The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 28, 1995
Filed:
Feb. 03, 1993
William E Curran, Medinah, IL (US);
Joseph C Weibler, West Chicago, IL (US);
Michael T Egan, Glen Ellyn, IL (US);
The Curran Company, Glendale Heights, IL (US);
Abstract
A shielding vent for an electromagnetic interference shielded enclosure having an electrically conducting 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 subdivided into four parallel, axially extending equal fluid flow sections. These fluid flow sections are sufficiently large in cross sectional area that they provide 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 significantly shorter in length than previously used vent pipes of similar diameter, yet the vent affords an adequate degree of EMI shielding.