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:
Oct. 07, 2014
Filed:
Jan. 27, 2012
Takeshi Fujiwara, Sagamihara, JP;
Masayuki Nakamura, Yamato, JP;
Takeshi Fujiwara, Sagamihara, JP;
Masayuki Nakamura, Yamato, JP;
Kayaba Industry Co., Ltd., Tokyo, JP;
Abstract
A control valve includes a signal pressure passage that transmits a pilot pressure of first and second pilot chambers as a signal pressure of another device, a connecting groove that is formed in a spool and connects the first pilot chamber to the signal pressure passage when the spool is in a neutral position, a connecting hole that is formed in the spool and connects the second pilot chamber to the signal pressure passage, and a check valve that is interposed in the connecting hole and permits a flow only from the second pilot chamber to the signal pressure passage. The connecting groove connects the first pilot chamber to the signal pressure passage when the pilot pressure is led into the first pilot chamber, and blocks communication between the first pilot chamber and the signal pressure passage when the pilot pressure is led into the second pilot chamber.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile