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 |
| 7090034 | Reamer having toroidal crusher body and method of use The present invention provides a reamer (100) having at least one journal body (110) and at least one toroidal cutter body (116). The toroidal cutter body (116) has a maximum diameter (MD), an outer perimeter (OP) and a plurality of cutti... | 08/15/2006 |
| 4907664 | Rock cutting tool A drilling member for use in a drilling system, such as for drilling a large diameter subterranean hole or for removing rock at the earth's surface, in which the system employs a cutting head rotated about an axis and mounted for movement into a rock face... | 03/13/1990 |
| 4762188 | Drill bit A drill bit for use with a reciprocating device, wherein the bit is in the form of a rotatable corrugated frusto-conical roller, supported by a U-shaped member, attached to a mounting post. The corrugations are the cutting edges of the bit.... | 08/09/1988 |
| 4596295 | Roller cutter with a tilted journal The present invention relates to a roller cutter to be mounted on a rock boring head via a journal and a saddle. The journal has two ends that are supposed to be fixed to a conventional saddle. The journal is surrounded by a rotatably carried roller body ... | 06/24/1986 |
| 4552232 | Drill-bit with full offset cutter bodies A rotary drag drill bit is seen wherein cutter bodies are rotatively connected to a main body structure at a fully offset position. The fully offset position is defined by a rotational axis of each cutter body, a longitudinal axis of the drill bit and end... | 11/12/1985 |
| 4241799 | Protected cutter mounting for drill bits A large diameter earth boring drill bit has a cutter mounting system that protects the cutter mounts from formation damage. The drill bit is of the type having a cutter support plate adapted to be secured to a string of drill pipe. A cutter shell is rotat... | 12/30/1980 |
| 4228863 | Reamer bit for raise boring A reamer bit for raise boring in rock, of the type comprising a body on which a number of rolling cutters with cutting inserts are rotatably mounted for contact with and disintegration of the rock, and a detachable stem mounted in a central bore on the bo... | 10/21/1980 |
| 4202418 | Roller cutter mounts Roller cutters are mounted onto a cutterhead from the rear side of the cutterhead. A load transfer block is insertable between a stator portion of each cutter and a generally forwardly directed load-carrying surface on the cutter-head frame. Loads imposed... | 05/13/1980 |
| 4089382 | Cutter mounting for a large hole earth boring bit A large hole earth boring bit with a clevis-type coupling for mounting the rolling cutters to the bit. The mounting apparatus includes a first member having two ends with aligned holes and a second member having its end inserted between the two ends. The ... | 05/16/1978 |
| 3981370 | Disc cutting unit for use on rock boring machines A rock-boring machine of the type comprising a rotatable headplate having a plurality of disc cutting units mounted on the front face of the headplate. Each disc cutting unit includes an annular rotatable body having a continuous recess extending around i... | 09/21/1976 |
| 3967854 | Endless bucket type excavator Each bucket includes a ground engaging leading portion characterized by roller cutter means alternating with scoop teeth transversely across the bucket. The scoop teeth on alternate buckets follow the path of roller cutter means on intermediate buckets. T... | 07/06/1976 |
