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:
Aug. 09, 2011
Filed:
May. 17, 2006
Yoshiaki Itakura, Hiratsuka, JP;
Masahiko Hoshiya, Hiratsuka, JP;
Yuki Yokoyama, Oyama, JP;
Junsei Tanaka, Hirakata, JP;
Yoshiaki Itakura, Hiratsuka, JP;
Masahiko Hoshiya, Hiratsuka, JP;
Yuki Yokoyama, Oyama, JP;
Junsei Tanaka, Hirakata, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
A hydraulic control device of construction machinery is disclosed. The device includes a main merging/diverging valve, operating levers operated to actuate plural actuators, an operating condition judging section, and a pattern collating section. When a load pressure of each actuator is high, a discharge pressure of each discharge oil path is also high, and when a total of the discharge pressures exceeds a predetermined set pressure, the main merging/diverging valve is switched to a diverging position, and when the total of the discharge pressures drops to below the set pressure, the main merging/diverging valve is switched to the merging position.