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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0815176 (1991-12-31) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 47 인용 특허 : 0 |
An improved valve seat which significantly decreases the impact stress caused by the impact of a mud pump valve body against the valve seat. The valve seat comprises a generally cylindrical body portion with a sealing surface which is sloped from the outer surface of the cylindrical body portion tow
An improved valve system for use in pumps for handling abrasive fluids, comprising: a valve body, said valve body comprising a portion having a sloped surface for engaging a complementary sloped surface of a valve seat, said sloped portion of said valve body including a first portion comprising meta
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