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:
Aug. 07, 1990
Filed:
Apr. 28, 1989
Masatoshi Teranishi, Aichi, JP;
Noboru Hara, Aichi, JP;
Katsumi Tachi, Aichi, JP;
Hisayasu Sugita, Aichi, JP;
Toyoda Gosei Co., Ltd., Nishikasugai, JP;
Abstract
In a mixing head for mixing plural kinds of liquid materials, a first forward movement passage for opening a discharge control valve which control supplying the liquid materials into a mixing chamber, is ramified from a second forward movement passage for closing a circulation control valve which controls the circulation of the liquid materials, and extends across a spool of the circulation control valve. The spool is provided with a groove for opening the first forward movement passage when the circulation control valve is in a closed state. Further, a restriction passage having a check valve for keeping a working fluid from flowing into a first cylinder including a first piston of the discharge control valve, is formed to be communicated with the first cylinder at a side of the first forward movement passage and is ramified from the second forward movement passage.