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:
Jul. 14, 2020
Filed:
Dec. 26, 2017
Hitachi Construction Machinery Co., Ltd., Taito-ku, Tokyo, JP;
Hitoshi Nishiguchi, Tsuchiura, JP;
Hidefumi Hiramatsu, Kasumigaura, JP;
Tsuyoshi Onozaki, Tsukuba, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A bypass line () having one end side connected to a pilot delivery line () between a pilot pump () and a throttle () and the other end side connected to the pilot delivery line () between a check valve () and a pressure reducing valve type pilot valve () so as to bypass the throttle (), a gate lock valve (), and the check valve () provided in order from a pilot pump () is provided in the pilot delivery line (). A lock switching valve () shutting down a flow of a pilot pressure oil from the pilot pump () through the bypass line () at a normal time and allowing the flow of the pilot pressure oil through the bypass line () when a pressure generated in the pilot delivery line () exceeds a predetermined pressure between the gate lock valve () and the check valve () is provided in the bypass line ().
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile