Pumping system
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United States of America Patent
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Mar 29, 1988
Grant Date -
N/A
app pub date -
Dec 5, 1986
filing date -
Dec 5, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A pumping system employing a main pump and a high pressure centrifugal pump both of which are driven by an engine through a suitable drive is provided with an air clutch device whereby air is selectively introduced into the inlet of the high pressure centrifugal pump to cause air binding of the impellers, this action causing a de-clutching of the high pressure pump by a simple hydraulic action.
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