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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.:

US 11554350 B1

PDFFull Text
Date of Patent:
Jan. 17, 2023

Filed:

Dec. 11, 2018

Infernal pressure adjustment member and electrical component for transport equipment

Applicant:

Nitto Denko Corporation, Ibaraki, JP;

Inventors:

Kou Uemura, Osaka, JP;

Teppei Tezuka, Osaka, JP;

Satoshi Nishiyama, Osaka, JP;

Tomoyuki Kasagi, Osaka, JP;

Assignee:

NITTO DENKO CORPORATION, Osaka, JP;

Attorney:

Hamre, Schumann, Mueller & Larson, P.C.

Primary Examiner:

Jason M Greene

Int. Cl.
CPC ...
B01D 71/36 (2006.01); B01D 39/16 (2006.01); B01D 53/22 (2006.01); B01D 69/02 (2006.01); B01D 69/10 (2006.01); F21V 31/03 (2006.01); F21S 45/30 (2018.01);
U.S. Cl.
CPC ...
B01D 71/36 (2013.01); B01D 39/1692 (2013.01); B01D 53/228 (2013.01); B01D 69/02 (2013.01); B01D 69/10 (2013.01); F21V 31/03 (2013.01); B01D 2239/1291 (2013.01); B01D 2325/02 (2013.01); F21S 45/30 (2018.01);
Abstract

Provided is an internal pressure adjustment member to be attached to an outer surface of a housing, the member having high air permeability even when a differential pressure that can be generated between the inside and the outside of a housing to which the internal pressure adjustment member is attached is small, and inhibiting damage to the member and a reduction in the air permeability of the member due to coming soil and mud. The internal pressure adjustment member includes: a filter portion including a net-like or mesh-like support layer and first and second porous polytetrafluoroethylene (PTFE) membranes laminated on the support layer such that the support layer is interposed therebetween, the first porous PTFE membrane being exposed on one surface of the filter portion, the second porous PTFE membrane being exposed on another surface of the filter portion; and an adhesive portion, formed on the one surface of the filter portion, for attaching the filter portion to the outer surface of the housing. The first porous PTFE membrane and the second porous PTFE membrane each have an average pore diameter of 2.0 μm or more, the filter portion has a thickness of 140 μm or less, and the filter portion has a density of 0.60 g/cmor less.

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