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| Number | Title | Issue Date |
| 7278841 | Gerotor pump Improved gerotor pumps comprising laterally constrained floating rings, thereby providing an orthogonal degree-of-freedom and allowing gerotor sets positioned therein to establish their own preferred mesh orientation, and additionally wherein the outer rotor of the ... | 10/09/2007 |
| 7186101 | Gerotor apparatus for a quasi-isothermal Brayton cycle Engine According to one embodiment of the invention, a gerotor apparatus includes an outer gerotor having an outer gerotor chamber, an inner gerotor, at least a portion of which is disposed within the outer gerotor chamber, and a synchronizing apparatus operable to control... | 03/06/2007 |
| 7185625 | Rotary piston power system The rotary piston power system includes a housing having a drum and a cover rotatably mounted on the drum. The drum has high pressure and low pressure ports defined in its peripheral wall and a central separator wall having arcuate end faces and a pair of semicylind... | 03/06/2007 |
| 7008200 | Gerotor apparatus for a quasi-isothermal brayton cycle engine According to one embodiment of the invention, a gerotor apparatus includes an outer gerotor having an outer gerotor chamber, an inner gerotor, at least a portion of which is disposed within the outer gerotor chamber, and a synchronizing apparatus operable to control... | 03/07/2006 |
| 6273695 | Sickleless internal gear wheel pump with sealing elements inserted into the tooth tips A sickleless gear wheel pump includes an internally geared hollow wheel including a plurality of tooth tips. A pinion includes a plurality of tooth tips and meshes with the hollow wheel. The hollow wheel and pinion are rotatably disposed in a housing. The... | 08/14/2001 |
| 6164943 | Internal geared wheel pump without crescent-shaped [sickle] piece An internal geared wheel pump that does not have a crescent shaped piece. The pump has an internal geared wheel that meshes with a pinion. The pinion and geared wheel are mounted in a rotatable manner in a housing that has a suction connection and a press... | 12/26/2000 |
| 6158994 | Grooved rotor for an internal gear pump A rotor for an internal gear pump adapted to improve the lubrication of the internal gear parts. A radial groove is added to the inner face of an internal rotor. The groove extends radially between the center of the rotor and an outer diameter of the roto... | 12/12/2000 |
| 6095782 | Crescentless internal gear pump A crescentless internal gear pump includes a housing with an intake connection and a pressure connection. An internally toothed internal gear has an outside surface and is disposed for rotation within the housing. Each tooth includes a head and a base, th... | 08/01/2000 |
| 6093006 | Non-crescent seal internal gear pump with sealing elements inserted in the tooth tips A non-crescent seal gear pump includes a housing with a pump chamber, a rotatable ring gear in the pump chamber having an outer periphery and internal toothing and an eccentric pinion with external toothing and rotatable in mesh with the rotatable ring ge... | 07/25/2000 |
| 5890885 | Filling member-less internal-gear pump having a sealed running ring A filling member-less internal-gear pump in which the annular gear (4) is received in a running ring (3) forming an annular gap (31), and rotates therewith. The annular gap (31) is subdivided into peripheral portions which can be sealed off relative to ea... | 04/06/1999 |
| 5685704 | Rotary gear pump having asymmetrical convex tooth profiles A rotary displacement pump having a rotatable gear rotor is disclosed, the gear rotor having an outer ring gear with a plurality of internal teeth engaging the external teeth on a pinion gear which is, in turn, attached to a rotatable shaft. The ring gear... | 11/11/1997 |
| 5582514 | Sickleless internal gear pump A sickleless internal gear pump with an internally toothed ring gear and a pinion meshing with the ring gear, the two fitted rotatably in a common casing. The ring gear includes radial conduits for the medium to be pumped and elements which are radially m... | 12/10/1996 |
| 5540573 | Sickleless internal gear pump having sealing elements in tooth heads The invention is directed to a sickleless internal gear pump with an internal ring gear and a pinion meshing with the ring gear. The ring gear has radial apertures for the medium being pumped, and sealing elements radially movably disposed in an appropria... | 07/30/1996 |
| 5451150 | Sickleless internal gear pump with cross-sectionally mushroom-shaped sealing elements inserted in the tooth head The invention relates to a sickleless internal gear pump with an internally toothed ring gear and a pinion meshing with the ring gear. The pinion and ring gear are rotatably mounted in a housing having a suction port and a pressure port. The ring gear inc... | 09/19/1995 |
| 5399079 | Sickleless internal gear pump with sealing elements inserted in the tooth heads The invention is directed to a sickleless internal gear pump including an internal ring gear and a pinion meshing with the ring gear. The internal ring gear and pinion having a common width and a plurality of teeth extending across the width. Each tooth h... | 03/21/1995 |
| 5373819 | Rotary piston machine and method of manufacturing piston The rotary piston (6) with rotation axis C performs a relative rotation in an annular cylinder (1) with rotation axis O which is displaced with respect to said piston axis (C) by an eccentricity e. The cylinder (1) comprises three chambers (2) having cyli... | 12/20/1994 |
| 5358393 | Internal axis single-rotation machine The radial cross sections of the three engagement parts of the external rr of an internal axis single-rotation machine are defined by outer and inner circular arcs. The shape of the internal rotor, having two engagement parts, is kinematically precisely ... | 10/25/1994 |
