Patent ID: 6223773
Filing Date: 2001-05-01
Classification: A01B,F15B,Y10T

Abstract:
A check valve assembly in a poppet valve design comprising a main poppet designed to include a pilot hole and biased against a valve seat, which may be raised from said valve seat so as to control open an open cross-section determined by a ring gap between the valve seat and the outer diameter of said main poppet, wherein a pilot hole closing body of said main poppet may be taken into its open position by means of a topping piston, wherein said topping piston may be taken into contact with said main poppet for the purpose of release, so that the opening stroke thereof is determined by the stroke of said topping piston, and wherein the diameter of the valve seat is about equal to the diameter of the main poppet on the seat side, so that the differential area effective in the opening direction is minimum at the raised main poppet.