ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,533,697, issued on Jan. 27, was assigned to GUANGZHOU LICHUANG PACKAGING Co. LTD (Guangzhou, China).
"Press liquid pump" was invented by Li Ma (Guangzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A press liquid pump includes an outer pipe and an inner pipe disposed in the outer pipe. A vacuum pump head is disposed on the outer pipe. A liquid outlet pipe of the vacuum pump head is disposed outside the outer pipe. A pressing portion of the vacuum pump head is disposed in the outer pipe. A first opening is defined in the outer pipe. A first end of the inner pipe is closed, and a second end of the inner pipe defines a second opening. When the in...