Patent ID: 6796545
Filing Date: 2004-09-28
Classification: F16J,F16K

Abstract:
A poppet valve seat mechanism in which a valve seat is provided in a flow path, a valve body is allowed to move in a direction perpendicular to a valve seat surface of the valve body, thereby bringing the valve body into contact and away from the valve seat to open and close the flow path, the poppet valve seal mechanism comprising:an annular resilient seal member configured to seal between the valve body and the valve seat; and an annular groove provided in one of the valve seat and the valve body, wherein the annular seal member is mounted to the annular groove, the groove is formed such that a width of an opening of the groove is smaller than a maximum width inside of the groove, a cross-sectional area of the groove is smaller than a cross-sectional area of the seal member, a maximum width of a portion of said seal member accommodated in the groove is formed larger than a width of the opening of the groove, and said seal member fills the groove and projects from the opening of the groove when the seal member is brought into contact with an opposed seal surface under pressure.