HYDRAULIC ACTUATOR Russian patent published in 2012 - IPC F15B15/00 

FIELD: power industry.

SUBSTANCE: hydraulic actuator contains piston with rod located in housing and forming working cavities, end plates, multiple rolling-contact bearings of piston and rods, rolling elements of rolling-contact bearings of piston and rods made as helical springs and located in grooves along the whole perimetre of hydraulic actuator piston and rod; outer radius of each helical spring coil in rolling plane of hydraulic actuator is equal to cartridge radius for piston coupling and to infinity for rod coupling.

EFFECT: reliability improvement and operability assurance for hydraulic actuator.

5 dwg