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:
May. 07, 2019
Filed:
Feb. 05, 2015
Nabtesco Corporation, Tokyo, JP;
Hitoshi Iwasaki, Kobe, JP;
NABTESCO CORPORATION, Tokyo, JP;
Abstract
Cost for a direction switching valve (third direction switching valve) is reduced while oil is supplied from two pumps to one actuator (third actuator). A hydraulic circuitfor construction machinery includes a first unloading passageconnected with a first pump, a second unloading passageconnected with a second pump, a first supply passageconnected with the first pump, a second supply passageconnected with the second pump, a third supply passage, and third direction switching valves (E andF). The third supply passageis connected with the first supply passageand the second supply passage. The third direction switching valves are connected with the third supply passage, the first unloading passage, the second unloading passage, and the tank passage, and supply and discharge oil to and from the third actuators (E andF).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile