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:
Sep. 26, 1989
Filed:
May. 12, 1988
Kamimura Toshio, Gifu, JP;
Ito Koji, Gifu, JP;
Teijin Seiki Co., Ltd., Osaka, JP;
Abstract
A back pressure valve accumulates therein a predetermined amount of fluid having pressure higher than a predetermined level. The back pressure valve comprises a casing having a chamber formed therein, which chamber is communicating with an inlet port and an outlet port, a piston which is slidably installed in the casing, an elastic member which urges the piston toward the inlet port, and a relief valve which opens when pressure in the chamber exceeds a predetermined pressure level so as to permit flow of fluid from the inlet port to the outlet port. The back pressure valve further comprises a cylindrical piston which is slidably inserted between an outer periphery of the piston and an inner periphery of the casing, and an outer elastic member which urges the cylindrical piston toward the inlet port. The back pressure valve minimizes occurrence of trouble due to clogging of contaminations though it is simple in construction and inexpensive.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile