Patent ID: 7597305

Claim:
A poppet valve device for opening and closing a high-pressure liquid passage, said poppet valve device comprising: a valve seat member; and a poppet valve body inserted in a through-hole of said valve seat member for sliding, wherein: said poppet valve device is configured such that positioning a seat face of said poppet valve body onto a seat face of said valve seat member separates an annular, high-pressure room from an annular, low-pressure room, said annular rooms being formed between said poppet valve body and said valve seat member; said annular high pressure room is located at an upstream side of said poppet valve body, and said annular low pressure room is located at a downstream side of said poppet valve body; said valve seat member includes an axial passage that communicates with said high-pressure room and a radial passage that communicates with said low-pressure room; an annular gap is formed between said seat face of said poppet valve body and said seat face of said valve seat member while said poppet valve device is opened, and said annular gap is formed along a periphery of said poppet valve body in a middle part thereof and is located at a downstream side of an outlet of said axial passage to make liquid flow toward said annular gap from said axial passage; said poppet valve body includes a central hollow for allowing the liquid to escape outside of said poppet valve body; and said axial passage comprises a plurality of passages of substantially the same diameter and length located adjacent to each other, and each of said passages extends in an axial direction relative to a center axis of said poppet valve device and is positioned circumferentially about said center axis.