ALEXANDRIA, Va., April 21 -- United States Patent no. 12,607,174, issued on April 21, was assigned to HYDAC FLUIDTECHNIK GMBH.
"Pump device" was invented by Christian Groh (Gersheim, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a pump device comprising a pump piston (12) which is longitudinally movable in a pump housing (10) and which, controlled by a magnetic actuation apparatus (14), acts on an inlet valve (16) and an outlet valve (18), the inlet valve (16) opening during the intake stroke of the pump piston (12), and the outlet valve (18) opening during the delivery stroke thereof. The inlet valve (16) has an annular valve piston (20) which encompasses the pump housing (...