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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 |
| 8083498 | System and method for position control of a mechanical piston in a pump Embodiments of the systems and methods disclosed herein utilize a brushless DC motor (BLDCM) to drive a single-stage or a multi-stage pump in a pumping system for real time, smooth motion, and extremely precise and repeatable position control over fluid movements an... | 12/27/2011 |
| 8029247 | System and method for pressure compensation in a pump Systems and methods for maintaining substantially a baseline pressure in a chamber of a pumping apparatus are disclosed. Embodiments of the present invention may serve to control a motor to compensate or account for a pressure drift which may occur in a chamber of t... | 10/04/2011 |
| 7316545 | Reducing agent pump for an exhaust-gas aftertreatment system of an internal combustion engine A reducing agent pump has a pump inlet part and a pump outlet part closing off the pump body at its ends. One or both of the inlet and outlet parts is of two-part construction, with a closure element and another element. The two elements are prestressed relative to ... | 01/08/2008 |
| 7258676 | Device and method for low pressure compression and valve for use in the system The present invention relates generally to compression devices and, more particularly to a method using air flow to close the exhaust valve in each sleeve, allows air to fill the sleeve to a pretuned pressure, and finally deflating the sleeve by letting the air flow... | 08/21/2007 |
| 7192259 | Variable capacity rotary compressor A variable capacity rotary compressor with upper and lower compression chambers having different capacities, the upper and lower compression chambers being partitioned from each other, and a rotary shaft extending through the upper and lower compression chambers. Th... | 03/20/2007 |
| 7153109 | Variable capacity rotary compressor A variable capacity rotary compressor includes a hermetic casing, a housing installed in the hermetic casing to define therein first and second compression chambers having different capacities, and a compressing unit placed in the first and second compression chambe... | 12/26/2006 |
| 7047205 | Management of the flow of persons in relation to centers of crowd concentration via priority control A method and system for the loading of patrons at multiple attractions at an entertainment includes the first-in first-out line and a priority based line. A cellular telephone is used to obtain and claim priority status. In other forms different priorities are estab... | 05/16/2006 |
| 6966760 | Reciprocating fluid pump employing reversing polarity motor A reciprocating pump includes a drive section and a pump section. The drive section has a reciprocating coil assembly to which alternating polarity control signals are applied during operation. A permanent magnet structure of the drive section creates a magnetic flu... | 11/22/2005 |
| 6945062 | Heat pump water heating system including a compressor having a variable clearance volume A heat pump water heater system includes a compressor that has a variable clearance volume that can be selectively controlled to control the mass flow rate of refrigerant from the compressor. Under higher ambient air temperature conditions, the variable volume is in... | 09/20/2005 |
| 6932588 | Variable capacity rotary compressor A variable capacity rotary compressor includes a housing defining a cylindrical compression chamber therein and having an inlet port and an outlet port communicating with the compression chamber. A rotating shaft is provided with an eccentric part to rotate in the c... | 08/23/2005 |
| 6811380 | Apparatus and method for controlling linear compressor An apparatus and method of controlling a linear compressor. The apparatus includes a current detection unit to detect current, a control unit to determine whether a collision between a piston and a valve occurs, and controlling a stroke of the linear compressor, and... | 11/02/2004 |
| 6786705 | Variable displacement compressor A variable displacement compressor has a drive shaft, a rotor supported by the drive shaft, a drive plate supported by the drive shaft and a hinge mechanism located between the rotor and the drive plate. The hinge mechanism includes a cam, which is located on the ro... | 09/07/2004 |
| 6726459 | Variable injection rate high pressure fuel pump A high pressure fuel pump having a variable fuel injection rate, including a pump body, a pump cylinder formed in the pump body and a piston reciprocable within the pump cylinder, which defines a pressurization chamber. The pump piston has a reduced diameter portion... | 04/27/2004 |
| 6709244 | Diagnostic system for a compressor A scroll type machine incorporates a unique system for monitoring the status of a valve which is used to control the capacity of the compressor. The valve functions to open and close a fluid passage between two areas of the compressor for capacity modulation. By mon... | 03/23/2004 |
| 6641371 | Device for continuous regulation of the gas flow rate processed by a reciprocating compressor A device (10) for continuous regulation of the gas flow rate processed by a reciprocating compressor, wherein the reciprocating compressor has at least one first compression piston (35), which is associated with a first cylinder (51), and can create a pre... | 11/04/2003 |
| 6619186 | Servo controlled timing advance for unit pump or unit injector A hydraulically actuated servo piston and hydraulic advance piston are integrated into the cam follower of a unit pump or injector to provide variable advance for an injection event produced by the pump or injector. The servo piston is nested in the advan... | 09/16/2003 |
| 6457946 | Regulatable pump A regulatable pump, in particular a vane pump, is provided with a rotor, with a rotor body and with at least one guide ring and with a cam ring. The eccentricity of the cam ring can be adjusted by means of a regulating piston, a journal of the cam ring ly... | 10/01/2002 |
| 6406269 | Fuel pump A fuel pump comprises a pumping plunger reciprocable within a plunger bore under the action of a cam drive arrangement. The cam drive arrangement comprises first and second surfaces defining therebetween a chamber, the volume of which can be controlled to... | 06/18/2002 |
| 6336317 | Quasi-isothermal Brayton cycle engine An engine is disclosed. According to one embodiment of the present invention, the engine comprises a compressor, and combustor, and an expander. The compressor compresses ambient air. The combustor burns the compressed air, and produces exhaust gasses. Th... | 01/08/2002 |
