HYDRAULIC DRIVE POWER SOURCE Russian patent published in 2012 - IPC F04B49/00 F15B1/00 

FIELD: engines and pumps.

SUBSTANCE: invention relates to hydraulic automatic hardware, particularly, to displacement-type pressurised fluid sources and may be used in control hydroelectric drives of aircraft flying in rarefied atmosphere. Proposed power supply 1 comprises displacement-type pump 2 with rotor 3 arranged in housing 4 and coupled with drive shaft 5, feed and discharge lines 6, 7. Compensating pressurisation device is composed of bellow 8 secured on pump housing 4 to make chamber 9 communicated with inner volume of said housing 4 and that of hollow piston 10. Said bellow 8 is rigidly secured to housing 4 on one side and, on opposite side, it is secured to piston 10 fitted on housing 4 to make differential chamber 11 communicated with hydraulic line 6.

EFFECT: higher reliability, expanded operating performances, smaller overall dimensions and simplified design.

4 cl, 2 dwg