ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,492,694, issued on Dec. 9, was assigned to Casella Holdings Ltd. (Great Britain).
"Personal air sampling pump assembly" was invented by Brandon Trainer (Bedford, Great Britain), Steve Tearle (Bedford, Great Britain) and Aamir Qureshi (Bedford, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "An air sampling pump includes a reciprocating piston for operating a diaphragm assembly. The diaphragm includes a valve head including a fluid inlet and a fluid outlet and a fluid chamber defining a fluid path between the inlet and outlet. A diaphragm sealing engages the valve head and encloses the fluid chamber. The diaphragm includes a piston diaphragm ...