Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7207759 | Fastener for panels or the like A fastener comprises a pin and a bushing having a hollow shank that is inserted into holes in a plurality of members being attached. A pin shank is inserted into the bushing shank to effect a widened-diameter coupling condition in which the diameter of the bushing s... | 04/24/2007 |
| 7014408 | Method and apparatus for fastening steel framing with self-locking nails A harpoon nail having two or more sets of teeth on opposite sides of fingers that deform while penetrating the framing members. The teeth engage with a bottom surface to fasten the framing members together. A piercing nail having sets of teeth on two edges penetrate... | 03/21/2006 |
| 4969778 | Expansion assembly for mine roof bolts utilized in small diameter bore holes An improved expansion assembly for a mine roof bolt for use in a nominal one inch diameter bore hole with a nominal 5/8" diameter roof bolt is provided. The expansion assembly has a tapered plug with four tapered surfaces, an expansion shell that has four... | 11/13/1990 |
| 4904123 | Expansion assembly for mine roof bolts utilized in small diameter bore holes An improved expansion assembly for a mine roof bolt for use in a nominal one inch diameter bore hole with a nominal 5/8" diameter roof bolt is provided. The expansion assembly has a tapered plug with four tapered surfaces, an expansion shell that has four... | 02/27/1990 |
| 4626139 | Roof bolt anchor A mine roof bolt expansion anchor utilizes a plurality of transversely bent elongated leaves which are compressed within a bail by the rotation of the roof bolt. The compression results in movement of the leaves toward a flattened position whereby the out... | 12/02/1986 |
| 4556344 | Combination expansion shell and resin secured mine roof anchor assembly A combination expansion shell and resin secured mine roof anchor assembly comprising an elongated bolt which carries rebar and an expansion shell. The assembly is inserted into a mine roof opening, in the back end of which is positioned a resin and cataly... | 12/03/1985 |
| 4534680 | Combination expansion shell and resin secured mine roof anchor assembly A combination expansion shell and resin secured anchor assembly for installation in a mine roof opening including an elongated bolt having rebar attached to the upper end thereof and an expansion shell below the rebar. The assembly is inserted into a mine... | 08/13/1985 |
| 4516886 | Combined resin-mechanical mine roof support anchor A mine roof mechanical anchor having the usual expansion shell and tapered nut is fitted with a bail having legs secured to the shell and a medial portion extending over and contacting the nut, maintaining the latter in assembled relation with the shell, ... | 05/14/1985 |
| 4475856 | Expansion screw with an expansion sleeve having an outer cylindrical surface and regions of greater and lesser wall thickness An expansion screw for being secured in a cavity is threaded at the outer end of its screw portion for co-action with a nut (2) and is provided with an expandable sleeve (10) about its opposite end. The sleeve has an inner profile coacting with an outer p... | 10/09/1984 |
| 4437795 | Mine roof anchor assembly A mine roof anchor assembly comprising an elongated bolt, one end of which is threadedly engaged with an expansion anchor. The expansion anchor includes a cone nut threaded on the bolt which moves axially through a shell for expanding the latter into grip... | 03/20/1984 |
| 4403894 | Rock bolt expansion anchor having windened expansion range An expansion anchor including an expansible shell and tapered nut for insertion into a drill hole in a rock formation and adapted for outward expansion of the shell into gripping engagement with the drill hole wall to support a rock bolt and bearing plate... | 09/13/1983 |
| 4278006 | Expansion shell assembly An expansion anchor for a mine roof support bolt having a one-piece shell, a tapered nut and a strap for maintaining the shell and nut in assembled relation. The shell includes a circular collar having four fingers extending therefrom in a generally cylin... | 07/14/1981 |
| 4187757 | Arrangement for mounting an object to a support structure An arrangement for mounting an object to a support structure having a rear side which is difficult of access, has an anchoring element including a base portion and a plurality of leg portions extending from the base portion, and a mounting element arrange... | 02/12/1980 |
| 4188158 | Mine roof bolt hole seal A mine roof bolt hole seal characterized by an arrangement of components which seal the bolt hole from the mine atmosphere at the time the roof bolt is installed and which, thereafter, provides for the removal of moisture and excess oxygen from within the... | 02/12/1980 |
| 4100748 | Mine roof or rock bolt expansion anchor of the bail type A bail type expansion anchor for mine roofs and the like including a threaded bolt, and expander cone nut, and an expansible shell assembled together, with the shell formed from an integral blank of sheet metal having a pair of initially flat rectangular ... | 07/18/1978 |
