Celebrity Inventors
Magician Harry Houdini patented a "Diver's Suit" enabling the wearer to "quickly divest himself of the suit while being submerged and to safely escape and reach the surface of the water."
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7267530 | Windmill apparatuses and methods of mounting blades to enhance their performance A windmill apparatus has multiple pairs of blades to enhance power output and lift performance. The apparatus has multiple double acting piston/cylinders actuated by the windmill, which includes several clutches that are used to engage and disengage the windmill fro... | 09/11/2007 |
| 7179054 | Flow reversal system for axial fan An axial fan has a blade support wheel coupled to a drive shaft. A disk is positioned about the drive shaft adjacent the wheel. A torsion spring is coupled to the wheel and to the disk. When the torsion spring is in tension, the disk is poised for a relative rotatio... | 02/20/2007 |
| 7134840 | Rotor system for a remotely controlled aircraft A remotely controllable flying machine, such as a remote control ultralight helicopter, has at least one rotor blade (104), the pitch (α) of which may be adjusted. The adjustment of the pitch (α) of the at least one rotor blade is achieved by means of a for... | 11/14/2006 |
| 7048506 | Method and apparatus for magnetic actuation of variable pitch impeller blades An integrated propulsion and guidance system for a vehicle includes an engine coupled to an impeller via a driveshaft to produce propulsive force. The impeller includes a hub and a plurality of blades, including at least one control blade pivotably mounted to the hu... | 05/23/2006 |
| 6981844 | Cyclic actuation system for a controllable pitch propeller and a method of providing aircraft control therewith A propeller control generates a once per revolution (1P) blade thrust variation through cyclic pitch of rigidly mounted non-flapping propeller blades. The resultant shaft bending moment is used to provide aircraft attitude control. Axial translation of a pitch chang... | 01/03/2006 |
| 6926566 | Method and apparatus for synchronous impeller pitch vehicle control An integrated propulsion and guidance system for a vehicle includes an engine coupled to an impeller via a driveshaft to produce propulsive force. The impeller includes a hub and a plurality of blades, wherein one or more of the blades is pivotably mounted to the hu... | 08/09/2005 |
| 6925805 | Turbocharger The invention concerns an exhaust gas turbocharger for an internal combustion engine, with at least one turbine arranged in the exhaust gas stream downstream of the internal combustion engine, wherein the turbine includes at least one flow channel with at least one ... | 08/09/2005 |
| 6142735 | Variable-pitch propeller, especially for sport craft A variable-pitch propeller, especially for a sport board, has angularly displaceable blade support plates which can be rotated about respective radial axes. The plates are provided with radially inwardly directed claws which engage in circumferential groo... | 11/07/2000 |
| 6113352 | Hingeless rotor with precompressed half-bearings supporting blade root oversleeves on torsionable blade root strips Each blade of the rotor has a rigid root oversleeve connected to a torsionable and flexible root strip by two laminated, spherical support half bearings, fixed by their outer frame with double rigid horns the lateral ends of which facing each other on eac... | 09/05/2000 |
| 6113351 | Variable pitch fan A variable pitch fan in which the pitch of the fan blades is varied under control of a controller according to the speed of the fan. The controller is programmed to respond to increased fan speed by decreasing pitch of the fan blades. The variable pitch f... | 09/05/2000 |
| 6065933 | Folding rotor blade/propeller drive and pitch control actuator A propulsion blade retraction and pitch control apparatus includes a hollow primary drive shaft, a pitch control gear assembly mounted, within a propeller hub, to the primary drive shaft, a radially spaced array of pitch control stub shafts mounted to, in... | 05/23/2000 |
| 5967753 | Controllable-pitch propeller, especially for sport boats and other watercraft A controllable-pitch propeller for a sport-type watercraft has a push rod eccentrically connected to each blade displaceable in a bore of the propeller hub. The push rod is sealed with respect to the end of that bore by a multifold bellows whose radial fl... | 10/19/1999 |
| 5685694 | Air driven turbine having a blade pitch changing mechanism including overspeed protection An air driven turbine having variable pitched blades is provided that includes a pitch change mechanism for adjusting the pitch of the blades during either rotating or non-rotating operational modes of the air driven turbine. The pitch control mechanism i... | 11/11/1997 |
| 5527154 | Variable pitch boat prop A variable pitch boat prop includes a hub fixed to the prop shaft, a sleeve surrounding the hub and having bearings which receive stub shafts from a plurality of blades. The stub shafts pivot in the bearings, so that the blade pitch can change. Pinion tee... | 06/18/1996 |
