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. 10, 2023
Filed:
Oct. 26, 2022
Caterpillar Sarl, Geneva, CH;
Isao Konishi, Akashi, JP;
Genta Mine, Akashi, JP;
Yuya Kanenawa, Akashi, JP;
Shinya Ohmura, Akashi, JP;
Sei Shimahara, Akashi, JP;
Kazuya Miyamori, Akashi, JP;
Caterpillar SARL, Geneva, CH;
Abstract
Problem to be solved: To provide a hydraulic circuit for the construction machine which enables to use the relief valve of low capacity in the work tool circuit. Solution: The hydraulic circuitfor a construction machine has: a hydraulic pumpof variable capacity, a work tooloperated by hydraulic oil delivered by the hydraulic pump, a work tool operating deviceto output a signal for operating the work tool, a control valveallowing the hydraulic pumpto supply the hydraulic oil to the work toolbased on the signal output from the work tool operating device, a tool's relief valveto release the hydraulic oil flowing between the control valveand the work tool, a pressure sensorto detect a pressure of hydraulic oil flowing into the work tool, and a controllerto reduce a delivery rate from the hydraulic pumpwhen the pressure detected by the pressure sensorexceeds a predetermined value.