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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 |
| 7731298 | Shearer-loader drive subassembly and guide shoe for it A shearer-loader drive subassembly having a rotatably mounted drive sprocket, a transmission gear connected to the sprocket in a rotationally fixed manner, at least one releasable guide shoe provided for guiding the shearer loader on a rack arrangement, and a housin... | 06/08/2010 |
| 7191872 | Fork height adjustment mechanism A material handling vehicle including a truck body and a fork assembly adjacent the truck body. A link arm extending between the truck body and the fork assembly has a proximal end and a distal end. A first pivot pin is fixed to the body and pivotally links the prox... | 03/20/2007 |
| 7097256 | Mining machine with releasable guide piece and the guide piece for it A mining machine for underground mining is disclosed, particularly an extraction or coal plough. When in use, the mining machine is guided along a machine guide, said machine guide including a guide rail and a guide pawl. The guide pawl engaging around said guide ra... | 08/29/2006 |
| 4934757 | Control of mineral mining machines A coal wining plough in a longwall working employs adjustable floor cutters mounted on curved carriers displaced in guideways on the body of the plough. Wedges abut on the upper ends of the carriers and are moved by hydraulic piston and cylinder units to ... | 06/19/1990 |
| 4548444 | Mineral winning plough A plough for winning material (such as coal) from a face has a plough body which supports a carrier for roof-level cutters. Means are provided for adjusting the vertical position of the carrier with respect to the plough body. The adjustment means compris... | 10/22/1985 |
| 4505518 | Mineral winning machines A mineral winning machine in the form of a coal plough has adjustable floor cutters. To set the floor cutters at different heights use is made of arcuate levers as carriers for the floor cutters which are slidably guided as known per se. Eccentric stop me... | 03/19/1985 |
| 4403809 | Mineral winning plough A mineral winning plough, such as a coal plough, has a plough body adapted to be moved to and fro alongside a mineral face on a plough guide. The plough body is provided with a pair of vertically-adjustable carriers, each of which is provided with floor c... | 09/13/1983 |
| 4280733 | Asymmetric mineral mining plough A mineral mining plough for use in asymmetric ploughing, and movable to and fro alongside a conveyor, has a plough body provided with cutter means at its two ends. A first cutter means is arranged to win material when the plough is on the uphill run (that... | 07/28/1981 |
| 4239290 | Hydromechanical planer with cutting and breaking heads A hydromatic planer particularly for mining materials in a mining seam comprises a planer housing which advantageously has a cutting and breaking head on each end thereof, each of which includes a substantially identical construction. Each cutting head in... | 12/16/1980 |
| 4220371 | Method of mineral mining plough operation in two directions of varying depth cut A method of winning material in a mineral mining working utilizes a mineral mining plough which is movable to and fro alongside a conveyor. The plough is provided with first cutter means arranged to win material lying in a first height range, and second c... | 09/02/1980 |
| 4199194 | Control means for a coal plough A coal plough which is movable to and fro in a mine working alongside a coal face, has floor-level cutters mounted on a carrier. The carrier is pivotable in a vertical plane about a horizontal axis perpendicular to the coal face. The carrier is pivotable ... | 04/22/1980 |
| 4178040 | Movable mining planer with direction responsive adjustable cutter depth An apparatus for winning material in a mineral mining working utilizes a mineral mining plough which is movable to and fro alongside a conveyor. The plough is provided with first cutter means arranged to win material lying in a first height range, and sec... | 12/11/1979 |
| 4119347 | Coal plough having separately adjustable cutters and flexible fluid power and control lines therefor A coal plough has a main body guided for movement back and forth along a longwall coal face. The body supports various cutting tool carriers which are adjustable with the aid of hydraulic piston and cylinder units. Fluid is supplied to these units by mean... | 10/10/1978 |
| 4063781 | Apparatus for loading material Apparatus for loading material onto a conveyor in a mine working comprises two similar bodies interconnected through a short chain and supported for movement along a guide means at one side of the conveyor. Each body has a shaped base member engaging on t... | 12/20/1977 |
| 4035025 | Mineral winning ploughs A coal plough is composed of two spaced-apart interconnected bodies which engage on a guide and which are moved along the guide to strip coal from a coal face. Each body is provided with various sets of cutter bits located at both its end regions and a fl... | 07/12/1977 |
| 4025117 | Coal planer A coal planer for use in an underground mine gallery comprises a central unit, a pair of loading heads arranged spaced from and to opposite sides of the central unit and a pair of intermediate units respectively located between the central unit and the lo... | 05/24/1977 |
| 4013320 | Hook plough apparatus for longwall mining A hook plow apparatus for use in longwall mining and particularly adapted for use in conjunction with a fixed arch shield mining system having rails mounted along the length of the shield. The apparatus includes a power transmission frame mounted for move... | 03/22/1977 |