| 5415525 | Ducted tail rotor providing torque reaction and yaw attitude control A tail rotor for a rotary wing aircraft is located in a laterally directed duct located at the end of a tail cone extending rearward from the aircraft cabin and at the base of an empennage extending upward from the duct. The rotor includes a rotor shaft d... | 05/16/1995 |
| 5297934 | Compensation for kinematic foreshortening effect in pitch control system for rotary wing aircraft A rotor for a rotary wing aircraft includes a rotor shaft driveably connected to a power source, a rotor hub connected to the rotor shaft, rotor arms inclined with respect to a plane perpendicular to the rotor axis and pitch shafts supported on each rotor... | 03/29/1994 |
| 5249992 | Marine propulsion unit with controlled cyclic and collective blade pitch An integral marine propulsion unit utilizes both collective and cyclic propeller blade pitch angle variations to generate a thrust vector in any of three degrees of motion for use with both the submersible and surface marine vessels. The present marine pr... | 10/05/1993 |
| 5213472 | Inboard servo for marine controllable pitch propellers An inboard servo for a controllable pitch propeller of the force rod type comprises a feedback device comprising a feedback ring located externally of the propeller drive shaft, affixed to the force rod for rotation and axial translation therewith and hav... | 05/25/1993 |
| 5163815 | Rotor blade control mechanism A rotor blade control mechanism includes a transmission driving a hollow rotating drive shaft, extending through the transmission. A rotor head is attached to a top end of the drive shaft and includes rotor blade shafts of variable pitch and having contro... | 11/17/1992 |
| 5159620 | Variable pitch propeller apparatus The invention relates to a propeller assembly, particularly suitable for use with axial flow pumps. The propeller assembly is provided with a cam-operated rotatable propeller blade compression shaft which rotates in response to a detected increase load on... | 10/27/1992 |
| 5145318 | Flange-mounted controllable pitch marine propeller A controllable pitch marine propeller includes a hub body having a forward section provided with holes for bolts and locating and torque pins and a frontal surface that mates with a hub flange and an internal flange that defines an annular cavity and rece... | 09/08/1992 |
| 5116209 | Device of retractable stops for rotor blades of giroplanes, and rotor head including such a device A device of retractable stops for the blades of articulated rotors for giroplanes, which includes a stationary stop 20 with a finger 22 radially converging towards the exterior and externally radially protruding on the external spar 9 of the articulation ... | 05/26/1992 |
| 5028210 | Propeller unit with controlled cyclic and collective blade pitch An improved integral marine propulsion unit is disclosed that can generate a thrust vector in any of three degrees of motion. The unit utilizes both collective and cyclic propeller blade pitch angle variation to generate these thrust. This unit obviates t... | 07/02/1991 |
| 4960397 | Variable pitch propeller assembly A variable pitch propeller assembly includes a hollow casing which, at its inner surface, fits securely around the propeller shaft. The outer surface of the casing forms the general shape of a cylinder which is coaxially located with respect to the propel... | 10/02/1990 |
| 4941802 | Multi-bladed propulsion apparatus The present invention provides for a propulsion apparatus for fluid medium comprising an open-ended sleeve having an inlet and outlet for flow through of fluid and a series of cooperating blades positioned along the sleeve. Each of the blades has a leadin... | 07/17/1990 |
| 4810166 | Controllable pitch marine propeller A controllable pitch marine propeller comprises a hub body carrying a plurality of propeller blades for rotation about pivot axes disposed radially of the hub axis, a force rod extending into the hub body from the propeller shaft, and a cross-head affixed... | 03/07/1989 |
| 4744727 | Controllable pitch propeller and watercraft drive A controllable pitch propeller assembly has an inner housing attached to a main drive shaft, the housing having rails on the outer surface thereof. Modules carrying the propeller blades are positively mounted on the rails, each module having a housing rec... | 05/17/1988 |
| 4715784 | Blade support hub for an axial fan A blade support hub of hollow circular ring structure for an axial fan, constituted essentially of two opposing parts rigidly fixed together by bolts, the hollow circular ring structure being provided with circular cavities for inserting the fan blade sha... | 12/29/1987 |
| 4183715 | Adjustable vane windmills A system of rotatably and pivotally mounted radially extended bent supports for radially extending windmill rotor vanes in combination with axially movable radially extended control struts connected to the vanes with semi-automatic and automatic torque an... | 01/15/1980 |
| 3967916 | Fan assembly A fan assembly particularly adaptable for use with an induced draft heat exchanger having a fan with a plurality of variable pitch blades, a drive mechanism and a pitch control mechanism, wherein the drive mechanism and the pitch control mechanism are des... | 07/06/1976 |
