Patent · US Active

Manufacturing process for hydrogen pressure tank

US7736566B2 · kind B2 · utility

1Cited by

2References

19Claims

0Family size

Assignee

GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

Rainer Pechtold · Idstein, DE
Ingo Hermann · Mainz, DE
Markus Lindner · Waldkraiburg, DE

Key dates

Filing date	Aug 5, 2005
Grant date	Jun 15, 2010
Priority date	—
Expiry date	Jan 17, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/32
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A process for manufacturing a compressed gas tank that includes a combination of an injection molding process and a rotomolding process. In a first step, a boss to be positioned in the opening of an outer structural layer of the tank is provided and a thin portion of the liner is injection molded to the boss so that a channel within the boss is filled with the liner material to increase the seal integrity between the boss and the liner. Once the liner material is hardened, the surface of the injection molding liner portion is cleaned. Next, a rotomolding process is performed to mold the remaining portion of the liner to the boss. During the rotomolding process, the injection molded portion of the liner melts to be part of the liner made during the rotomolding process.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.