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:
Jul. 02, 2019
Filed:
Dec. 02, 2016
Caterpillar Inc., Peoria, IL (US);
Pengfei Ma, Naperville, IL (US);
Aleksandar Egelja, Naperville, IL (US);
Justin Speichinger, Edwards, IL (US);
Shuhei Orimoto, Koube, JP;
Tetsuya Yoshino, Akashi, JP;
Hideki Nakajima, Peoria, IL (US);
Shogo Tada, Peoria, IL (US);
Aleem Junaidi, Peoria, IL (US);
Bryan Johnson, Montgomery, IL (US);
Matthew Beschorner, Plainfield, IL (US);
Caterpillar Inc., Deerfield, IL (US);
Abstract
A hydraulic system is disclosed. The hydraulic system may include a source of pressurized fluid; a tank; a hydraulic actuator including a first chamber and a second chamber; a first independent metering valve disposed between and fluidly connected to the source, the tank, and the first chamber of the hydraulic actuator; and a second independent metering valve disposed between and fluidly connected to the source, the tank, and the second chamber of the hydraulic actuator. Each of the first independent metering valve and the second independent metering valve may include a spool and a valve actuator disposed on one side of the spool. The valve actuator may include a push coil, a pull coil, and a force feedback mechanism configured to balance a force of the push coil and the pull coil.