Vent hole assembly

Details Vent hole assembly Vent hole assembly

H - Electricity

05

K

347/33, 356/8

H05K 1/02 (2006.01) H01C 1/022 (2006.01) H01C 7/02 (2006.01) H05K 3/00 (2006.01) H05K 3/26 (2006.01) H05K 5/02 (2006.01)

Patent

CA 1243415

"VENT HOLE ASSEMBLY" Gabe Cherian ABSTRACT Circuit protection devices comprise a PTC con- ductive polymer element within a hollow enclosure sealed except for at least one vent means (a vent or weakened wall section) which is covered by a cover member, preferably of adhesive tape. In one embodi- ment, the exterior surface of the enclosure adjacent the vent and under the cover member is provided with indentations which change the internal pressure required to blow the cover member off the vent, and/or enable the cover member to open during a hot washing step and subsequently to reseal without admitting wash liquid. In another embodiment, the cover member controls the direction in which gases flow after passing through the vent means.

518155

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