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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 |
| 6994916 | Friction stir grain refinement of structural members The present invention provides an improved structural assembly constructed of a plurality of structural members secured together. At least one of the plurality of structural members defines a first region characterized by comparatively high operational stress and a ... | 02/07/2006 |
| 6398883 | Friction stir grain refinement of structural members The present invention provides an improved structural assembly constructed of a plurality of structural members secured together. At least one of the plurality of structural members defines a first region characterized by comparatively high operational st... | 06/04/2002 |
| 4877463 | Method for producing rolled steel products, particularly threaded steel tension members To produce threaded steel tension members, steel is used with a C-content of 0.50 to 0.80%, preferably 0.75%, a Si-content of 0.20 to 0.50%, preferably 0.25%, and a Mn content of 0.30 to 0.80%, preferably 0.60%. Exiting from the rolling heat at the outlet... | 10/31/1989 |
| 4560424 | Process for forming a prestress anchorage by drawing a steel sleeve over a metal core A process for forming a prestressed anchorage by drawing a steel sleeve over a metal core of elongate shape having a substantially round section, consisting in using a sleeve having an inner diameter substantially equal to the outer diameter of the metal ... | 12/24/1985 |
| 4540447 | Method of making a multigrip fastener and fastener made thereby This disclosure relates to swage type fasteners including a pin having a plurality of combination locking and breakneck grooves and a collar adapted to be swaged into the grooves with one of the grooves acting as a breakneck whereby the excess length of p... | 09/10/1985 |
| 4233880 | Stainless steel drill screw A drilling and tapping screw constructed from a 300 series stainless steel material which has the corrosive resistance of the high chromium high nickel content stainless steel while still being capable of drilling through carbon steel materials or the lik... | 11/18/1980 |
| 4112812 | Heat-treated article An article is hardened or tempered in a localized zone. Where the article is a thread-forming device the zone is that part of its thread that does the thread-forming in the workpiece. The hardness of the remainder of the body of the article is left unchan... | 09/12/1978 |
| 4021274 | Method for heat treating by induced current Steel workpieces, such as thread-forming screws and bolts, tapping tools, and the like, are hardened in localized areas to controlled depths of hardening by utilizing loose electromagnetic coupling between the workpiece and the induction coil. The loose c... | 05/03/1977 |
