Bizarre Patents
Pillow with retractable umbrella
A pillow assembly having a supporting assembly and a retractable umbrella assembly that is easily transportable and allows a user to support his/her head while covering their face from sunlight.
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| Number | Title | Issue Date |
| 5464324 | Variable-pitch propeller or fan A variable-pitch propeller or fan comprises a hollow boss, a number of propeller blades fitted rotatably on the boss, and also an adjusting element which is axially slidable in the boss and has a number of grooves running essentially at right angles to th... | 11/07/1995 |
| 5096383 | Propeller blades A propeller for an aircraft or fan comprises an even number of propeller blades, at least six in number, which are unsymmetrically arranged around the axis of roation of the propeller in two circumferentially equidistantly spaced groups of at least three ... | 03/17/1992 |
| 5090869 | Variable pitch propeller module for an aero gas turbine engine powerplant A variable pitch propeller module includes first and second multi-bladed propellers arranged to be driven in opposite rotational directions by a reduction gear mechanism, via shafts. First and second drums are rotatably mounted on the hubs of the first an... | 02/25/1992 |
| 5066195 | Propeller for aircraft or the like A propeller for an aircraft or a blower or fan, wherein the propeller blades are intended for operation at speeds characterized by blade tip Mach numbers in the range of about 0.4 to 0.8, comprises at least two pairs of diametrically opposed blades, the b... | 11/19/1991 |
| 4927329 | Aircraft engine unducted fan blade pitch control system An electric motor driven blade pitch varying system for the fan blades of an unducted fan type aircraft gas turbine engine utilizes permanent magnet alternating current motors located in the oil sump region of the engine. An alternator driven by the engin... | 05/22/1990 |
| 4842484 | Blade gearing and pitch changing mechanisms for coaxial counterrotating propellers A lightweight counterrotatable propeller system driven by a rotatable shaft is disclosed. The system includes first and second counterrotatable propellers, each propeller including a plurality of blades mounted on first and second hubs, respectively. Each... | 06/27/1989 |
| 4772181 | Bladed rotor assembly and a control system therefor A counterrotatable bladed rotor assembly drivable by a rotatable shaft comprises a leading propeller, a trailing propeller, and a gearbox located axially between the two propellers and enclosed by a non-rotatable casing having an end for attachment to a s... | 09/20/1988 |
| 4765135 | Gas turbine engine A gas turbine engine for an aircraft comprises a gas generator which includes a compressor stage, a combustion chamber, and a turbine for driving the compressor, and through which the air and combustion gases flow from the rear towards the front in relati... | 08/23/1988 |
| 4738589 | Propeller module for an aero gas turbine engine A propeller module for an aero gas turbine engine comprising two contra-rotating propellers has a reduction gear train positioned axially between the propellers. Pitch change mechanism are provided to change the pitch of the blades of both propellers inde... | 04/19/1988 |
| 4730795 | Heliplane The basic characteristics of an airplane and of a helicopter are combined into one flying craft: a HELIPLANE. This aircraft can fly forward like an airplane and hover like a helicopter. In the hovering mode, the craft lifting force is generated by gyratin... | 03/15/1988 |
| 4728261 | Propeller module for an aero gas turbine engine A propeller module for a gas turbine engine comprising two contra-rotating propellers has a reduction gear positioned axially between the propellers. Pitch change mechanisms are provided to change the pitch of the blades of both propellers independent of ... | 03/01/1988 |
| 4688995 | Propeller module for an aero gas turbine engine A propeller module for an aero gas turbine engine comprises two contra-rotating propellers driven by a reduction gearbox positioned axially between the propellers. Pitch change mechanisms operated by a pitch change power unit are provided to change the pi... | 08/25/1987 |
| 4657484 | Blade pitch varying means Blade pitch varying means for use in a gas turbine engine are disclosed. The blade pitch varying means may be used on an engine with a single row or two counterrotating rows of variable pitch blades which are disposed outwardly from an annular gas flowpat... | 04/14/1987 |
| 4621978 | Counterrotating power turbine An improved counterrotating power turbine is disclosed. The power turbine includes a support having an annular axial cross-section and forward and aft portions. The forward portion of the support has a diameter greater than the diameter of the aft portion... | 11/11/1986 |
| 4599041 | Variable camber tandem blade bow for turbomachines Multiple flat-plate blade rows of pitch adjustable blades are offset mounted in a manner such that when flat-plate blades in adjacent rows are aligned at a specific pitch setting, respective flat-plate blades of the adjacent rows nearly mate. The offset b... | 07/08/1986 |
| 4591313 | Propeller pitch control system and apparatus A plurality of propeller blades are mounted to an axially elongated tubular propeller hub (H1). Each blade is rotatable in position about a radial axis. An electromechanical linear actuator (A1) is housed within the hub for rotating the blades to change t... | 05/27/1986 |
| 4486146 | Aircraft propulsion means An aircraft propulsion means 20 comprises a multibladed, unshrouded, propeller fan 27 adapted in a cruise condition to operate at such high disc loadings that a substantial component of swirl is imparted to the slipstream in a given sense, and swirl reduc... | 12/04/1984 |
| 4483658 | Rotational wake reaction steps for Foils The action of upstream and downstream foil sets rotating on a common shaft within a fluid is enhanced by fixing certain interrelations of the foils such as the axial distance between the foils, the radial index between foils and pitch of one foil relative... | 11/20/1984 |
| 4027999 | Analog mixer to vary helicopter rotor phase angle in flight An analog mixer for a helicopter rotor control system mounted for tilting motion about a variable tilt axis and connected to the rotor control swashplate to cause synchronous tilting and including means to impart tilt generating control inputs to the anal... | 06/07/1977 |
| 3986794 | Reversible ducted fan assembly A gas turbine engine of a ducted-fan bypass type includes a fan with a plurality of circumferentially spaced airfoils thereon each including first and second portions thereof defining a forward thrust airfoil having a chord to blade spacing ratio greater ... | 10/19/1976 |
