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:
Mar. 11, 1980
Filed:
Jan. 30, 1978
Toru Yamamoto, Gifu, JP;
Teijin Seiki Company Limited, Osaka, JP;
Abstract
A fail-safe fluid control valve comprises a first sleeve accommodated in and fixed to a valve housing, a second sleeve slidably received in the first sleeve, and a valve spool slidably received in the second sleeve. The first and second sleeves are properly formed with grooves and ports while the valve spool is properly formed with spaced large diameter portions. When there occurs such an abnormal condition that the valve spool is jammed or stuck to the second sleeve, the second sleeve is axially moved in unison with the valve spool by an input lever for actuating the fail-safe control valve under the same condition as a normal condition in which the valve spool is axially moved by the input lever.