| 6168385 | Rotary device with means for monitoring and adjusting the clearance between the rotors A rotary device (11) has a first rotor (12) rotatable about a first axis and having at its periphery a recess (14). A second rotor (13) is counter-rotatable to said first rotor (12) about a second axis, parallel to said first axis, and has a radial lobe (... | 01/02/2001 |
| 5674053 | High pressure compressor with controlled cooling during the compression phase A high pressure gas compressor in one embodiment having an internal two staged compression with a compression chamber formed in part by a positive displacement, stepped piston and cylinder configuration, providing a first stage compression by an enlarged ... | 10/07/1997 |
| 5647730 | Self-contained, clearance-volume adjustment means for a gas compressor In association with a straight-cylinder, reciprocating gas compressor, hydraulic circuitry and valving is provided to track movement of an intake valve which cooperates with an end of the compressor to define a clearance volume. The valving is selectively... | 07/15/1997 |
| 5315971 | Lubricating oil supplying device for engine Embodiments of lubricant pumps for machines wherein the pump comprises a pumping plunger slidably supported within a bore. The quantity of lubricant delivered during a stroke of the pumping plunger is adjusted by means of a stop plunger which is mounted w... | 05/31/1994 |
| 5295807 | Variable output pump adjustment mechanism An auxiliary chamber is connected to the main pumping chamber of a liquid dispensing pump. The auxiliary chamber includes a resilient rolling diaphragm in fluid communication with the fluid in the main pumping chamber and is expandable for receiving liqui... | 03/22/1994 |
| 5203683 | Screw type pump A screw pump having a pair of screw rotors meshed with each other and rotatably supported in a housing having an intake port provided at one end and a piston movably provided at the other axial end of the housing, which piston defines a discharge port in ... | 04/20/1993 |
| 5106275 | Arrangement on a pump unit Pump units comprising a metering reciprocating pump with adjustable length of stroke are used in packing machines for filling of packing containers with a metered quantity of flowable contents, e.g. yogurt. Adjustments in the length of stroke in order to ... | 04/21/1992 |
| 5049040 | Compressor capacity modulation A variable capacity compressor in which each compression chamber has a reexpansion chamber the volume of which is selectively controlled by pressurized lubricant.... | 09/17/1991 |
| 4944658 | Lubrication pump with an adjustable metering device A lubrication pump with a stroking action of a delivery piston and with regulatable metering of the amount of lubricant delivered with each stroke of the pump, wherein the delivery piston is actuated by the pump and aspirates the lubricant into a suction ... | 07/31/1990 |
| 4883467 | Reciprocating pump for an implantable medication dosage device A reciprocating pump suitable for use in an implantable medication dosage device has a piston movable in a chamber connected to a medication reservoir, the chamber having an output closable by a check valve. The check valve includes a movable element whic... | 11/28/1989 |
| 4775299 | Variable clearance pocket piston positioning device A clearance pocket having a housing attached to a cylinder of the compressor. In one embodiment, in which the housing has a sidewall and a distal wall and includes a clearance chamber with a passageway extending between the cylinder head and the clearance... | 10/04/1988 |
| 4737078 | Control valve for a pump with variable displacement volume A control valve for a variable displacement pump is improved so that the levelling of the pressure fluctuations of the pump is better and quicker. For this purpose an additional control piston portion on the control piston of the control valve is used. Co... | 04/12/1988 |
| 4715791 | Metering pump An arrangement for the volume-controlled feed of a medium, e.g. a liquid, in an outer flow system, comprising a movable pump piston (10) and a metering chamber (20) in connection, or connectable, to the flow system via a valve-controlled inlet (22) and ou... | 12/29/1987 |
| 4685489 | Valve assembly and compressor modulation apparatus A method and several embodiments of apparatus are disclosed for modulating the capacity of a gas compressor. A discharge valve member is formed with an opening therein and fluid communication between the compression chamber and a clearance pocket is selec... | 08/11/1987 |
| 4674956 | Control valve for a pump with variable displacement volume A control valve for a variable displacement pump is improved so that the levelling of the pressure fluctuations of the pump is better and quicker. For this purpose an additional control piston portion on the control piston of the control valve is used. Co... | 06/23/1987 |
| 4560326 | Diaphragm type pump device A diaphragm type pump device comprising a casing having a cover in which an inlet valve is installed, a diaphragm dividing the interior of the casing into a suction chamber and a discharge chamber, a movable plate attached with the diaphragm and having a ... | 12/24/1985 |
| 4496286 | Control system for engine-driven compressor unit and method of operation thereof A control system for a compressor unit driven by a clean-burn, turbo-charged, gas-fueled engine which is primarily responsive to the load (torque) and the speed of the engine to adjust certain engine parameters to maintain the operating conditions of the ... | 01/29/1985 |
| 4480965 | Capacity modulation device for compressor A simple capacity modulation device for a compressor is disclosed which includes a modulating member slidably disposed in a cylindrical enclosure associated with a compression chamber. Pressure from a low pressure chamber or a high pressure chamber is pil... | 11/06/1984 |
| 4473340 | Combined fluid pressure actuated fuel and oil pump Disclosed herein is a combined fuel and oil pump comprising a reciprocally movable member for pumping fuel in response to member reciprocation, a reciprocally movable element for pumping oil in response to element reciprocation, and a fluid pressure actua... | 09/25/1984 |
| 4472111 | Apparatus for generating high pressure fluid The present invention comprises an apparatus for producing high pressure fluid by means of a cylinder having a reciprocatingly sliding ram inside, suction and pressurization of the fluid being performed by the reciprocation of said ram. In the apparatus, ... | 09/18/1984 |
| 4453522 | Apparatus for adjusting the timing of a fuel injection pump Apparatus is provided for temporarily advancing the timing of a fuel injection pump of the type having timing means responsive to a source of fuel under pressure correlated with the speed of an associated engine and also to the pressure of fuel in the pum... | 06/12/1984 |
