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| Number | Title | Issue Date |
| 7438543 | Oscillating slide machine The invention relates to an oscillating slide machine working on an eccentric circulatory motion, whereby the oscillation guide grooves (19) on the inner rotor (5) are provided with groove front edges (20) and groove rear edges (21) of di... | 10/21/2008 |
| 6976832 | Fluid rotary machine A fluid rotary machine (10) includes an inner housing (12) provided with a manifold (68) for directing working fluid through the machine (10) and an outer housing (14) coupled to the inner housing (12) so that the outer hous... | 12/20/2005 |
| 6607371 | Pneudraulic rotary pump and motor Expansible chamber apparatus for a positive displacement, high volume, low friction, reversible rotary pump for gases and/or liquids. Two or more chambers are provided, defined in part by one or more small abutments that move radially in a slot to switch ... | 08/19/2003 |
| 6152718 | Positive-displacement piston mechanism having a rotary piston structure A positive-displacement piston mechanism includes a small rotor integrated with a main axis and biased against a cylindrical large rotor for holding a bearing-housing. Slant sliding slots are formed at facing places in equally divided space between the la... | 11/28/2000 |
| 5026264 | Fluid compressor A fluid compressor includes a cylinder and a columnar rotary rod. The rod is arranged in the cylinder so as to extend in the axial direction thereof and be eccentric thereto, and orbitable relative to the cylinder without rotation with respect to the cyli... | 06/25/1991 |
| 4990074 | Oil pump having pivoting vanes The oil pump includes an air tight housing within which is rotatably fitted a circular ring and a driven shaft rotatably mounted in the housing, and within the ring, for rotation about an axis eccentric from, but substantially parallel to, the ring axis. ... | 02/05/1991 |
| 4772185 | Rotary vane pump having a plurality of inlet and outlet slots in a rotating sleeve A rotary vane vacuum pump assembly is disclosed which is characterized by the absence of the discharge of lubricating oil with the exhaust airstream, and which includes an internal stator and a surrounding rotor. Pivotal vanes are mounted on the interior ... | 09/20/1988 |
| 4456442 | Rotary expansible chamber device with eccentric rotor assembly including a flexible band A pump consisting in a rotor (3) realized like a housing, placed in an outer housing (2), inside the rotor a cylindrical element (6) coaxially connected thereto by means of an elastic band (23) forming lobate chambers (13,14) between the rotor and the cyl... | 06/26/1984 |
| 4443167 | Rotary fluid pump mechanism A fluid pump for pumping a fluid from an input conduit to an output conduit comprising a housing having a cup-shaped rotor assembly rotatably disposed within the housing. A vane ring assembly is slidably disposed within the rotor assembly. A protuberance ... | 04/17/1984 |
| 4384832 | Engine with counter-rotating rotors having hemicylindrical pistons A rotary engine having two opposite rotating rotors forming a substantial part of a toroidal chamber such that the toriodal chamber is parted into two lateral parts formed by an outer rotor having a disk-like part forming one side of the chamber and a lat... | 05/24/1983 |
