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. 22, 2003
Filed:
Mar. 29, 2001
Kinshiro Naito, Kanagawa 259-1116, JP;
Masayuki Shimizu, Kanagawa, JP;
Hideo Hara, Tokyo, JP;
Osamu Takahashi, Kanagawa, JP;
Other;
Abstract
In a rotary servo valve ( ) provided with at least two kinds of pump port ( ) for high and low pressures, a spool ( ) that is free to rotate and free to reciprocate linearly is installed into a spool guide hole ( ) of the valve main body ( ), a servo motor ( ) that rotates and drives the spool and a linear type actuator ( ) that reciprocatedly travels are disposed, and the pump ports are selectively changed over by the reciprocation of the spool, and cylinder ports are selectively changed over by the rotation and at the same time the flow rate is controlled.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile