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. 29, 1988
Filed:
May. 30, 1986
Naoyuki Kotake, Tokyo, JP;
Toshio Mikiya, Tokyo, JP;
Nitto Kohki Co., Ltd, Tokyo, JP;
Abstract
A tube coupling having a socket and a plug, each having a fluid flow passage extending therethrough, and a valve mounted in the flow passage of at least one of the socket and plug for axial movement between a first position for closing the flow passage and a second position for opening the flow passage said valve being normally biased towards the first position by a spring when the socket and plug are disconnected, and moved to the second position when the socket and plug are coupled together, characterized in that at least those portions of the socket and plug which will be exposed to fluid during the use are formed of fluorocarbon resin, the spring being disposed in said flow passage and comprising bellows made of fluorocarbon resin having continuous helically extending pleats.