Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7404924 | Flotation device A flotation device for mixing and aerating an ore-containing slurry, comprising a tank having a conical-shaped floor. A vertically positioned flotation assembly is located within the tank. The open bottom of the flotation assembly is shaped is positioned above the c... | 07/29/2008 |
| 4975182 | Waterflow differential electrical charging process for ores The invention consists of forming an aqueous slurry of water and particles of ore carrying both metals and/or minerals which are passed at relatively high speed along an electrically isolated path in contact with electrically insulating materials and in t... | 12/04/1990 |
| 4913407 | Precious metal recovery system A precious metal recovery system utilizing an amalgamation process which results in substantially complete recovery both of the precious metal sought and of the mercury utilized in the process. Mercury has undesirable health and environmental characterist... | 04/03/1990 |
| 4527778 | Apparatus for production of refractory metal from a chloride thereof An apparatus and method for production of refractory metal from a chloride thereof, comprising a conversion assembly and a purification assembly, the former in turn comprising: an elongated vertical cylindrical member with an open top and a closed bottom,... | 07/09/1985 |
| 4032122 | Method and apparatus for recovering small particles of heavy precious metals There is disclosed a method and apparatus for recovering small particles of gold or platinum from a slurry by feeding the slurry onto a layer of Mercury which is flowing downwardly along a generally conical, downwardly converging inner wall of a housing. ... | 06/28/1977 |
| 4019725 | Gas seal and silencer for use on tuyere body A gas seal and silencer is provided for attachment to a tuyere body to minimize the gas volume and pressure loss during the insertion of a punch bar through a tuyere valve closing the tuyere and so reduce the noise created by the blast of gas leaking out ... | 04/26/1977 |
| 4003557 | Device for the cementation of metals by liquid amalgams A cementation apparatus is provided wherein the reaction surface thereof can be increased without changing the outer dimensions. There is provided at least one inner cylinder which is freely mounted in an outer cylinder and placed one within the other. Th... | 01/18/1977 |
| 3998629 | Method for recovering small particles of heavy precious metals by amalgamation There is disclosed a method and apparatus for recovering small particles of gold or platinum from a slurry by feeding the slurry onto a layer of mercury which is flowing downwardly along a generally conical, downwardly converging inner wall of a housing. ... | 12/21/1976 |
| 3981490 | Apparatus for decomposing alkali metal amalgams An apparatus for the decomposition of the amalgams of alkali metals including a reaction body consisting of horizontally spaced layers of foraminous metals wettable by amalgam, e.g. steel grids, with alternately inserted layers of material unwettable by a... | 09/21/1976 |
