Filter element

USRE35062E · kind E · reissue

Assignee

• Minnesota Mining and Manufacturing Company · US

Inventors

• Gerald M. Brostrom · Burnsville, US
• Daniel A. Japuntich · Windom, US
• Sabrina M. Yard · Windom, US

Key dates

• Filing date: Jun 17, 1993
• Grant date: Oct 17, 1995
• Expiry date: Jun 17, 2013

Classification

• Technology area (CPC —): General

Abstract

A filter element adapted for attachment to a respirator face piece which includes front and rear walls of filter material, a breather tube, and a porous inner layer which maintains the front and rear walls in a spaced-apart relationship over substantially their entire area and which functions to evenly distribute air flow across the available filter element surface area.