Electrolytic capacitor having a highly strained elastomeric seal

Details Electrolytic capacitor having a highly strained elastomeric seal Electrolytic capacitor having a highly strained elastomeric seal

1976-04-07

1977-05-24

Lynch, Michael J.

Electricity: electrical systems and devices

Miscellaneous

29570, H01G 900

Patent

active

040258270

ABSTRACT:
A porous valve-metal capacitor is housed in a metal can and sealed therein by means of an outer glass-to-metal seal, an elastomeric bung and an inner plastic sealing member. The bung is compressed between these inner and outer sealing members so as to be highly strained, the ratio of the compressed to the uncompressed diameters thereof being at least 1.25 and the elastomeric bung being squeezed out radially to occupy at least 75% of the interface area between the inner and outer seals. This capacitor is capable of meeting the requirements of a severe test after 200 cycles from -55.degree. C to 125.degree. C.

REFERENCES:
patent: 3321675 (1967-05-01), Diggens
patent: 3534230 (1970-10-01), Krasienko et al.
patent: 3684927 (1972-08-01), Correll

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