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:
Oct. 06, 2026
Filed:
Aug. 03, 2023
Komatsu Ltd., Tokyo, JP;
Masato Kageyama, Tokyo, JP;
Jun Nabata, Tokyo, JP;
KOMATSU LTD., Tokyo, JP;
Abstract
Provided is a power feeding unit mounted on a swivel joint, the power feeding unit including: a rotary transformer that is coupled to an upper swing body and a lower traveling body of a work vehicle, respectively; an oscillation circuit that is coupled to the upper swing body, converts electric power into an alternating current, and supplies the alternating current to the rotary transformer; and a smoothing circuit that is coupled to the lower traveling body and converts electric power output from the rotary transformer into a direct current, in which an electrode on a negative side of the smoothing circuit is electrically coupled to a housing of the lower traveling body, and an electrode on a positive side of the smoothing circuit is taken out from a lower portion of the swivel joint via a cable inserted through a pipe provided inside the swivel joint along an axial direction.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile