Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7585153 | Upper rotor control system for a counter-rotating rotor system An upper rotor control system is contained within an upper rotor shaft and upper hub assembly of a contra-rotating rigid rotor system. A collective servo assembly includes a hydraulic actuator that provides collective pitch to all blades through axial extension/retr... | 09/08/2009 |
| 7334981 | Counter-rotating gas turbine engine and method of assembling same A method for assembling a gas turbine engine that includes providing a low-pressure turbine inner rotor that includes a first plurality of rows of turbine blades configured to rotate in a first rotational direction, providing a low-pressure turbine outer rotor that ... | 02/26/2008 |
| 7309210 | Turbine engine rotor stack A turbine engine has a first disk and a second disk, each extending radially from an inner aperture to an outer periphery. A coupling, transmits a torque and a longitudinal compressive force between the first and second disks. The coupling has first means for transm... | 12/18/2007 |
| 7300005 | Single motor blower An apparatus for installation of a material having discrete elements. The apparatus includes: (a) a supply material having discrete elements; and (b) a transporter system downstream of the supply material having discrete elements. In the preferred embodiment, the tr... | 11/27/2007 |
| 7270283 | Single motor blower An apparatus for installation of a material having discrete elements. The apparatus includes a supply material having discrete elements and a transporter system downstream of the supply material having discrete elements. In the preferred embodiment, the transporter ... | 09/18/2007 |
| 7264199 | Unloaded lift offset rotor system for a helicopter A rotor system (12) for a helicopter (10) includes a rotating shaft (82). A gimbaled hub assembly (56) is coupled to the rotating shaft (82). Rotating blades (24) and non-rotating blades (33) are coupled to the gimbal... | 09/04/2007 |
| 7234914 | Apparatus and method for enhancing lift produced by an airfoil A compressor or pump employs principles of unsteady delayed stall to enhance the head increase produced by the compressor or pump. Plural airfoil-shaped lifting elements are spaced from each other in a cascade and the fluid is directed into the cascade by a device t... | 06/26/2007 |
| 7226327 | Outboard drive for boats An outboard drive for boats, having a steerable underwater housing (1) which has a wing-profiled portion (2). Projecting at an approximately 90 degree angle from the aft part of one side face (31) of the wing profile is a face portion (32... | 06/05/2007 |
| 7219855 | Rising and moving apparatus and manufacturing method thereof A fluid-structure interactive analysis is performed while n types of wing structure models are caused to flap in accordance with a prescribed model of flapping manner. Based on an analysis, data 1, data 2, . . . data n of physical values related to flu... | 05/22/2007 |
| 7153101 | Pulling marine propeller A pulling marine propeller (1) including multiple propeller blades (4) attached to a propeller hub (5). The propeller hub (5) is attachable to a propeller shaft (9) extending from a drive housing (10) located downstream of t... | 12/26/2006 |
| 7059830 | Axial-flow serial fan This specification discloses a serial fan comprising a plurality of rotor vanes, one or more supports and a frame. Each of the rotor vanes comprises an inlet, an outlet, and one or more blades. Each support supports at least one of the rotor vanes so that the corres... | 06/13/2006 |
| 7056092 | Modular propeller A modular propeller comprises a center hub with an integrated front cap and an aluminum core encapsulated with fiber-reinforced composite polymer resin. A set of replaceable blades have bases that slip into and interlock with corresponding slots in the center hub. A... | 06/06/2006 |
| 6994071 | Two-cycle engine for counter-rotation especially for aviation applications A counter-rotating 2 cycle piston engine with a combustion chamber and an output shaft rotatably mounted to rotate independently about the same propeller centerline of an aircraft. The Internal combustion power is transmitted to the output shaft by means of a conven... | 02/07/2006 |
