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 |
| 5713527 | Impact crusher with hydraulic adjustment of the crushing gap which determines the degree of communication The invention concerns an impact crusher 1 with a rotor 3 equipped with blow bars 4 and pivotably-mounted impact aprons 5, 6 arranged in the crusher housing 2, the impact aprons are positionable vis a vis the rotor by means of hydraulic cylinder-piston un... | 02/03/1998 |
| 5505393 | Crushing device especially for scrap metal A crushing device for crushing material such as scrap metal and refuse has a housing with a material feeding section and a material removal section for removing crushed material. A shaft with a rotor connected thereto is rotatably supported in the housing... | 04/09/1996 |
| 5492279 | Variable spring rate pulverizer apparatus A pulverizer for crushing coal for use in a combustion process includes a bowl shaped body, a roller dimensioned and configured for contact with at least a portion of the bowl shaped body, apparatus for causing relative movement between the bowl shaped bo... | 02/20/1996 |
| 5482218 | Rock crushing apparatus and method The invention provides an apparatus for crushing material such as rock and includes a support structure having an inlet and an outlet. A powered rotor shaft rotates with respect to the support structure about a shaft axis, and a rotor mounted eccentricall... | 01/09/1996 |
| 5398877 | Multi-disc refiner with free floating plate mechanism Apparatus for reducing particulate materials such as paper-making pulp, including a housing defining a working chamber having an inlet and an outlet for flow of particulate material therethrough. There is a rotary shaft supported in said housing, and roto... | 03/21/1995 |
| 5255869 | Impact crusher with biased tertiary curtain assembly An improved crusher with first, second and third curtain assemblies. Each curtain assembly mounts a series of crusher plates and the plates of its curtain assemblies are distributed circumferentially above a rotor in the crusher. The three curtain assembl... | 10/26/1993 |
