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:
Dec. 03, 1991
Filed:
Oct. 10, 1990
Applicant:
Inventors:
Takao Kojima, Saitama, JP;
Yukimitsu Minamibata, Saitama, JP;
Assignee:
Jidosha Kiki Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B / ;
U.S. Cl.
CPC ...
251359 ; 13762521 ; 9137 / ;
Abstract
A valve sleeve is fitted around valve rotor to define a rotary valve. The valve sleeve is characterized by the configuration of axially extending grooves which are formed in its internal surface. Specifically, the axial groove has a bottom surface which includes a lengthwise portion having a constant depth. The bottom surface of the groove is connected to the wall surfaces which are located at the opposite lengthwise ends as well as with the opposite lateral side walls by arcuate surfaces. At least one of the wall surfaces which are located at the lengthwise ends has an angle of inclination which exceeds 60.degree..