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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 |
| 7002117 | Heat-sealing device for packaging material Device for welding a moving packaging material (1) including a layer that can be heated by electromagnetic induction and a thermoplastic layer incorporating a welding zone (2) which lies in the direction of movement of the packaging material; the weldi... | 02/21/2006 |
| 6949728 | Impeder for manufacturing welded pipe An impeder, for manufacturing a welded pipe, including an insulating case 4 containing laminations 10 having coated steel sheets 8 formed by providing an insulating coating on untreated steel sheets having a thickness of 0.3 mm or less and an in... | 09/27/2005 |
| 4694134 | Apparatus for overheating edges of skelp for the production of compression welded pipe Apparatus for overheating the edges of a preheated formed skelp for the purpose of butt welding the skelp into pipe or tube. Induction coil assembly consisting of two (2) series connected loops, with a main conductor of each loop positioned within a magne... | 09/15/1987 |
| 4608471 | Impeder with aggregate ferromagnetic core An impeder for use in a mill for roll-forming tubing. The mill includes a feed station for supplying an elongated steel strip in flat form and a station where the strip is transversely bent from its planar condition causing the lateral edges of the strip ... | 08/26/1986 |
| 4596913 | Impeder for electric resistance tube welding An impeder for use in an apparatus for resistance tube welding by which a strip-shaped skelp continuously formed into a tubular or spirally tubular shape having spaced opposed edge portions defining a gap therebetween has the edge portions heated and pres... | 06/24/1986 |
| 4531035 | Exposed ferrite core impeder In an induction welding process for metal tubing, an impeder having a fiberglass sleeve and an exposed ferrite core is used to concentrate the flow of current along a seam to be welded. The sleeve at its upstream end is connected to a brass fitting which ... | 07/23/1985 |
| 4443677 | Induction welding impeder apparatus with fluid cooling A return-flow type impeder assembly useful in induction welding of small tubing wherein the impeder is movably disposed within an enclosure member so that the force of liquid coolant flowing through the assembly between the impeder and enclosure maintain ... | 04/17/1984 |
| 4314125 | Electric seam welding device in the production equipment of hot-dip metal-coated steel tubes This invention relates to the means of continuously seam-welding the areas to be joined together of steel strips formed like tubes in the production of hot-dip metal-coated steel tubes from steel strips in a continuous supply. This seam welding device is ... | 02/02/1982 |
| 4268736 | Induction welding apparatus for manufacture of tubing Induction welding apparatus for manufacture of tubing which includes a modifier between the induction coil and pressure rolls, an impeder inside the tube with laminations parallel to the radius of the tube which intersects the tube slit, a device for stab... | 05/19/1981 |
