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DIFFERENTIAL PRESSURE SENSITIVE VALVE SYSTEM FOR SELF-PRIMING LIQUID-TYPE PUMPS
US 3,481,274 A
Filed
: 12/18/1967
Issued
: 12/02/1969
Est. Priority Date
: 12/18/1967
Status: Expired due to Term
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Current Assignee
Primavac Systems Incorporated
Original Assignee
Pellegrino E. Napolitano
Inventors
Napolitano, Pellegrino E.
Application Number
US04/691,387
Time in Patent Office
715 Days
Field of Search
US Class Current
417/305
CPC Class Codes
F04D 9/005
by adducting or recycling l...
Y10T 137/2599
Venturi
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