Patent ID: 7360557
Filing Date: 2008-04-22
Classification: F16K,Y10T

Abstract:
1. A check valve, comprising: a valve housing that includes first and second housing portions, the first housing portion including an inlet and the second housing portion including an outlet, wherein the first and second housing portions include flared end fittings and the end fitting of the first housing portion has an internal diameter that is the check valve's orifice; a poppet valve received in the housing and adapted to move within the housing between an open position and a closed position; a valve guide received in the valve housing, the valve guide, the poppet valve and the valve housing cooperatively defining a variable volume pressure cavity and a fluid flow path, the valve guide adapted to provide the variable volume pressure cavity in communication with the fluid flow path; and a resiliently compressible member adapted to bias the poppet valve toward a closed position against a flow of fluid through the check valve and a low pressure force created in the variable volume pressure cavity by virtue of the fluid flow through the valve guide.