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| Number | Title | Issue Date |
| 7398757 | Toroidal engine method and apparatus A rotary motion device having piston valves that define an open region that are adapted to engage a power tooth of the power ring as the power ring rotates around the piston valves and the piston valves rotate about their own separate axis that is fixed with respect... | 07/15/2008 |
| 7255545 | Double-lobe type rotor design process A double-lobe type rotor design process includes a process for forming a defined rotor and a process for forming a conjugate rotor, wherein the defined rotor and the conjugate rotor intermesh and conjugate to each other. The rotor profile curves suitably for the com... | 08/14/2007 |
| 7201134 | Parallel rotary engine This rotary engine is made up of three parallel encased rotors; a male rotor, flanked by a female compression/combustion rotor, and a female separation rotor, all three coupled for synchronous rotation. The male rotor has lobes projecting from it, which mesh with co... | 04/10/2007 |
| 7128543 | Compressor machine with two counter-rotating rotors The compressor machine has two rotors rotating in opposite directions, which are fitted to two parallel, spaced apart shafts mounted in a housing. One of the shafts is driven directly and the other by intermeshing toothed gears mounted on the shafts. The housing has... | 10/31/2006 |
| 7080976 | Volumetric rotary machine A fluid flow displacement rotary machine is provided which includes a casing including an inclined rib on an inner surface thereof, and a shaft provided coaxially with the casing such that the shaft and the casing are rotatable with respect to each other. A disk is ... | 07/25/2006 |
| 6808121 | Fluid pump A fluid pump for pumping fluidized materials comprises a motor, a material pump, and a closed-loop pressure hydraulic system interconnecting the motor and the material pump. The closed-loop hydraulic system further comprises a hydraulic pump, a pressure regulator, a... | 10/26/2004 |
| 6782866 | Rotary machine and thermal cycle A rotary machine having a housing with rotary components disclosed within. The rotary machine is configurable as an internal combustion rotary engine, an external combustion rotary engine, a gas compressor, a vacuum pump, a liquid pump, a drive turbine, or a drive t... | 08/31/2004 |
| 6776594 | Rotor mechanism The present invention provides an improved rotor mechanism to improve the mechanism of the intermeshing displacement rotor and valve rotor. The main feature is that the displacement rotor and the valve rotor provide the operation curve from the carryover period to i... | 08/17/2004 |
| 6773243 | Rotary piston machine for compressible media Rotary piston machine for compressible media, with rotary pistons sealed tight in a common housing and rotatable with one another in a controlled manner, the rotary pistons having a plurality of disk-shaped sections engaging in one another in pairs, whose thickness ... | 08/10/2004 |
| 6729863 | Rotary pump having high and low pressure ports in the housing cover The pump for generating pressure or negative pressure comprises a pump chamber (32) which has a high-pressure port and a low-pressure port. Two rotors (28, 30) having at least two blades are fitted to two parallel shafts (20, 22) in the pump cha... | 05/04/2004 |
| 6684825 | Rotary machine and thermal cycle A rotary machine having a housing with rotary components disclosed within. The rotary machine is configurable as an internal combustion rotary engine, an external combustion rotary engine, a gas compressor, a vacuum pump, a liquid pump, a drive turbine, o... | 02/03/2004 |
| 6672275 | Rotary machine and thermal cycle A rotary machine having a housing with rotary components disclosed within. The rotary machine is configurable as an internal combustion rotary engine, an external combustion rotary engine, a gas compressor, a vacuum pump, a liquid pump, a drive turbine, o... | 01/06/2004 |
| 6672274 | Rotary piston internal combustion engine A rotary internal combustion engine has a housing and a working wheel mounted rotatably in the housing. At least one working piston is provided on the working wheel for taking in and compressing air or a fuel-air mixture and for converting gas pressure re... | 01/06/2004 |
