ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,491,540, issued on Dec. 9, was assigned to ZHEJIANG QIANJI INTELLIGENT TECHNOLOGY Co. LTD. (Zhejiang, China).
"Handheld cleaning machine" was invented by Keke Fu (Jinhua, China) and Jin Li (Jinhua, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A handheld cleaning machine, comprising: a housing, a reciprocating mechanism, a driving assembly, and a water pump assembly. The reciprocating mechanism comprises a reciprocating shaft, a sleeve, and a first guide assembly. The driving assembly is configured to drive the reciprocating shaft to rotate, so that the sleeve reciprocates in the length direction of the reciprocating shaft; the water pump assembly...