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:
Sep. 24, 2024
Filed:
Apr. 19, 2021
Caterpillar Sarl, Geneva, CH;
Hideki Nakajima, Akashi, JP;
Kazushi Yamada, Akashi, JP;
Caterpillar SARL, Geneva, CH;
Abstract
To achieve improvement of operability and reduction of energy loss, when controlling so that an upper limit pressure of a discharge line becomes a pressure corresponding to an manipulation tool manipulation amount by controlling an increase or decrease of a bypass amount, in a hydraulic control circuit equipped with a bypass valve for controlling a bypass amount flowing from a hydraulic pump to an oil tank. By using a bypass valve control map representing a relationship between a manipulation tool manipulation amount and a spool stroke, the spool stroke of a bypass valve is controlled, and an upper limit pressure of the discharge line is set so that an opening area of the bypass valve is fully closed by a manipulation amount which is larger than a manipulation tool manipulation amount at which the maximum pressure of the discharge line is reached.