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3918843
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Patent Grant
3918843
References
Source
Patent Number
3,918,843
Date Filed
Not available
Date Issued
Tuesday, November 11, 1975
49 years ago
CPC
F04B49/106 - Responsive to pumped volume
E21B47/0008 - Survey of walking-beam pump systems
F04B47/02 - the driving mechanisms being situated at ground level
F04B49/02 - Stopping, starting, unloading or idling control
F04B49/065 - and making use of computers
F04B2201/02071 - Total number of pumping strokes
F04B2205/13 - Pressure pulsations after the pump
F04B2205/16 - Opening or closing of a valve in a circuit
US Classifications
417 - Pumps
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