| 摘要 |
PROBLEM TO BE SOLVED: To prevent a suction valve and a discharge valve from being adhered to a valve plate (to improve releasability) and to prevent airtightness from being lowered. SOLUTION: This valve device includes the suction valve, the discharge valve and the valve plate coated with a resin in such a manner that an suction hole and a discharge hole are each formed to become a non-circular hole. Thus, worn positions of the resin coating parts of the suction valve and the discharge valve are dispersed into a plurality. In this manner, a non-adhesiveness of the resin which can leave a resin coating layer for a long period of time can be utilized, and the airtightness can be prevented from being lowered. COPYRIGHT: (C)2005,JPO&NCIPI
|
