ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,900, issued on Nov. 18.
"High volume, low pressure oilless pump" was invented by John Craig Colborn (Magnolia, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "A motor and pumping system which provides for high volume, low pressure, low cost, and ease of assembly as a breathing air supply such as for a submerged diver. The integration of the necessary elements gives rise to a unique ability to eliminate costly and complex motor bearings and simplify the motor design by reducing number of magnetic poles and electrical control elements which would traditionally be required to control the multiple poles of an electromechanical machine."
The patent...