| 6604503 | Rotary machine A rotary machine in which plural, non-cylindrical rotors are provided for rotation within partially overlapping cylindrical bores, formed within a machine housing. Each rotor each said rotor has a curved outer surface formed of a plurality of contiguous m... | 08/12/2003 |
| 6484687 | Rotary machine and thermal cycle A rotary machine having a housing with rotary components disclosed within. The rotary machine is configurable as an internal combustion rotary engine, an external combustion rotary engine, a gas compressor, a vacuum pump, a liquid pump, a drive turbine, o... | 11/26/2002 |
| 6439865 | Vacuum pump In order to simultaneously generate pressure and negative pressure with a single-stage pump, said pump has a pump chamber (18) that is formed in a housing and that is provided with a suction port, a pressure port and a charging port. There is a pair of ro... | 08/27/2002 |
| 6419472 | Gear unit for a deep-borehole pump The gear unit for a delivery pump installed in a deep borehole has a toothed gear unit with a pinion located on input shaft (2) and a gear wheel engaged with the pinion, which gear wheel is located on a vertical output shaft (5) driving the delivery pump.... | 07/16/2002 |
| 6364642 | Rotary piston machine with three-blade rotors In order to simultaneously generate pressure and negative pressure with a single-stage rotary piston machine, said machine has a chamber (18) that is formed in a housing and that is provided with a suction connection, a pressure port and a charging port. ... | 04/02/2002 |
| 6352420 | Complex teeth-type gas compressor A compound teeth type gas compressor comprises a housing with an upper end cover and a lower end cover mounted on both sides of the housing for constituting a seal cavity, a pair of meshing gears rotatably accommodated in the cavity, each gear having two ... | 03/05/2002 |
| 6302079 | Dual ignition and controlled intake rotary motor and method of operation The present invention is directed toward a rotary combustion motor and method of operation. The rotary combustion engine has dual rotors that are driven by timed combustions of fuel in a large combustion chamber and a small combustion chamber. Intake valv... | 10/16/2001 |
| 6241490 | Multirotor vacuum pump A multirotor vacuum pump including a housing, at least two rotors located in the housing and cooperating with each other so that as a result of a contactless movement of the at least two rotors relative to each other, working chambers, into which a to-be-... | 06/05/2001 |
| 6171089 | External gear pump with drive gear seal A metering pump includes a set of externally-toothed gears, with a first of the gears, the drive gear, having a central opening to receive a drive shaft. The gears are supported within a housing defined between first and second housing plates. The first a... | 01/09/2001 |
| 6142759 | Two-shift fluid machine In a Roots displacement fluid machine (5) comprising rotors (15, 17) meshed with each other in a tooth trace (57, 59) formed in parallel to a rotating central axis, and a casing (13) having a rotor chamber (33) rotatably receiving the rotors (15, 17), a f... | 11/07/2000 |
| 6142757 | Integral oil pump An integral oil pump for an apparatus having a plurality of bearings, the oil pump comprising a housing with an opening for a shaft, a cavity within the housing, a ring gear encircling the shaft with clearance between the shaft and an inner surface of the... | 11/07/2000 |
| 6132197 | Toroidal internal combustion engine A rotary engine with one or more toroidal chambers defined by rotors that rotate within cylindrical housings. Pistons project into the chambers from the rotors. The pistons cooperate with valves to define compression regions and expansion regions in the c... | 10/17/2000 |
| 6123533 | Cavitation-free gear pump A positive displacement gear pump useful for pumping hydraulic fluid includes a drive gear and an idler gear. In a first embodiment, the drive gear has symmetrical teeth, whereas the idler gear has asymmetrical teeth. The asymmetrical teeth of the idler g... | 09/26/2000 |
| 6116879 | Fluid machine A pair of rotors (1,3) includes tooth parts (7,9) with a cycloid tooth profile curve and tooth bottom pans (11,13), and are engaged with each other. A housing (2) includes rotor chambers (2a) for rotatably accommodating the rotors (1,3), a suction port an... | 09/12/2000 |
