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| Number | Title | Issue Date |
| 7695261 | Floating dam positive displacement pump A positive displacement pump having a centrally disposed rotor within a housing, the rotor having inwardly and outwardly moving vanes for movement of fluid through the pump. Races in end walls of the housing partly or entirely control movement of the vanes. A dam is... | 04/13/2010 |
| 6808374 | Sanitary design gear pump A sanitary pump with gear shaft bearing blocks in opposed cylindrical portions of a pump body bore, blocks constituting hand removable structural pump ends. Gear shaft bearings extending completely through blocks for easy cleaning, sealed by O-rings and clamp plates... | 10/26/2004 |
| 5609479 | Forced compression type pump A forced compression type pump including a cylindrically shaped pump case, an eccentric rotating body shaft-supported on said pump case at an eccentric position relative to said pump case and a compressing and forcibly sending member movable in a radial d... | 03/11/1997 |
| 5385458 | Vane-type rotary compressor An improved vane-type rotary compressor includes a rotor which is constructed by four similar plates having evenly spaced slots and containing three sets of links with hooks and pistons in their central sleeves, and four vanes which are engaged with the h... | 01/31/1995 |
| 5339780 | Centrifugal device for rotary engine A novel centrifugal device that attaches to multiple rotating cross-vanes in a rotary engine so as to offset the effects of centrifugal forces on the cross-vanes and thereby reduce seal element wear on the cross-vanes. The device consists of two clevis ar... | 08/23/1994 |
| 5304049 | Frictionless rotary pump-motor-meter A rotary pump-motor-meter comprises a rotor assembly including a shaft (38) and one or more hub members (37) coaxially affixed to the shaft, that supports a plurality of flaps (40) disposed about the shaft (38), each of which flaps has a round first edge ... | 04/19/1994 |
| 5181490 | Rotary engine A rotary internal combustion engine including a housing dividing a substantially circular rotor chamber and a drive shaft extending through this chamber. A circular rotor is mounted in the chamber on the drive shaft and has a diameter less than the diamet... | 01/26/1993 |
| 5181843 | Internally constrained vane compressor The present invention relates to an internally constrained vane rotary compressor employing a floating carrier ring, containing a plurality of non-continuous cam surfaces to guide a corresponding plurality of vanes about the interior of a stator, resultin... | 01/26/1993 |
| 5169299 | Rotary vane compressor with reduced pressure on the inner vane tips In a rotary vane hermetic compressor an improved loading structure is provided for the vanes. A pressure reducing means incorporated into the compressor rotor reduces the frictional loading of the vane tips against the compressor walls. A passageway vents... | 12/08/1992 |
| 5167497 | Vane control unit for vane pump A vane control unit for a vane pump having reversible control, the pump having a rotor, a rotor shaft and a vane control unit including vane thrusters inserted into housings arranged in the rotor shaft and designed to control the movement of the vanes out... | 12/01/1992 |
| 5033946 | Rotary vane machine with back pressure regulation on vanes A rotary machine includes a stationary housing having a rotor chamber and a rotor rotatably mounted in the rotor chamber, the inner peripheral surface of the rotor chamber having a central axis which is eccentrically disposed relative to the axis of rotat... | 07/23/1991 |
| 5032070 | Rotary machine having axially biased ring for limiting radial vane movement A rotary machine includes a housing having a rotor chamber and a rotor rotatably mounted in the rotor chamber. The rotor has longitudinal ends and a plurality of generally radially disposed vane slots extending between the longitudinal ends. A plurality o... | 07/16/1991 |
| 5022842 | Vane pump with rotatable annular ring means to control vane extension A vane pump in which a projection is provided on the end of a vane which radially slides as a rotor rotates, and an annular race concentric with an inner peripheral surface of a housing is provided in the inner surface of the end wall of the housing, the ... | 06/11/1991 |
| 5002473 | Vane pump with annular ring and cylindrical slide as vane guide A vane pump in which a projection is provided on the end of a vane which radially slides as a rotor rotates, and an annular race concentric with an inner peripheral surface of a housing is provided in the inner surface of the end wall of the housing, the ... | 03/26/1991 |
| 4998868 | Vane pump with sliding members on axial vane projections A vane pump in which a projection is provided on the end of a vane which radially slides as a rotor rotates, and an annular race concentric with an inner peripheral surface of a housing is provided in the inner surface of the end wall of the housing, the ... | 03/12/1991 |
