DOUBLE-SIDED ACTION HYDRAULIC CYLINDER FOR SUBSTANTIAL STROKES Russian patent published in 2007 - IPC F15B15/16 

FIELD: engineering of volumetric double-action hydraulic force engines.

SUBSTANCE: device contains, mounted in a profiled body with a lid: piston with rod and moveable barrel track support enveloping the piston and a part of the rod, drive limiters for the barrel and the piston. New feature is the addition of at least one coaxial hollow cylindrical insert to the barrel, which insert is rigidly connected to barrel and barrel track support, which support is made with possible movement relatively to the piston and the rod, while limiters of barrel drive are made in form of differently oriented shelves on the ends of cylindrical insert, which shelves are made with possible engagement with the piston and the barrel. Ratio of insert and barrel lengths is (0,5-1,0), and ratio of value of full hydraulic cylinder drive to length of its body within limits of drive and barrel length with track support is at least 0,72.

EFFECT: addition of steps of lesser length to barrel allows substantial strokes and prevents technological difficulties during processing of internal surfaces of hydraulic cylinder.

3 cl, 5 dwg