Title:
SAFETY VALVE DEVICE FOR ENCLOSED CELLS
Document Type and Number:
WIPO Patent Application WO/1985/003386
Kind Code:
A1
Abstract:
A safety valve device used for enclosed cells, in which safety valve device an elastic valve body (4), which has a polygonal upper surface with not more than eight angles, is placed in a valve chamber (3) formed between a cap type positive terminal (1) and a dish type opening seal member (2). Owing to the above-described construction, the volume ratio of the elastic valve body to the interior of the valve chamber can be reduced to a low level. Moreover, the valve body is placed in the center of the interior of the valve chamber so as to seal a gas discharge port reliably, and minimize the variation of the safety valve-operating pressure.
Inventors:
TAKAHASHI AKIRA (JP)
KUDARA YOSHIFUMI (JP)
SHOJI SADAO (JP)
NAKATSUKA SABURO (JP)
KUDARA YOSHIFUMI (JP)
SHOJI SADAO (JP)
NAKATSUKA SABURO (JP)
Application Number:
PCT/JP1985/000016
Publication Date:
August 01, 1985
Filing Date:
January 18, 1985
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
International Classes:
H01M2/12; (IPC1-7): H01M2/12
Foreign References:
| GB1165899A | 1969-10-01 | |||
| JPS5830068A | 1983-02-22 | |||
| JPS58212055A | 1983-12-09 | |||
| JPS5817330Y2 | 1983-04-08 | |||
| JPS5826462Y2 | 1983-06-08 |
Other References:
See also references of EP 0172251A4
Download PDF: