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| Number | Title | Issue Date |
| 6439868 | Rotary engine A rotary engine having end plates attached to a rotor and moving therewith. A rotor has a plurality of blades reciprocally mounted therein and placed within a housing. A chamber is formed between the blades, the rotor, the end plates, and a cylindrical st... | 08/27/2002 |
| 5470215 | Wear resistant vane-type fluid power converter A fluid power converter, such as a vane-type hydraulic motor comprising a rotor circumferentially surrounded by a stator, the opposing peripheral surfaces thereof creating an annular space therebetween. The opposing surfaces of the rotor and stator each e... | 11/28/1995 |
| 4915600 | Rotary apparatus with rotating mobile and stationary blocking members A motor/pump includes a cylindrically shaped rotor journaled within a similarly shaped housing to define an annular fluid passageway therebetween. The annular passageway is divided into a plurality of discrete fluid chambers by mobile blocking members whi... | 04/10/1990 |
| 4817567 | Rotary piston engine A rotary piston engine having a pear-shaped piston with convex sides is mounted for rotation within a housing whose internal cross-section presents a symmetrical oval shape which is slightly constricted in the middle. The annulus between the piston and th... | 04/04/1989 |
| 4599058 | Vane slots for a fluid power converter In a fluid power converter, such as a hydraulic pump or motor, having a rotor and stator with vanes in both the rotor and stator, the improvement in the vane slots on one or both of the rotor and stator in which a ramp is provided on both sides of the ope... | 07/08/1986 |
| 4530174 | Drive for elevating mechanism The elevating mechanism for a scraper is driven directly and without any supplementary inertia mechanism or speed reducing mechanism by a hydraulic motor of a type having concentrically mounted rotating and stationary members, and with substantial numbers... | 07/23/1985 |
| 4507067 | Rotary device with elliptical rotor in elliptical chamber A rotary device has a housing with an elliptical inside surface surrounding an elliptical rotor. Vane and seal assemblies on the rotor and housing are controlled with cam and linkages to provide positive effective gas seals between the housing and rotor. ... | 03/26/1985 |
| 4055156 | Rotary engine An internal combustion engine of the rotary type having an elliptical housing within which charge-carrying pistons move. The engine includes a stationary central portion having an elliptical outer surface about which the pistons move. A pair of gate valve... | 10/25/1977 |
| 4012182 | Machines for energy conversion A machine for energy conversion includes a working chamber defined by two relatively movable parts and provided with inlets and outlets for the working medium, both parts having members serving as pistons and abutments which sealingly engage with the wall... | 03/15/1977 |
| 4008019 | Rotary pump with pivoted flap engaging a bladed rotor A displacement pump of the blade or vane type comprising a rotor with two blades, said rotor being eccentrically mounted in the casing of the pump. The rotor with its blades provides for a first pumping effect so as to transport material in first partial ... | 02/15/1977 |
| 3976407 | Fluid power converter side seal A fluid power converter having a rotor and stator rotatable with respect to one another about a common axis and having coacting sides in which an annular seal is positioned between the coacting sides for limiting fluid flow therethrough thereby providing ... | 08/24/1976 |
| 3957404 | Vanes for fluid power converter In a fluid power converter, such as a hydraulic pump or motor, having a rotor and stator with vanes in both the rotor and stator, the improvement in the vanes which are generally rectangular in cross section in which the outer edges of the vanes have a co... | 05/18/1976 |
