ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,544,902, issued on Feb. 10, was assigned to PANASONIC HOLDINGS Corp. (Osaka, Japan).
"Electric tool" was invented by Hidenori Shimizu (Shiga, Japan), Shinji Seko (Mie, Japan) and Takashi Kusagawa (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electric tool includes an output shaft, a drive shaft, a transmission mechanism, a plurality of bearings, and a seal member. The plurality of bearings are aligned in an axial direction of the output shaft and rotatably support the output shaft. The seal member has a through hole into which the output shaft is inserted. The seal member is disposed, in at least one space of spaces each sandwiched bet...