AIR CUSHION WITH HYDRAULIC HOLDER Russian patent published in 1997 - IPC

FIELD: plastic metal working, particularly, manufacture of press-forging machines. SUBSTANCE: air cushion has slider and plunger. Hydraulic holder in the form of cylinder is located coaxially to plunger. Cylinder piston has recesses on the end face facing rod end. Recesses form two circular projections. Arranged between circular protrusions are through axial holes communicating rod and head ends. Circular plate mounted on the rod acts as check valve. Circular plate has recess and through axial holes and moves in axial direction. EFFECT: higher efficiency. 1 dwg