发明授权
US4832575A Automatic test system for check valve closure in pump for liquid
chromatography system
失效
用于液相色谱系统的泵中止回阀的自动测试系统
- 专利标题： Automatic test system for check valve closure in pump for liquid chromatography system
- 专利标题（中）： 用于液相色谱系统的泵中止回阀的自动测试系统
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申请号： US142572申请日： 1988-01-11
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公开(公告)号： US4832575A公开(公告)日： 1989-05-23
- 发明人: Les A. Miller , Shahin Tabanfar , Chih-Hua Chung
- 申请人： Les A. Miller , Shahin Tabanfar , Chih-Hua Chung
- 申请人地址： CA San Jose
- 专利权人： Spectra Physics
- 当前专利权人： Spectra Physics
- 当前专利权人地址： CA San Jose
- 主分类号： F04B49/06
- IPC分类号： F04B49/06 ; F04B51/00 ; G01N30/32
摘要：
There is disclosed herein a pump check valve test system embodied in a pump control system which control pump speed based upon actual pressure and upon actual pump speed and desired flow rate. The check valve test system disables the portion of the control system which controls pump speed based upon desired flow rate during the test. The test is comprised of timing the time it takes the pump to rotate through the portion of each cycle wherein the check valve is supposed to close and comparing this time to a known value.
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