![]() As an air pump, it pulls air by trapping it with meshing lobes against the outer side of the blower case and pushes air from the intake side to the exhaust side. ![]() The basic design was patented in 1860 by Philander Higley and Francis Marion Roots (hence the name) of Connersville, Indiana, as an air pump for mines, grain elevators, blast furnaces, and other industrial applications. ![]() The Roots device is a positive displacement pump, used as an air pump or fluid pump. ![]() Our novelty casting of the 6-71 GMC blower is based on a mechanical “air mover” design with an interesting history.
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