Did You Know...
...In 1790, the cost to obtain a patent was between $4 and $5.
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 |
| 7153110 | Variable volume flow internal gear pump Rotational pump with variable volume flow, comprising a pump housing having a suction connection and a pressure connection, an outer rotor with inner toothing which is rotatably disposed inside the housing, and an inner rotor with outer toothing which is eccentrical... | 12/26/2006 |
| 7128544 | Crescent seal for the cylinder of a vane motor A vane motor is modified to increase the sealing effectiveness of the gap made at the interface of the spindle and cylinder by undercutting the cylinder a predetermined amount and distance so as to increase the effectiveness of the spindle to cylinder gap and to dec... | 10/31/2006 |
| 7059842 | Variable capacity rotary compressor A variable capacity rotary compressor including a hermetic casing, and a housing installed in the hermetic casing to define therein first and second compression chambers having different capacities. A compressor is placed in the first and second compression chambers... | 06/13/2006 |
| 7048526 | Shared slot vane pump A rotary piston pump comprising a rotor mounted within a housing, the rotor having a pair of slidably mounted vanes on opposite surfaces. The inner wall of the housing acts as a cam surface to move the vanes inwardly, and centrifugal force or a combination of centri... | 05/23/2006 |
| 6896502 | Fluid cannon positive displacement pump A positive displacement pump comprising a casing having an interior chamber and an inlet and an outlet oppositely spaced within the chamber. A rotor with a cylindrical outer surface is secured in offset position within the chamber. An end disk is secured to each end... | 05/24/2005 |
| 6886326 | Quasi-isothermal brayton cycle engine An engine includes a compressor, and combustor, and an expander. The compressor compresses ambient air. The combustor burns the compressed air, and produces exhaust gasses. The expander receives the exhaust gases from the combustor, and expands the exhaust gasses. T... | 05/03/2005 |
| 6386172 | Variable bandwidth striated charge for use in a rotary vane pumping machine A rotary vane combustion engine is provided that has a plurality of vane cells. This rotary vane combustion engine includes a rotor having a plurality of vanes; a stator enclosing the rotor to form a plurality of vane cells between the plurality of vanes;... | 05/14/2002 |
| 5572959 | Method for controlling the working cycle in an internal combustion engine and an engine for performing said method In-line engine with variable compression, comprising a cylinder receiving section which is tiltably mounted in the crankcase section (4) of the engine, in which the crankshaft is mounted by means of crankshaft bearings (90) arranged in the lower region of... | 11/12/1996 |
| 5558511 | Sliding vane machine having vane guides and inlet opening regulation A sliding vane machine with a cylindrical rotor (11) eccentrically placed in a housing, the rotor being rotatably mounted in the housing with its periphery in contact with the interior of the housing at one point and being provided with a number of vanes ... | 09/24/1996 |
| 5501586 | Non-contact rotary vane gas expanding apparatus A non-contact rotary vane gas expanding apparatus functions to convert controlled expansion of gas under pressure to rotary motive power. The gas expanding apparatus includes a stator housing, a rotor supported in the stator housing to undergo rotation re... | 03/26/1996 |
| 5423298 | Rotary internal combustion engine A rotary internal combustion engine including a plurality of variable compression ratio rotating combustion chambers or alternatively stationary combustion chambers, a multi-piston movable assembly or alternatively a multi-sector movable assembly, a multi... | 06/13/1995 |
| 5410998 | Continuous external heat engine A thermal engine utilizing a positive displacement rotary expander and preferably a positive displacement rotary compressor in conjunction with an external substantially steady-state thermal source, such as a continuous fuel combustor, the external source... | 05/02/1995 |
| 5362219 | Internal combustion engine with compound air compression A rotary air compressor with a housing forming an epitrochoidal chamber in which a multilobed rotor with a ring gear eccentrically rotates on an internal central gear in the housing, the rotor dividing the chamber into multiple subchambers of changing vol... | 11/08/1994 |
| 5168846 | Rotary engine with variable displacement A rotary engine having an epitrochoidal engine component and a supercharger component connected to the engine component by a variable transmission, the engine component having valve plugs for varying the effective displacement of air compression according... | 12/08/1992 |
| 5165238 | Continuous external heat engine A thermal engine utilizing a positive displacement rotary expander and preferably a positive displacement rotary compressor in conjunction with an external substantially steady-state thermal source, such as a continuous fuel combustor, the external source... | 11/24/1992 |
| 5032069 | Rotary position displacement pump or motor A hydraulic device has an inner rotor of cylindrical section mounted eccentrically within an outer rotor of tubular section. Angularly spaced axially extending ribs of part-circular cross-section are provided on the inner rotor and correspondingly spaced ... | 07/16/1991 |
| 5018948 | Rotary displacement compressor with adjustable outlet port edge The invention relates to a rotary displacement compressor having volume ratio regulation. A connection channel (8,9,10) connects the working space of the compressor to the pressure channel (5). In the channel (8,9,10) there is provided means (13) for sens... | 05/28/1991 |
| 5009577 | Rotary compressor of variable displacement type A rotary compressor of variable displacement type comprises a cylinder, a rotor accommodated in the cylinder in an eccentric relationship therewith, at least one vane incorporated in the rotor through an outer periphery of the latter and movable relative ... | 04/23/1991 |
| 5005765 | Method and apparatus for applying multicomponent materials A method and apparatus for metering and pumping multicomponents of high and low viscosity materials and subsequently mixing and applying the mixture includes gear pumps for pumping each component. Each gear pump has gears operating in a gear housing for r... | 04/09/1991 |
