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| Number | Title | Issue Date |
| 5165348 | Conveyor having self-propelled carriers and track with pivotal ratchet pawl teeth to ensure smooth transition between friction drive and pinion drive A conveyor comprising a plurality of self-propelled carriers adapted to run along a rail, which is provided with a rack disposed at a gradient portion thereof and having a plurality of downward teeth. Each of the carriers has a gear meshable with the rack... | 11/24/1992 |
| 4570542 | Ribbon rail systems An elongate deformable ribbon drive rail for carrying a working apparatus having a toothed drive gear and support mechanism is provided in the form of a first narrow elongate strip of metal of width to carry the support mechanism, a second narrower strip ... | 02/18/1986 |
| 4512706 | Shear dolly for long wall mining In the long wall mining of coal, a sectional pan-line is positioned along the working face of the coal seam parallel with the working face. The pan-line sections joined together have parallel rails along which the mining machine travels. At least one of s... | 04/23/1985 |
| 4353308 | Cog wheel railway Cog wheel vehicle system. A single track consists of a square beam having a pair of flanges. There is a row of holes in each flange. A vehicle rides on the track and has a cog wheel engaging the holes in the flange. A directional hydraulic motor is connec... | 10/12/1982 |
| 4266484 | Rack-rail assembly for a mining machine A rack-rail assembly for a mining machine has a pair of relatively long rail sections longitudinally generally aligned with each other and having respective forked ends juxtaposed at a joint location. A relatively short link at this joint location has at ... | 05/12/1981 |
| 4245561 | Controllable distributing conveying systems A controllable distributing conveying system for transporting people or goods is provided with stations which are arranged on a passive rail network and which include container loading-on positions, container off-loading positions, and container depots. S... | 01/20/1981 |
| 4241664 | Formable drive rails An elongate formable drive rail for carrying a working apparatus having a toothed drive gear and support elements is provided in the form of a narrow elongate strip of metal having a regular series of corrugations extending lengthwise of the strip interme... | 12/30/1980 |
