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:
Nov. 27, 1990
Filed:
Mar. 16, 1990
Masateru Kabata, Osaka, JP;
Ikuo Igami, Tokyo, JP;
Mitsubishi Rayon Co., Ltd., Tokyo, JP;
Abstract
In a liquid directional control valve, a hollow rotary valve element is accommodated in a valve chamber for angular movement about a rotary axis of the rotary valve element. The rotary valve element has first, second and third openings. A liquid passageway formed by the rotary valve element is simple in construction. First seal elements are arranged about first, second and third outlet ports formed in the valve chamber and in close contact with an outer circumferential surface of the rotary valve element. A pair of circumferential grooves are provided respectively in outer circumferential surface sections of respective both ends of the rotary valve element. Each of the pair of grooves has a sloped bottom. A pair of second annular seal element are arranged respectively in the pair of circumferential grooves in concentric relation thereto.