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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 |
| 6863744 | Iron based alloy material for thixocasting process and method for casting the same An iron based alloy material for a thixocasting process and a method for casting the material which extends the service life of dies by inhibiting solidification contraction, and in which casting defects such as size variations and cracks can be inhibited. The mater... | 03/08/2005 |
| 6013141 | Cast iron indefinite chill roll produced by the addition of niobium An indefinite chill roll alloy composition is disclosed containing carbon ranging from 2.5 to 4.0% by weight of the alloy and the carbon is present as free graphite in an amount ranging from 2-7%, preferably 3-6%, of the total carbon. The composition furt... | 01/11/2000 |
| 5855698 | Engine cylinder block cast with component zones having different material properties An iron casting, such as a cylinder block for an internal combustion engine, includes a number of component zones, with each of the zones having selected surface to volume ratio and selected section thickness sufficient to cause in-mold cooling during the... | 01/05/1999 |
| 5837069 | Cast iron components and method of making A cast iron component, eg a camshaft, has a wear-resistant layer formed on at least one surface portion thereof, said layer being rich in primary carbides. The cast iron surrounding the carbides and in the remainder of the component has a structure which ... | 11/17/1998 |
| 5542990 | Camshaft A camshaft made of cast iron containing at least one element selected from the group consisting of Bi, Te, Se, As, Sb and Sn in a total amount of 0.0001 to 0.1 weight %, preferably, 0.001 to 0.1 weight %. The cast iron may further contain at least one ele... | 08/06/1996 |
| 5529641 | Cast iron slide member A cast iron slide member is formed from cast iron comprising 3.0% to 3.6% by weight of carbon (C), 1.6% to 2.4% by weight of silicon (Si), 0.2% to 1.5% by weight of manganese (Mn), 0.5% to 1.5% by weight of chromium (Cr), 1.5% to 3.0% by weight of nickel ... | 06/25/1996 |
| 5041173 | Lapping tools Spherical graphite cast iron utilized to prepare a lapping tool is manufactured by casting a molten composition into a mold cavity, and by chilling one side of the resulting casting thereby causing unidirectional solidification, the one side being used as... | 08/20/1991 |
| 4867803 | Lapping tools and method of manufacturing the same Spherical graphite cast iron utilized to prepare a lapping tool is manufactured by casting a molten composition into a mold cavity, and by chilling one side of the resulting casting thereby causing unidirectional solidification, the one side being used as... | 09/19/1989 |
| 4832084 | Dual graphite structured pipe This invention relates to a heavy wall monolithic iron pipe comprising nodular graphite in the outer portion of its wall and flake or quasi-flake graphite in the inner portion of its wall and a method for making said pipe. The central portion of the wall ... | 05/23/1989 |
| 4448610 | Centrifugally cast tube of spheroidal graphite cast-iron and its method of manufacture The cast tube (T) is subjected internally in a chill-mould (1) to the uniform spraying of water from 1000° C. approximately to 350° C. approximately. Then it is extracted from the chill-mould and in a furnace is subjected to isothermal bainitization mai... | 05/15/1984 |
| 4411713 | Shell for a composite roll In the manufacturing of a shell for a cast iron rolling mill roll, heating the chill prior to casting so that the chill at the time pouring commences is in the approximate range of 300° to 600° F. in order to decrease the cooling rate of the metal after... | 10/25/1983 |
| 4382828 | Chromium cast iron and method of producing same White, chromium cast iron having shock and impact resistance which comprise iron together with: are disclosed. The casting are produced by casting the molten alloy in a metallic permanent mold, removing the solidified casting from the mold at a temperatur... | 05/10/1983 |
| 4153477 | Friction stressed machine parts of cast iron with ledeburitic bearing surface and methods for their production A friction stressed machine part of cast iron with a ledeburitic-containing bearing surface contains 0.1 to 10 area percent of predominantly nodular-shaped graphite in the ledeburitic-containing bearing surface. A number of methods for producing such a ma... | 05/08/1979 |
| 4125399 | Apex seals for rotary piston engines Apex seal for rotary piston engines made of an iron-based material containing in weight 2.5 to 4.0% of C, 0.5 to 2.8% of Si, less than 1.0% of Mn, 0.25 to 2.0% of Ni, 0.25 to 2.0% of Mo, 0.25 to 2.0% of Cu, 0.15 to 0.4% of B, 0.15 to 1.5% of Cr, 0.1 - 0.4... | 11/14/1978 |
| 4032334 | Tappet metallurgy An engine tappet has a specific composition of alloyed heat treated chilled iron to maintain the highest amount of carbides after thermal treatment to harden the matrix.... | 06/28/1977 |
| 3997370 | Method of hot reducing ferrous and ferrous alloy products with composite martensitic nodular cast chill iron rolls This invention is directed to a method of hot reducing ferrous and ferrous alloy products, such as plates, strip, bars and rods, where such products are heated to temperatures in excess of 1900° F and subsequently reduced at temperatures within the range... | 12/14/1976 |