| 5908289 | Gear machines with improved kinematics The gear machine according to the invention includes a driving gear wheel (1) and a driven gear wheel (2) having meshing gear teeth (21,22) having a special novel shape designed to provide improved gear wheel kinematics as well as minimal volume flow rate... | 06/01/1999 |
| 5895847 | Apparatus for generating signal pulses The invention relates to an apparatus for generating signal pulses with a gear arrangement, which has at least two meshing gears and with a sensor means for detecting a gear rotation and for emitting signal pulses as a function on the detected gear rotati... | 04/20/1999 |
| 5682793 | Engaged rotor The present invention relates to a pair of meshed involute gears one of which has work teeth, their tooth-tip circle is larger than that of the said gear, the other has the grooves engaged with the said working teeth. The working teeth and the grooves hav... | 11/04/1997 |
| 5639230 | Gear pump or motor having compensation for volume flow fluctuations A gear pump or motor, has two rotatively guided toothed or gear wheels in a housing, the teeth of which are mutually engaged and separate a compression chamber from a suction or discharge chamber. Depending on the rotation angle $c;1 of a torque-transm... | 06/17/1997 |
| 5600951 | Hydraulic transmission system A hydraulic transmission system including a hydraulic piston drivingly connected to a cam through a plunger shaft, the plunger shaft being connected to the cam through a lever arm such that rotation of the cam results in reciprocating movement of the plun... | 02/11/1997 |
| 5466138 | Expansible and contractible chamber assembly and method Apparatus defining an expansible/contractible chamber includes a housing having a first housing portion and a second housing portion. A rotor rotates within the first housing portion in one direction while a block rotates in the second housing portion in ... | 11/14/1995 |
| 5401151 | Vacuum pumps A mechanical vacuum pump is provided with a pair of cooperating rotors mounted on rotatable shafts within a pumping chamber. Each of the pair of cooperating rotors has a claw profile that terminates in a leading edge shaped to present an angle of no great... | 03/28/1995 |
| 5364249 | Rotary steam engine having rotor side plates A rotary steam engine has a working chamber (14), with first and second cylindrical rotors (1,2) mounted in overlapping cylindrical chamber portions (26, 27) for rotation about respective parallel axes (24, 25), connected by gears (18) for synchronized ro... | 11/15/1994 |
| 5275043 | Positive displacement flowmeter A positive displacement flowmeter is provided having a body structure defining a flowmeter measurement chamber within which is rotatably supported a large primary gear rotor and a small secondary gear rotor that have rotor teeth intermeshing with one anot... | 01/04/1994 |
| 5246358 | Cam-gear pump-compressor apparatus A compressor-pump apparatus utilizing a cam gear 13 with a plurality of teeth 14 and a roller gear 21 with a plurality of rotatable rollers 10, with the gears being in mechanical communication is disclosed. A housing 18 having an inlet port 19 and an outl... | 09/21/1993 |
| 5179921 | Integrated engine and compressor device A combination reciprocating piston device, such as an internal combustion engine, and a rotary machine of the intermeshing gear type, such as a hydraulic pump, are afforded in a compact arrangement that eliminates the need for separate crankshafts or sepa... | 01/19/1993 |
| 5149256 | Rotary, positive displacement machine with specific lobed rotor profile A rotary positive-displacement machine of the type having intermeshing lobed rotors, comprising first and second two-lobed rotors mounted respectively in the two housing bores for synchronous rotation. The first, valve rotor has a hub portion which period... | 09/22/1992 |
| 5088304 | Heat transfer system with recovery means A heat transfer system employing a two-stage compressor and a heat recovery system including a flash vapor receiver which pools warm refrigerant from a system condenser, delivering receiver refrigerant vapor to the compressor at its second stage inlet and... | 02/18/1992 |
