Pump-Piston.
Description:
Patent for an improved pump piston used to pump oil from deep wells. The main improvement in this piston is that it is less susceptible to damage from sand or sediment by keeping sediment out of the piston valve, thus preventing it from accruing any long term damage that may render the piston irreparable. This design is also capable of fixing any wear due to sand or grit without removing the piston from the well.
Date:
May 4, 1920
Creator:
Coulson, William J.
Item Type:
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Patent
Partner:
UNT Libraries Government Documents Department