Liquid pumping system having means for detecting gas in the pump
First Claim
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1. Liquid pumping apparatus comprisinga pump for pumping a liquid;
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Abstract
An improved liquid pumping system wherein gas within the pump may be detected to indicate an error in desired flow rate or displaced volume. The system may be shut down if excessive gas is detected in the pump. Further, the flow rate may be corrected to the desired rate.
47 Citations
24 Claims
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1. Liquid pumping apparatus comprising
a pump for pumping a liquid; - and
gas detecting means disposed in the pump for detecting within said pump the presence of gas which may undesirably affect the liquid delivery rate of said pump where said gas detecting means senses the compressibility of the fluid within said pump to determine the presence of said gas where said gas is compressible and said liquid is not. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification