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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 |
| 4351292 | Poppet valve shield A thermal barrier (10) fixed to a valve head (12) of a diesel engine poppet valve (14) is disclosed. The barrier includes a thin sheet metal cap 18 having a concave shield portion 18a, an annular fold or corrugation (18b) circumscribing the shield portion... | 09/28/1982 |
| 4300492 | Thermal barrier valve A thermal barrier for a diesel engine poppet valve is disclosed. The barrier includes a cup-shaped member having a shield portion spaced from the valve face and a cylindrical skirt portion welded to the valve head. The shield, skirt, and valve face define... | 11/17/1981 |
| 4190941 | Method of making cooled valves for internal combustion engines and valves obtained thereby The invention relates to a method of manufacturing cooled valves for internal combustion engines. From a first cylindrical billet is formed a valve blank by drilling an axial blind bore therein and machining an inner circumferential groove at the blind en... | 03/04/1980 |
| 4187807 | Cooled engine valve with improved heat transfer An engine valve comprises an elongated stem having a head secured on an end thereof. A tube is disposed in the stem to terminate at an outlet to communicate a liquid coolant, such as oil, to an annular chamber defined in the head. An agitator ring is loos... | 02/12/1980 |
| 4006592 | Valve arrangements for reciprocating piston machines A valve arrangement for controlling the flow of fluid from an inlet passage to the cylinder of a reciprocating piston compressor wherein the valve is actuated to the open position by the pressure of the fluid compressed in the cylinder by planned early cl... | 02/08/1977 |
