发明授权
- 专利标题： Double diaphragm pressure switch for a well water system
- 专利标题（中）： 用于井水系统的双隔膜压力开关
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申请号： US242490申请日： 1988-09-12
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公开(公告)号： US4867645A公开(公告)日： 1989-09-19
- 发明人: Bailey G. Foster
- 申请人： Bailey G. Foster
- 专利权人： Foster Bailey G
- 当前专利权人： Foster Bailey G
- 主分类号： E21B43/12
- IPC分类号： E21B43/12 ; F04B47/00
摘要：
A switch mechanism for controlling a motor that runs a well pump. Water line pressure acts on a diaphragm to pressurize an air chamber that communicates with a pressure switch. The switch components are isolated from the water line (by the air chamber), to minimize the possiblity of switch failure due to ice formation (winter time operations) or corrosion.
公开/授权文献
- US5412047A Homoacrylate polymerization processes with oxonitroxides 公开/授权日：1995-05-02
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