US Patent Issued to Graco Minnesota on March 18 for "Drive system for a positive displacement pump" (Minnesota Inventors)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,071, issued on March 18, was assigned to Graco Minnesota Inc. (Minneapolis).

"Drive system for a positive displacement pump" was invented by Bradley H. Hines (Andover, Minn.), Brian W. Koehn (Minneapolis), Jeffrey A. Earles (Lakeville, Minn.), Paul W. Scheierl (Circle Pines, Minn.) and Adam K. Collins (Brooklyn Park, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A drive system for a pump includes a housing and a fluid displacer and a reciprocator configured to mechanically displace the fluid displacer through respective suction strokes. The housing and fluid displacer define an internal pressure chamber configured to be filled with a working...