发明名称 |
Methods and systems for detecting the presence of a gas in a pump and preventing a gas from being pumped from a pump |
摘要 |
A method and system are disclosed for detecting the presence of a gas in a pump chamber of a pumping system. The methods, and systems employing the methods, involve isolating a pump chamber from its surroundings, for example by closing an inlet and outlet valve on lines to and from the chamber, and determining the volume of the pump chamber with a force applied to a moveable or flexible surface of the pump chamber. The volume of the pump chamber is then redetermined in a similar fashion but with a second, different level of force applied to the surface of the pump chamber. The volumes thus determined can then be compared to detect the presence of a gas in the pump chamber.
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申请公布号 |
US6302653(B1) |
申请公布日期 |
2001.10.16 |
申请号 |
US19990357615 |
申请日期 |
1999.07.20 |
申请人 |
DEKA PRODUCTS LIMITED PARTNERSHIP |
发明人 |
BRYANT ROBERT J.;GRAY LAWRENCE B.;SPENCER GEOFF P. |
分类号 |
F04B51/00;(IPC1-7):F04B9/08;F04B43/06 |
主分类号 |
F04B51/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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