Conformal split planar flow air purifying filter

Patent metadata

Field	Value
Publication number	US-8979985-B2
Application number	US-201313945040-A
Country	US
Kind code	B2
Filing date	Jul 18, 2013
Priority date	Jan 20, 2011
Publication date	Mar 17, 2015
Grant date	Mar 17, 2015

Abstract

A conformal filter is disclosed having a plurality of sorbent beds oriented perpendicular to an inner side surface of the filter which conforms to an adjacent surface, such as a wearer's face when attached to a respirator. The inner side of the filter may approximate the curved shape of an interfacing surface. Because the sorbent beds are oriented perpendicular to the inner side surface, a conformal configuration can be achieved without bending the sorbent beds and while keeping constant bed residence time throughout the entire cross-sectional area of the air flow, thus enforcing even air distribution. Reduced bed depth is also achieved through this configuration which consequently reduces the overall pressure drop through the filter. Other embodiments are described and claimed.

First claim

What is claimed is:

1. A filter, comprising:
an entry port and an exit port, the entry port for introducing air into a filter cartridge, the exit port for directing filtered air from the filter cartridge into at least one of a respirator and purified airspace;
a non-planar inner surface;
an interfacing surface adjacent to the non-planar inner surface;
a sorbent bed having a constant depth of sorbent, the sorbent bed having a flat inlet surface adjacent to an entry space for…

Assignees

• Scott Tech Inc

Inventors

• Ding Frank
• Simmonds Edward Powers
• Parham Michael Lee

Classifications

• B01D53/0415 Primary

  Operations & Transport · mapped topic

• B01D2253/102

  Operations & Transport · mapped topic

• B01D53/0407 Primary

  Operations & Transport · mapped topic

• B01D2258/06

  Operations & Transport · mapped topic

• B01D2259/4541

  Operations & Transport · mapped topic