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. 24, 2004
Filed:
Jul. 18, 2003
Toru Kouda, Tokyo, JP;
Nitto Kohki Co., Ltd, , JP;
Abstract
The present invention provides a pipe coupling socket that enjoys improved safety when connected to a plug. This socket comprises a socket body containing a ball valve and having locking elements at its distal end portion, a valve control sleeve fitted on the outer peripheral surface of the socket body for axial movement and capable of actuating the ball valve, a plug connecting sleeve fitted on the outer peripheral surface of the socket body for axial movement and capable of locking and unlocking the plug with the aid of the locking elements, first lock means which prevents the advance of the plug connecting sleeve, second lock means which prevents the retreat of the plug connecting sleeve and the advance of the valve control sleeve, and third lock means which prevents the retreat of the plug connecting sleeve and the valve control sleeve.