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:
Feb. 16, 2021
Filed:
Oct. 19, 2018
Komatsu Ltd., Tokyo, JP;
Yuusuke Miyamoto, Tokyo, JP;
Yuichi Hishinuma, Tokyo, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
A hydraulic circuit includes: a direction switching valve, which is in a state where a bottom oil path is connected to a first tank oil path and where a bypass oil path is connected to a second tank oil path when a pump oil path is connected to a rod oil path and when the rod oil path is connected to the bypass oil path when the pump oil path is connected to the bottom oil path, and a pilot operation control valve which allows flows of oil in both directions between the direction switching valve and the bottom oil path when the pump oil path is connected to the rod oil path and allows only a flow of oil from the direction switching valve to the bottom oil path when the pump oil path is connected to the bottom oil path by the direction switching valve.