HYDROPNEUMATIC SET Russian patent published in 2007 - IPC F01C1/20 F01C11/00 

FIELD: mechanical engineering.

SUBSTANCE: invention can be used in transport, power engineering and any other industry. Proposed hydropneumatic set consists of several stages divided by partition into two phase-shifted similar sections in which rotors with cavities and rotors with bosses rotate, and it is furnished with main lines to supply and let out working medium. Ring channels with break whose angle is equal to angle of "dead» are arranged in partitions. Channels are made in rotors with bosses communicating space of section with ring channel. One of stages is main one others are additional ones. Which are provided, besides working line, with bypass line, both lines passing through two-position change-over switch which holds working line open in one position and bypass line closed, and vise versa in other position.

EFFECT: increased efficiency of hydropneumatic set.