The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 31, 2020
Filed:
Jul. 30, 2018
Mazda Motor Corporation, Aki-gun, Hiroshima, JP;
Yasuyuki Imano, Hiroshima, JP;
Masaki Fukuma, Hiroshima, JP;
Satoshi Imamura, Hiroshima, JP;
Hisashi Kajikawa, Aki-gun, JP;
Toshinobu Yoneya, Hiroshima, JP;
Ryoko Motohiro, Hiroshima, JP;
Yuichi Someno, Aki-gun, JP;
Takahiro Iwai, Hiroshima, JP;
Mazda Motor Corporation, Aki-gun, Hiroshima, JP;
Abstract
A counterweight forms a crankshaft of an engine, and includes: an arm connecting a crank journal and crank pin of the crankshaft; a neck extending from a first connection face of the arm in a direction opposite to the crank pin; and a substantially fan-shaped weight continuous with a portion of the neck opposite to the crank journal. The weight has left and right shoulders continuous with the neck, and each of the shoulders is tilted to be away from the neck at an angle with respect to a horizontal line orthogonal to a crankshaft center when viewed along the crankshaft center, the angle being 15° or more and 22.5° or less.