| 5354188 | Sickleless internal gear pump with radially movable sealing elements for radial compensation The invention relates to a sickleless internal gear pump with an internal ring gear and a pinion meshing with the ring gear. The ring gear and pinion are rotatably mounted in a common housing part having an axial expanse corresponding to the width of the ... | 10/11/1994 |
| 5242286 | Internal gear pump An internal gear pump is disclosed having at least two essentially identical internal gears and a pinion meshing with the internal gears, all being rotatably disposed in a housing, the axial dimension of which is substantially equal to the width of the ge... | 09/07/1993 |
| 5147194 | Rotary piston machine with a protuberance in the cylinder wall For improving the gap sealing between the circumferential surfaces of rot of a rotary piston machine and circular cylindrical inner surfaces (9) of the surrounding casing, rib-like protuberances (11) are displaced from the casing inner surfaces by cold w... | 09/15/1992 |
| 5135371 | Internal gear pump with radial openings A crescent-less internal gear pump. The internally geared wheel has a plurality of radial openings from its peripheral surface into the tooth gaps at the tooth base. The axial width of the pinion and/or the internally geared wheel is at least as great as ... | 08/04/1992 |
| 5044907 | Rotor device having inner rotor and driven outer rotor A rotor device includes a casing, an outer rotor positioned in the casing and rotatable about a first rotational axis, and an inner rotor positioned in the casing and rotatable about a second rotational axis. An outer sealing portion of the inner rotor de... | 09/03/1991 |
| 4948352 | Rotor unit with peripheral projections and clearances for centrifugal deflection A rotor unit comprises an inner rotor and an outer rotor having different number of teeth, with the inner and the outer rotor being mounted on eccentric shafts to be driven for rotation at different speeds. The volume efficiency is improved by producing a... | 08/14/1990 |
| 4943213 | Internal axis rotary piston machine with meshing engagement between outer and inner rotors An internal axis rotary piston machine containing in a housing (2), an outer rotor (26), with which an inner rotor (8) having n engagement parts (9) is in meshing engagement, there being n+1 recesses between engagement parts (34) of the outer rotor (26). ... | 07/24/1990 |
| 4850831 | Interengaging rotors having internal axes and specific sidewall construction The external rotor of a single-rotation machine has engagement spaces, whose boundary faces in the inward direction form a widening, which is adjacent in an outer region radial thereto to parallel surfaces or surfaces forming a widening in the outward dir... | 07/25/1989 |
| 4840550 | Internal axis rotary piston engine with protrusions having two sealing corners In a rotary piston engine which can be produced by simple manufacturing techniques and which has an outer and an inner rotor which rotate in a housing about different axes of rotation, wherein strip-like projections on inwardly extending engagement member... | 06/20/1989 |
| 4801255 | 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... | 01/31/1989 |
| 4795326 | Rotary piston machine having inner and outer rotors and a reinforcing belt A rotary piston machine has inner and outer rotors rotating at unequal speeds around eccentric axes, and the rotors are provided with angularly spaced profiled teeth and gaps which cooperate during rotation to define working chambers of varying volume whi... | 01/03/1989 |
| 4793781 | External and internal rotor machine having internal axes and circumferential reinforcement web The engagement parts of the external rotor of a single-rotation machine are interconnected in circumferential direction of the rotor by a ring-like web. This allows high rotational speeds around the single axis of rotation of the external rotor without an... | 12/27/1988 |
| 4772191 | Internally axed single-rotation machine with sealing gap arrangement For an improved sealing at the sealing gaps of a single-rotation machine having internal axes and accompanied by minimum frictionally losses, the width of the sealing gaps is made to differ in such a way that the narrower sealing gaps occur on the radiall... | 09/20/1988 |
| 4753584 | Single-rotation machine having internal and external rotors with axial cooling ducts for the external rotor The engagement parts of the external rotor of a single rotation are provided with at least one cooling air duct. The inflow takes place by an inflow duct provided in the casing side plate and which is surrounded by the antifriction bearing mounting the ex... | 06/28/1988 |
| 4735561 | Machine having plural fixed internal axes with reinforced rotor The engagement parts of the external rotor of a machine having plural fixed internal axes are reinforced by locking screws, which extend radially outwards to the side parts of the external rotor at an acute angle parallel to the longitudinal axis of said ... | 04/05/1988 |
| 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 |
| 4235217 | Rotary expansion and compression device A rotary gas expansion and compression device having a pair of rotors provided respectively with external and internal flutes differing in number by one, the form of which provides a continuous vertical contact. The rotors are meshed so that they form clo... | 11/25/1980 |
| 4028023 | Fluid operable rotary piston device A fluid operable rotary piston device having a housing with gas inlet and tlet means and a hollow cylinder rotatable therein having gas inlet and gas outlet ports which communicate with the gas inlet and outlet means during rotation of the cylinder. A rot... | 06/07/1977 |