| 4997351 | Rotary machine having vanes with embedded reinforcement A vane pump in which a projection is provided on the end of a vane which radially slides as a rotor rotates, and an annular race concentric with an inner peripheral surface of a housing is provided in the inner surface of the end wall of the housing, the ... | 03/05/1991 |
| 4958995 | Vane pump with annular recesses to control vane extension A vane pump in which a projection is provided on the end of a vane which radially slides as a rotor rotates, and an annular race concentric with an inner peripheral surface of a housing is provided in the inner surface of the end wall of the housing, the ... | 09/25/1990 |
| 4955985 | Vane pump with annular ring for engaging vanes and drive means in which the rotor drives the annular ring A vane pump in which a projection is provided on the end of a vane which radially slides as a rotor rotates, and an annular race concentric with an inner peripheral surface of a housing is provided in the inner surface of the end wall of the housing, the ... | 09/11/1990 |
| 4938671 | Rotary roller pump with complementary ribs and grooves between housing, rotor and rollers A rotary pump having an eccentric rotor disposed in a cylindrical housing is provided with a pair of cylindrical roller pistons disposed in opposed recesses in the rotor for rolling engagement with the internal surface of the housing. A pair of bearing ri... | 07/03/1990 |
| 4898526 | Vane pump with axial inlet and peripheral tangential outlet A vane pump comprising an intake port for sucking air into the pump, the intake port being extended axially with respect to a housing having an approximately cylindrical shape, and an outlet port for discharging air, the outlet port being extended from th... | 02/06/1990 |
| 4830593 | Pump with vane actuating system A sliding vane positive displacement pump with a spring biased mechanical vane acutating system. The pump includes a case having an inlet and an outlet with a liner having a cam-shaped inner surface eccentrically disposed therein. A rotor having radially ... | 05/16/1989 |
| 4799867 | Vane pump with brittle vanes and rough finished housing surface A vane pump in which an engaging portion in engagement with vanes to restrain the protrusion of the vanes to a given amount is provided on the inner surface of an end wall of a housing, the vanes being made of a material having a relatively high brittlene... | 01/24/1989 |
| 4659298 | Pump with vane actuating system A sliding vane positive displacement pump with a spring biased mechanical vane actuating system. The pump includes a case having an inlet and an outlet with a liner having a cam-shaped inner surface eccentrically disposed therein. A rotor having radially ... | 04/21/1987 |
| 4558998 | Variable capacity type vane pump with balancing groove in the cam ring In a vane pump having a casing, an annular rotor rotatably disposed in the casing, a plurality of vanes longitudinally movably carried by the rotor, and a cam ring eccentrically disposed about the rotor with its cylindrical inner surface slidably contacti... | 12/17/1985 |
| 4541791 | Vaned hydraulic system A vane pump has a housing comprising a pump cover and a pump housing. The pump cover is integrally formed with a hollow fixed shaft projecting therefrom and inserted loosely into a longitudinal hole of the pump housing. Received in the housing are a cam r... | 09/17/1985 |
| 4466783 | Three vane, two lobe fluid motor A hollow housing is provided having opposite ends and defining a cavity within the housing including two slightly greater than one-half cylindrical portions opening toward and into each other and defining a pair of opposite lobes projecting inwardly of op... | 08/21/1984 |
| 4449899 | Rotary vane machine A rotary vane machine includes a stator housing having an inner surface defining a stator chamber and inlet and outlet ports, a substantially cylindrical rotor rotatably mounted within the chamber, a crank axle rotatably mounted within the chamber and inc... | 05/22/1984 |
| 4385873 | Rotary vane type pump or motor and the like with circular chamber portions A rotary vane type motor, compressor or pump in which an eccentrically mounted rotor having sliding vanes rotates within a stationary main housing or stator. The stator is in turn defined by a pair of opposed shells, each shell essentially being a half cy... | 05/31/1983 |
| 4212603 | Rotary vane machine with cam follower retaining means A rotary machine includes a stator housing having an inner surface defining a stator chamber. The housing further defines inlet and outlet ports through the housing into the chamber. A substantially cylindrical rotor is rotatably mounted within the chambe... | 07/15/1980 |
| 4044596 | Volumetric meter This volumetric meter comprises a case with at least one inlet orifice and at least one outlet orifice interconnected by a circular passage concentric to an annular member rotatably mounted therein and provided with collapsible spaced peripheral vanes so ... | 08/30/1977 |
| 4019841 | Yoke mechanism for fluid displacement device A yoke mechanism for supporting a plurality of orbitable vanes includes two pair of identical yoke members to which the vanes are pivotally connected for self adjustment of the vanes within the associated fluid chamber.... | 04/26/1977 |
