shaft with a front end and a back end. The drill also has a base secured about the central shaft proximate to the front end, wherein the base has clearance channels extending axially therethrough. At least one cutting element is arrang... | 05/04/2010 |
| 7566189 | Mine roof bolt with resin control surface A resin bonded mine roof bolt having an elongated rod with a first end, a second end, and a resin control surface positioned on the rod between the rod first and second ends. The resin control surface has a channel extending along the length of the bolt for distribu... | 07/28/2009 |
| 7562550 | Cable bulbing apparatus and method for forming bulbs in a cable bolt A cable bulbing apparatus having a frame (1) and securing means (3) for holding at least a portion of a cable bolt (4) with respect to the frame (1). The apparatus also includes a bulbing assembly (5) which is releasably engagable ... | 07/21/2009 |
| 7445408 | Yieldable prop having a restraint arrangement A yieldable prop having a hollow first conduit having a first end and an opposite second end, the first end having a conical-shaped interior surface, with interior diameter decreasing as distance from the second end of the first conduit decreases; a sec... | 11/04/2008 |
| 7390147 | Yieldable prop having a yield section A yieldable prop having a first end and a second end includes a first hollow conduit, a second conduit slidably received in the first hollow conduit, and a clamp assembly positioned adjacent the juncture of the first hollow conduit and the second conduit. A yield se... | 06/24/2008 |
| 7360971 | Yieldable prop A yieldable prop having a first end and a second end including a first hollow conduit, a second conduit slidably received in the first hollow conduit, a clamp assembly positioned adjacent to the first hollow conduit and the second conduit, and at least one handle co... | 04/22/2008 |
| 7334968 | Yieldable prop A yieldable prop having a first end and a second end including a first hollow conduit, a second conduit slidably received in the first hollow conduit, a clamp assembly positioned adjacent to the first hollow conduit and the second conduit, and at least one handle co... | 02/26/2008 |
| 7296950 | Point anchor coated mine roof bolt A resin bonded mine roof bolt having an elongated rod with a first end and a second end. A segmented resin compression layer covers a portion of the rod below the first end. When installed in a mine roof bore hole with curable resin, the resin compression layer mixe... | 11/20/2007 |
| 7284933 | Square embossed roof and rib plate Disclosed is a mine roof and rib support system generally including a square bearing plate. A through hole is positioned near a center portion of the square bearing plate. A peripheral section at least partially circumscribes the bearing plate. In between the throug... | 10/23/2007 |
| 7261494 | Truss shoe A truss shoe for a roof support system includes a base member having a bearing surface and, optionally, an end having a sweeping radius for ease of moving the truss shoe into an installation position, a bolt receiving section having a bore hole, a cable engaging sec... | 08/28/2007 |
| 7134810 | Yieldable prop having a yield section A yieldable prop having a first end and a second end includes a first hollow conduit, a second conduit slidably received in the first hollow conduit, and a clamp assembly positioned adjacent the juncture of the first hollow conduit and the second conduit. A yield se... | 11/14/2006 |
| 7114888 | Yieldable prop A yieldable prop having a first end and a second end including a first hollow conduit, a second conduit slidably received in the first hollow conduit, a clamp assembly positioned adjacent to the first hollow conduit and the second conduit, a ring positioned around t... | 10/03/2006 |
| 7073982 | Point anchor coated mine roof bolt A resin bonded mine roof bolt having an elongated rod with a drive head at one end and an expansion anchor threaded onto the other end. A segmented resin compression layer covers a portion of the rod below the expansion anchor. When installed in a mine roof bore hol... | 07/11/2006 |
| 6832165 | Method of roof instability rating A method for predicting potential mine roof failures which generally includes the steps of identifying influence factors that affect mine roof instability, quantifying each influence factor, multiplying each influence factor by a numeric weight factor to obtain a we... | 12/14/2004 |
| 6619888 | Flange nut for mine roof bolt A method and apparatus for making a nut having a first end, a second end, and defining an orifice extending between the first end and the second end. A plurality of first threads are positioned in the orifice defined by the nut body, and a malformed threa... | 09/16/2003 |
| 6612783 | Cable bolt with mixing delay device A mixing delay device for use with tensionable cable bolts wherein the mixing delay device compresses or is uncompressed in response to a compression force applied to the mixing delay device, wherein the mixing delay device increases resin mixing time, pr... | 09/02/2003 |
| 6599059 | Three-prong shell An expansion assembly configured to be attached to a mine roof bolt, wherein the expansion assembly may include a plug defining an interior cavity and an outer surface and an expansion shell having a plurality of spaced-apart prongs, preferably three pron... | 07/29/2003 |
| 6527482 | Grit surface cable products A mine roof bolt, preferably one inch or less in diameter, having an external coating configured with particles which mix resin as the mine roof bolt is rotated in a mine roof bore hole.... | 03/04/2003 |
| 6322290 | Cable bolt head A mine roof bolt includes a flexible multi-strand cable having a first and second end with a drive head formed on the first head, the drive head having a plurality of driving faces on an exterior surface thereof. A load bearing barrel and wedge assembly i... | 11/27/2001 |
| 6283451 | Hydraulic tensioner for mine roof support cables A hydraulic cable tensioning device having a main body and tensioning yoke formed from aluminum and being capable of delivering 5,000 psi to tension a cable bearing a barrel and wedge assembly such as in a mine roof bolt or a cable truss. The body defines... | 09/04/2001 |
