ALEXANDRIA, Va., May 19 -- United States Patent no. 12,629,709, issued on May 19, was assigned to Obrist Closures Switzerland GmbH (Reinach, Switzerland).
"Trigger pump dispenser" was invented by Patrick Schmidt (Zell-Kaimt, Germany), Christian Wilhelms (Blankenrath, Germany) and Klaus Natersky (Grenderich, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A trigger pump dispenser (10) comprising: a body (20); an outlet nozzle (35); a pump chamber (190); a piston (25) for defining a variable volume in the pump chamber (190) and movable between a retracted position of larger chamber volume and an inserted position of lesser chamber volume; a trigger (60) coupled with the piston (25) and movable from a st...