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:
Apr. 07, 2015
Filed:
Jun. 06, 2011
Applicants:
Yasuhiko Matsuki, Fujisawa, JP;
Masanori Minagawa, Tokyo, JP;
Inventors:
Yasuhiko Matsuki, Fujisawa, JP;
Masanori Minagawa, Tokyo, JP;
Assignee:
Komatsu Ltd., Minato-ku, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 9/00 (2006.01); H02K 1/32 (2006.01); H02K 5/20 (2006.01); H02K 9/19 (2006.01); H02K 9/26 (2006.01);
U.S. Cl.
CPC ...
H02K 9/26 (2013.01); H02K 1/32 (2013.01); H02K 5/20 (2013.01); H02K 9/19 (2013.01);
Abstract
A cooling circuit for an electric motor for a construction machine includes a circulation line that includes a shaft-side line disposed in a rotor shaft of the electric motor, a pump that supplies cooling fluid to the circulation line, a first filter disposed between the pump and the shaft-side line in the circulation line, a first bypass line that bypasses the first filter so as to connect an upstream side and a downstream side of the first filter, and a first relief valve disposed in the first bypass line.