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An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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| Number | Title | Issue Date |
| 5553925 | Apparatus for automatically adjusting the cutting horizon of a mining extraction apparatus According to the invention, automatic adjustment of the cutting horizon of a cutter installation or other mining installation is effected with the aid of recognition sensors which detect the footwall rock interface and which are disposed distributed over ... | 09/10/1996 |
| 4776637 | Cutting machines and method of controlling the cutting horizon A cutting machine including a base, a cutter movably mounted on the base, and a drive for moving the cutter reciprocably along the base to carry out a cutting operation. The cutter height relative to the base is alterable by a ram and the base includes a ... | 10/11/1988 |
| 4571004 | Mechanism for controlling the elevation of a coal planer To be able to minimize the size of the lifting cylinder, a control lever is braced against an abutment at the waste side, and hinged on its other end to the piston rod of the lifting cylinder, thereby forming a movable hinge axis. Consequently, in a norma... | 02/18/1986 |
| 4492410 | Apparatus for controlling the position of a mineral mining machine Apparatus for controlling the position of a mineral mining machine, such as a plow, guided for movement along a guide, employs inclined piston and cylinder units connected between connectors at the ends of elongate beams or rods guided on support units an... | 01/08/1985 |
| 4458951 | Apparatus for controlling the position of a mineral mining machine Apparatus for controlling the position of a mineral winning machine, such as a plough, movable along a guide at the mineral face side of a scraper-chain conveyor employs a connector bracket at the goaf side of the conveyor to which a floor-engaging skid p... | 07/10/1984 |
| 4366989 | Coal planer control device A coal planer control device for a coal planer connected to a longwall conveyor having a waste side comprising, a bracket connected to the conveyor, a skid rest pivotally mounted to the bracket for pivotal movement against a mine floor to raise the bracke... | 01/04/1983 |
| 4280734 | Arrangement for controlled engagement of the tools of a mining machine with a mine face An arrangement for controlled engagement of the tools of a coal planer, with a mine face comprises a scraper conveyor, provided on its front face directed toward the mine face with a guide rail guiding the coal planer for reciprocation along the mine face... | 07/28/1981 |
| 4200338 | Mineral mining installation A mineral mining installation comprises a conveyor, a guide arranged on the face side of the conveyor, a roof support assembly arranged on the goaf side of the conveyor, and apparatus for controlling the cutting horizon of a plough movable along the guide... | 04/29/1980 |
| 4176884 | Anchoring apparatus for a mining installation Apparatus for anchoring a mining installation to the floor of a mine working includes an anchor beam and means for anchoring the anchor beam. A trolley is mounted on the anchor beam for longitudinal movement relative thereto. A guide skid is pivotally con... | 12/04/1979 |
