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03-27-2013

PRESSURE VESSEL CAP MEMBER AND BLOW PIN ENGAGEMENT STRUCTURE, PRESSURE VESSEL CAP STRUCTURE COMPRISING SAME, AND PRESSURE VESSEL MANUFACTURING METHOD

Ins a pressure vessel (1) which is formed by blow molding a plastic liner (2) with a mouth member (4) fitted on a blow pin (11), a rotational torque is prevented from being applied between the mouth member and the blow pin when removing the blow pin. A parison (12) is placed around the mouth member which is fitted on the blow pin, and is blow molded with a die assembly placed around the parison so that a vessel shaped plastic liner (2) is formed. An engagement structure which is provided between the mouth member of the pressure vessel and the blow pin includes a ball (22) moveably received in a radial through hole of the peripheral wall of the blow pin, and a release groove (20) formed on an inner circumferential surface of the mouth member and having a prescribed depth. When the blow pin is introduced into the mouth member until the ball and the release groove oppose each other, the ball moves radially outward and become partly received by the release groove to engage the mouth member with the blow pin

Document: EP2573447A1
Click here for the full patent text at DEPATISnet [PDF]
Published patent application
Disclosure date: 06-29-2011
Publication date: 03-27-2013
Applicant: YACHIYO IND CO LTD, JP
Inventor: OHASHI JUN, JP ; TANI TATSUSHI, JP ; TASHIRO MASAHIRO, JP


© European Patent Office. This information was obtained from the espacenet of the European Patent Office. There is no guarantee of its correctness or curency. For additional information, please use the research at espacenet. It is possible to determine the current legal and procedural status of patents and utility patents/models at http://worldwide.espacenet.com/ kfree of charge.

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