HYDRAULIC CYLINDER Russian patent published in 2001 - IPC

FIELD: manufacture of blanks by extrusion and thermoplastic method; delivery of mandrel to hole of mold for forming closed space supplying high pressure from 1.5 to 2.5 MPa. SUBSTANCE: hydraulic cylinder has sectional body with sleeve, working rod and end blanks fitted with threaded members for bypassing and keeping the liquid, as well as for rigid statically determined relative connection of coaxial members, flexible collars inclusive; sleeve is rigidly connected with end blanks by means of threaded members fitted with spring washers and nuts. Members having facets for wrench are rigidly secured on surface; maximum stroke of hydraulic cylinder rod depends on positions of end zones of holes in molds used for manufacture of articles on one side or on opposite side of mold (not shown); maximum number of spring washers and nuts may be equal to double number of coaxial and opposite members ensuring reliable and smooth securing of end faces of sleeve and end faces of blanks engageable with it. EFFECT: enhanced reliability. 1 dwg