US Patent Issued to HITACHI CONSTRUCTION MACHINERY on March 18 for "Abnormality diagnosis device for planetary gear speed reducer and construction machine" (Japanese Inventors)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,252,872, issued on March 18, was assigned to HITACHI CONSTRUCTION MACHINERY Co. LTD. (Tokyo).

"Abnormality diagnosis device for planetary gear speed reducer and construction machine" was invented by Motoki Sato (Tokyo), Makoto Henmi (Tokyo), Masahiko Ono (Tokyo), Hayato Masuda (Ibaraki, Japan), Shinichi Sekido (Ibaraki, Japan), Tomoharu Morita (Ibaraki, Japan) and Tatsuya Ono (Ibaraki, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An abnormality diagnosis device for a planetary gear speed reducer includes a second vibration sensor attached to a housing of a hydraulic motor having an output shaft coupled to the planetary gear speed reducer. A con...