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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.:

US 12729511 B1

PDFFull Text
Date of Patent:
Sep. 08, 2026

Filed:

Sep. 19, 2024

Electric working machine

Applicant:

Kubota Corporation, Osaka, JP;

Inventors:

Takuma Sai, Sakai, JP;

Kiyoshi Matsui, Sakai, JP;

Junki Ito, Sakai, JP;

Assignee:

KUBOTA CORPORATION, Osaka, JP;

Attorney:

Keating & Bennett, LLP

Primary Examiner:

Sihar A Karwan

Int. Cl.
CPC ...
E02F 9/20 (2006.01); B60L 1/00 (2006.01); E02F 9/22 (2006.01); E02F 9/26 (2006.01); F15B 19/00 (2006.01); H02P 23/20 (2016.01);
U.S. Cl.
CPC ...
E02F 9/207 (2013.01); B60L 1/003 (2013.01); E02F 9/2004 (2013.01); E02F 9/2203 (2013.01); E02F 9/26 (2013.01); F15B 19/00 (2013.01); H02P 23/20 (2016.02); B60L 2200/40 (2013.01); B60L 2240/36 (2013.01); B60L 2240/421 (2013.01); B60L 2240/52 (2013.01); B60L 2250/00 (2013.01); E02F 9/2285 (2013.01); E02F 9/2292 (2013.01);
Abstract

An electric working machine includes an electric motor to use electric power received from a battery via an inverter to drive a hydraulic pump to deliver hydraulic fluid to actuate a hydraulic device. A controller to control driving of the inverter and the electric motor is configured or programmed to gradually increase a rotation speed of the electric motor such that the rotation speed of the electric motor reaches a target rotation speed in a longer time when the electric motor is started in a state in which a temperature of hydraulic fluid detected by a fluid temperature detector is lower than or equal to a predetermined temperature than when the electric motor is started in a state in which the temperature of hydraulic fluid is higher than the predetermined temperature.

Find Patent Forward Citations

Sai, Takuma. (2026). Electric working machine (U.S. Patent No. 12729511). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12729511

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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