| 6928977 | Adapter, to interface counter-rotating torque producing engine mechanisms with stationary support accessories, for torque free output and torque sensitive environments The present invention is a novel hydraulic/electric, rotating interface for torque producing engines, including internal combustion engines, which enables a rigidly mounted motor to isolate the power/torque producing components from other stationary accessories, to ... | 08/16/2005 |
| 6763654 | Aircraft gas turbine engine having variable torque split counter rotating low pressure turbines and booster aft of counter rotating fans A gas turbine engine turbine assembly includes a high pressure spool having a high pressure turbine drivingly connected to a high pressure compressor by a high pressure shaft which is rotatable about an engine centerline. A low pressure turbine has counter rotatable... | 07/20/2004 |
| 6761144 | Rotary engine with counter-rotating housing and output shaft mounted on stationary spindle A counter-rotating rotary-piston engine has an output shaft with a cylindrical inner cavity rotatably mounted on a single support spindle in the frame of an aircraft. The output shaft extends substantially through the length of the engine block, which is suitably jo... | 07/13/2004 |
| 6736600 | Rotor with a split rotor blade A rotor through which a fluid flows in a main direction of flow, provided with at least one rotor blade, the rotor blade being arranged to rotate about a rotor axis. The rotor blade extends away from the axis of rotation into the field. To reduce the trailed tip vor... | 05/18/2004 |
| 6684626 | Aircraft gas turbine engine with control vanes for counter rotating low pressure turbines An aircraft gas turbine engine includes a low pressure turbine having a low pressure turbine flowpath and counter rotatable low pressure inner and outer shaft rotors having inner and outer shafts, respectively. The low pressure inner and outer shaft rotor... | 02/03/2004 |
| 6666017 | Counterrotatable booster compressor assembly for a gas turbine engine A counterrotatable booster compressor assembly for a gas turbine engine having a counterrotatable fan section with a first fan blade row connected to a first drive shaft and a second fan blade row axially spaced from the first fan blade row and connected ... | 12/23/2003 |
| 6406261 | Counter propeller propulsion unit A propeller propulsion unit comprising a prime mover, propellers, and rotating force transmission for transmitting the rotating force of the prime mover to the propellers, wherein a counter propeller is fixed to a main shaft and a forward propeller is mou... | 06/18/2002 |
| 6381948 | Driving mechanism with counter-rotating rotors An engine with counter-rotating rotors, which are coaxially arranged and are driven via a shaft by a turbine whose working medium is supplied by a gas generator with an air inlet, the air inlet (3) being arranged between (in the axial direction) the rotor... | 05/07/2002 |
| 6341419 | Loop stacked rotor assembly A plurality of rotors are individually measured for determining relative eccentricity between forward and aft annular mounting ends thereof. The measured rotor eccentricities are stacked analytically to minimize eccentricity from a centerline axis. The ro... | 01/29/2002 |
| 6299495 | Airboat transmission, lubrication system, and associated method A gear-based airboat transmission is provided for driving a pair of coaxial, counter-rotating propellers. The transmission includes a fore output gear rotatably affixable within a housing and affixable to the inner shaft for rotating the outer propeller. ... | 10/09/2001 |
| 6193189 | Rotary engine and helicopter application In a rotary engine having rotating cylinders which burns a fuel which is not mixed with oil there is a real problem of centrifugal force form the rotating engine causing oil to flow into the combustion chambers. The disclosed rotary engine has oil reservo... | 02/27/2001 |
| 6193466 | Counter rotating bypass propeller A propulsion device having fins rotating in opposing directions which are adjustable to avoid collision yet which provide opposing strokes similar to fishtails. At least one adjustable fin is connected at an end of a rotatable hollow primary axle which co... | 02/27/2001 |
| 6176750 | Marine propulsion unit with hydraulic pump An improved hydraulic system for a twin propeller marine propulsion unit. A vertical drive shaft is operably connected to the engine of the propulsion unit and carries a pinion that drives a pair of coaxial bevel gears. An inner propeller shaft and an out... | 01/23/2001 |
| 6082967 | Constant-speed twin spool turboprop unit A constant-speed twin spool turboprop unit including a twin spool gas generator having a low-pressure spool and a high-pressure spool each including a compressor and a turbine which drives the compressor, is described in which at least one propeller of th... | 07/04/2000 |
| 6062926 | Hydraulic system for a dual propeller marine propulsion unit An improved hydraulic system for a twin propeller marine propulsion unit. A vertical drive shaft is operably connected to the engine of the propulsion unit and carries a pinion that drives a pair of coaxial bevel gears. An inner propeller shaft and an out... | 05/16/2000 |
| 6053663 | Device for creating a local water flow A device for creating a localized water jet within a body of water allows for the displacement of material from the floor of the body of water. The device includes two powered screws within a jet pipe. The screws are arranged coaxially and their direction... | 04/25/2000 |
| 6053782 | Airboat transmission, lubrication system, and associated method A gear-based airboat transmission is provided for driving a pair of coaxial, counter-rotating propellers. The transmission includes a fore output gear rotatably affixable within a housing and affixable to the inner shaft for rotating the outer propeller. ... | 04/25/2000 |
| 5954479 | Twin engine, coaxial, dual-propeller propulsion system A twin engine, coaxial, dual-propeller propulsion system employing a unique transmission having two independent drive trains. The first of the two engines exclusively drives a first drive train, which in turn rotates a forward multi-bladed propeller assem... | 09/21/1999 |
| 5890938 | Marine counter-rotational propulsion system A marine propulsion system with counter-rotating propellers is provided with the capability of causing the propellers to rotate at different speeds. A first gear is attached to an inner propeller shaft and a second gear is attached to an outer propeller s... | 04/06/1999 |
| 5839928 | Shifting mechanism for outboard drive A shifting mechanism for an outboard drive of a watercraft provides reduced coupling shock when the forward gears are engaged by a dual clutch assembly, as well as provides for consistent and quick engagement of the clutch assembly with the gear. The shif... | 11/24/1998 |
| 5820345 | Split rotor shaft driven lift fan A split fan for providing lift for an aircraft is described. In one embodiment, a main engine shaft extends to the split fan, and a portion of the split fan is located at an elevation above the main engine shaft and a portion of the split fan is located a... | 10/13/1998 |
| 5807151 | Propeller for marine propulsion drive A blade design for a counter-rotating propeller system improves the performance of the outboard drive on which is it employed when the propellers are run partially exposed. The propeller system includes a pair of counter-rotating propellers that rotate in... | 09/15/1998 |
| 5795200 | Contra-rotating rotor unit A marine propulsion unit has two contra-rotating propellers (15, 16) driven by a single shaft (25) through gearing which includes a set of static planetary gears (40), an external gear (30), and an internal gear (44). The gearing is mounted in an oil-fill... | 08/18/1998 |
| 5791592 | Helicopter with coaxial counter-rotating dual rotors and no tail rotor A helicopter having two engines driving a single rotating drive shaft on which are mounted two spaced counter-rotating coaxial rotors at the same speed and having a tail boom free of a tail rotor and supporting two horizontally spaced pairs of air foils f... | 08/11/1998 |
| 5766047 | Twin propeller marine propulsion unit A twin propeller marine propulsion unit for a watercraft. A vertical drive shaft operably connected to the engine is journaled for rotation in a lower gear case and carries a beveled pinion that drives a pair of coaxial bevel gears. An inner propeller sha... | 06/16/1998 |
| 5743489 | Aircraft with two alternatingly operated propellers of different radius An aircraft has at least one drive motor coupled to first and second propellers for forward thrust of the aircraft. The first propeller is dimensioned for takeoff and landing conditions and for flight conditions below a predetermined first flight altitude... | 04/28/1998 |
| 5575698 | Outboard drive transmission system A transmission for a counter-rotational propeller system of a watercraft outboard drive provides an increased flow area for exhaust discharge behind the transmission within the lower unit. The transmission includes a pair of counter-rotating gears. A fron... | 11/19/1996 |
