A rotary fluid machine, such as a pump or motor, is provided with a fluid flow control mechanism that allows the flow of fluid to be easily and precisely controlled. The device has a housing with a spherical interior in which primary and secondary vanes rotate, with the secondary vane reciprocating between...http://www.google.es/patents/US7214045?utm_source=gb-gplus-sharePatente US7214045 - Spherical fluid machine with flow control mechanism
Spherical fluid machine with flow control mechanism
