| 摘要 |
PURPOSE:To reduce discharge port volume in such a way that a flange part of a bearing and a journal part are integrally formed, and a thin valve seat which is made separately from them, which are sealed and fixed into a joining hole which is provided at the flange part of the bearing. CONSTITUTION:The body 12 of a bearing is integrally formed with a journal part 12a and a flange part 12b, and a seat 13 is integrally formed with a discharge port 13a, a ring-shaped seat 13b, a valve joining face 13c, a valve tightening screw hole 13d, a valve relief part 13e, etc. This offers an advantage that any of them have no relation to the thickness of the flange part 12b, the valve seat 13 can freely select its thickness, so that the purpose of reducing the discharge port volume by means of conventional manufacturing method can be adequately attained. |