| 4909716 | Screw step drive internal volume ratio varying system for helical screw rotary compressor A large slide valve member concentrically mounts a small slide valve member or slide stop at one end thereof proximate to a helical screw rotary compressor discharge port with the small and large slide valve members movable as a unit for varying the built... | 03/20/1990 |
| 4737082 | Lift valve for rotary screw compressors When regulating the capacity of a rotary screw compressor in a refrigeration and heating pump system and when varying the built-in volume therein, lift valves are used which operate instantaneously and are either open or closed. In order to ensure suffici... | 04/12/1988 |
| 4714417 | Internal axis single-rotation machine with intermeshing internal and external rotors An internal axis single-rotation machine, wherein an external rotor and an internal rotor are mounted for intermeshing rotation about their own centers of gravity at different angular velocities within a casing and wherein two pairs of radially external s... | 12/22/1987 |
| 4688815 | Hydraulically driven bicycle A hydraulically driven bicycle frame with two axle members coupled to the bicycle frame and front and rear wheels mounted on such axles for rotation about the axis of the respective axle and a pair of pedals mounted on a pedal drive shaft coupled to the b... | 08/25/1987 |
| 4666383 | Rotary machine Rotary machines of the type having a fluid chamber of changing volume, e.g. as ion an engine or pump, in which two rotors rotate in the same direction; a cylindrical surface of the first rotor of substantial arcuate extent, of radius substantially equal t... | 05/19/1987 |
| 4611976 | Capacity and internal compression control device in a screw compressor The invention relates to a device for controlling a screw compressor, in which a rotor housing (10) includes a compression space (15) with two intermeshing rotors. In parallel with the rotors, at their discharge side two axially movable sliding valves (20... | 09/16/1986 |
| 4598559 | Reversible fixed vane rotary compressor having a reversing disk which carries the suction port The reversing of the direction of rotation of the motor of a fixed vane rotary compressor reverses the direction of rotation of the rolling piston. The rolling piston through viscous friction or frictional torque frictionally engages a reversing disk and ... | 07/08/1986 |
| 4579513 | Positive displacement screw machine with separation wall attached to slide valve In a screw volumetric machine, a slide is slidable in a groove along a bore accommodating the screw. This slide is movable to vary the delivery and/or compression ratio. One end of the groove communicates with the low pressure. The other end of the groove... | 04/01/1986 |
| 4577472 | Reversible rotating vane rotary compressor having a movable supplemental suction port A fluid pressure responsive member is shifted in accordance with the pressure differential between two lines either one of which can be a suction line with the other line being a discharge line of a reversible compressor. The fluid pressure responsive mem... | 03/25/1986 |
| 4508089 | Method of regulating the charge of combustion gas delivered to an internal combustion engine In a method of regulating the delivery of the combustion fluid (i.e. air or mixture of air and fuel) to an internal combustion engine (1), the combustion fluid is conducted through a gas engine or positive displacement device capable of operating as a flu... | 04/02/1985 |
| 4501535 | Variable flow reversible vane pump A variable flow reversible vane pump having a rotor with slidable vanes, a shaft providing rotary power take off for the rotor and a cam ring wherein said rotor rotates with the vanes engaging the inside of the cam ring. A case encases the cam ring and a ... | 02/26/1985 |
| 4421462 | Variable displacement pump of vane type A pump of vane type which sucks in and discharges fluid includes a pump body which is provided with at least two sets of intake ports and discharge ports, which communicate with a low pressure chamber and a high pressure chamber, respectively. An intake p... | 12/20/1983 |
| 4364714 | Process to supercharge and control a single screw compressor A process to supercharge and control a compressor comprising a single screw co-operating with at least two pinions in order to constitute as many partial compressors as there are pinions, such partial compressors operating in parallel and one of them at l... | 12/21/1982 |
| 4299097 | Vane type compressor employing elliptical-circular profile A rotary compressor for use in air conditioning or the like including a housing having a chamber with a cylindrical rotor journaled therein, the rotor having a set of vanes radially slidable to define enclosed compartments between them. The curved outer w... | 11/10/1981 |
| 4241713 | Rotary internal combustion engine A rotary internal combustion engine having a housing defining a chamber is disclosed. A fixed shaft extends coaxially through the chamber. A plurality of vanes are pinned to a collar which is rotative about the shaft. One vane is rigidly secured to the co... | 12/30/1980 |
| 4234296 | Screw compressor A screw compressor including a male rotor and a female rotor forming a pair, a rotor casing enclosing the pair of rotors and cooperating therewith to define a working chamber for compressing gas, a suction port and a discharge port formed in a suction cov... | 11/18/1980 |
| 4074957 | Screw compressors A single screw, gate rotor machine in which compressible fluid is fed to the machine through a low pressure inlet and exhausts through a higher pressure outlet, in which an unloading valve is provided in the casing adjacent to the high pressure side of th... | 02/21/1978 |
| 4068985 | Rotary engine or pump construction A rotary engine or pump employs a block or housing having a cylindrical cavity along the axis of which extends a cylindrical drive shaft supported on the block to permit rotation thereof. Within the cavity, parallel edge walls axially spaced apart from on... | 01/17/1978 |
| 4043704 | Double-acting rotary expansible chamber pump adaptable to series or parallel operation In a double-acting rotary compressor having two compression spaces each constituted by at least one variable-volume compression chamber which is put into communication first with the suction enclosure and then with the discharge enclosure, the power consu... | 08/23/1977 |
| 4028016 | Rotary displacement compressor with capacity control A rotary displacement compressor having a driven cylindrical rotor inside a casing provided with spirally-extending grooves, and at least one gear in sealing engagement with the teeth of the rotor in which the axis of rotation of the gear intersects the a... | 06/07/1977 |
