Pump apparatus and underwater trenching apparatus
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United States of America Patent
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Aug 1, 2017
Grant Date -
Dec 11, 2014
app pub date -
Dec 21, 2012
filing date -
Dec 22, 2011
priority date (Note) -
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Abstract
A pump apparatus comprises a primary pump having a relatively low pressure fluid input and a relatively high pressure fluid output and means, associated with said primary pump fluid input, operable where the ambient pressure is insufficient substantially to prevent cavitation in the primary pump, to locally increase the pressure at said primary pump fluid input.
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