H - Electricity – 05 – K
Patent
H - Electricity
05
K
H05K 9/00 (2006.01)
Patent
CA 2114763
VENT FOR SHIELDED ENCLOSURES Abstract of the Disclosure A shielding vent for an electromagnetic inter- ference shielded enclosure having an electrically con- ducting wall shield includes a mounting plate or flange through which extends a vent pipe with an internal septum plate or divider extending axially along at least a portion of the inner length of the vent pipe. The mounting flange is secured to a wall of the shielded enclosure over an opening in the wall and to the wall shield to insure that the integrity of the shielding for the enclosure is maintained. With the mounting flange so mounted on the wall of the enclosure, the vent pipe extends through the opening in the wall of the enclosure and provides fluid communication between an internal region of the enclosure and a region external of the enclosure. The septum plate has a cross section in the shape of a cross so that at least a portion of the length of the cylindrically shaped vent pipe is sub- divided into four parallel, axially extending equal fluid flow sections. These fluid flow sections are suf- ficiently large in cross sectional area that they pro- vide a minimum of resistance to fluid flowing through the vent pipe. By using the cross-shaped septum plate in the vent pipe, the vent pipe can be made signifi- cantly shorter in length than previously used vent pipes of similar diameter, yet the vent affords an adequate degree of EMI shielding.
Curran William E.
Egan Michael T.
Weibler Joseph C.
Curran Company (the)
Smart & Biggar
LandOfFree
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