| 6270290 | Tensionable cable bolt A tensionable mine roof cable bolt having a resin grouted upper portion and a mechanical anchor. The cable bolt is rotated during installation in a mine roof bore hole to mix resin and engage the mechanical anchor with the rock. A drivehead press fitted o... | 08/07/2001 |
| 6146056 | Channel and bearing plate assembly A double ribbed bearing plate for use with a channel member in supporting a mine roof. The bearing plate includes a base with ribs in the bearing plate define recesses which receive flanges on the channel. The longitudinal edges of the bearing plate may e... | 11/14/2000 |
| 6074134 | Tensionable cable bolt A tensionable mine roof cable bolt having a resin grouted upper portion and a mechanically anchored lower portion. The lower portion includes a shaft which is swaged to the cable and accepts a mechanical anchor. The cable bolt is rotated during installati... | 06/13/2000 |
| 6056482 | Cable bolt head A plurality of designs for mine roof bolts is disclosed. Each mine roof bolt includes a flexible multi-strand cable having a first and second end with a drive head formed on the first end, the drive head having a plurality of driving faces on an exterior ... | 05/02/2000 |
| 6030151 | Method for reinforcing rock with a tendon A method is disclosed for inserting a tendon (52) into a bore (4) for the purpose of reinforcing rock (6) in which the bore (4) has been drilled. The method enables the tendon (52) to be inserted into the bore while being rotated at the same time to facil... | 02/29/2000 |
| 5967703 | Mine roof support system The present invention relates to a cable truss system for supporting a mine roof. The system includes at least one cable bolt secured in at least a pair of spaced boreholes. A leading end of each cable bolt is secured within the borehole and the trailing ... | 10/19/1999 |
| 5957627 | Pillar cable truss system A pillar cable truss system including a support cable extending between a pair of splice tubes mounted onto a geological formation such as a pillar in a coal mine with a pair of rock anchors. The splice tubes may be attached to two support cables such tha... | 09/28/1999 |
| 5954455 | Combination bolt system A tensionable combination mine roof bolt is disclosed for use in resin grouted applications. The mine roof bolt includes a lower rod member having a rotatable bolt head at a first end thereof supporting a bearing plate and a threaded second end spaced fro... | 09/21/1999 |
| 5919006 | Tensionable cable bolt with mixing assembly A tensionable mine roof cable bolt having a resin grouted upper portion and a mechanically anchored lower portion. The lower portion includes a shaft which is swaged to the cable and accepts a mechanical anchor. The cable bolt is rotated during installati... | 07/06/1999 |
| 5851481 | Rebar with vanadium alloy A steel alloy having 0.44-0.52 wt. % C, 1.1-1.6 wt. % Mn, 0.15-0.35 wt. % Si, a maximum of 0.04 wt. % P, a maximum of 0.05 wt. % S, a maximum of 0.45 wt. % Cu and 0.06-0.09 wt. % V. A No. 5 mine roof bolt formed from the steel alloy has a minimum yield st... | 12/22/1998 |
| 5836720 | Mine roof support system The present invention relates to a cable truss system for supporting a mine roof. The system includes at least one cable bolt secured in at least a pair of spaced boreholes. A leading end of each cable bolt is secured within the borehole and the trailing ... | 11/17/1998 |
| 5829922 | Cable bolt head A plurality of designs for mine roof bolts is disclosed. Each mine roof bolt includes a flexible multi-strand cable having a first and second end with a drivehead formed on the first end, the drivehead having a plurality of driving faces on an exterior su... | 11/03/1998 |
| 5824912 | Method of roof control in an underground mine Stresses in an underground mine are determined by analyzing mechanical properties of mine site stratum including Young's modulus. The mechanical properties are combined with the physical layout of the mine. From the application of the mechanical propertie... | 10/20/1998 |
| 5785463 | Combination cable bolt system A tensionable combination cable mine roof bolt is disclosed for use in resin grouted applications. The mine roof bolt includes a rod member having a rotatable bolt head at a first end thereof supporting a bearing plate and a threaded second end spaced fro... | 07/28/1998 |
| 5769570 | Cable tensioning dome plate A mine roof bearing plate having a planar member having a topside, an underside and an elastically deformable domed portion extended downwardly from the underside. A central section at the outer extremity of the domed section defines a bolt hole. The oute... | 06/23/1998 |
| 5762451 | Multi-piece, split bail expansion anchor A mine roof bolt expansion anchor is formed from a plurality of identical shell segments. Each shell segment has a first end, a second end, and an end section at the first end. A first finger extends from the end section to the second end of the shell seg... | 06/09/1998 |
| 5741092 | Cable bolt driver A cable mine roof bolt driver is disclosed for rotating a cable mine roof bolt in resin grouted applications. The bolt driver includes a body having a front face and a rear face. A cable receiving bore is positioned within the body extending into the body... | 04/21/1998 |
| 5699572 | Combination cable spreader and cable driver The present invention provides a cable driving wrench assembly for thrusting and rotating a multi-strand cable mine rock anchor. The wrench assembly includes a wrench body having an open interior and a plurality of apertures in the wrench body extending i... | 12/23/1997 |
| 5556234 | Mine roof bolt assembly A mine roof bolt assembly and a method for installing the bolt assembly. The bolt assembly includes a tensionable roof bolt, a bearing plate with an annular embossment, and a deformable annular washer.... | 09/17/1996 |
| 5542788 | Method and apparatus for monitoring mine roof support systems In a longwall mining operation, a panel to be extracted is formed in a seam of mine material by longitudinally extending headgate and tailgate entries with the panel beginning in a set-up room and ending at a termination line in a recovery room. The recov... | 08/06/1996 |
