초록 ▼

An improved respirator filter assembly includes an integral fit seal check mechanism easily controlled by the user. Upon release, the seal check mechanism permits free airflow through the filter assembly. The seal check mechanism includes an air passageway having a sealing rim and a blocking member

An improved respirator filter assembly includes an integral fit seal check mechanism easily controlled by the user. Upon release, the seal check mechanism permits free airflow through the filter assembly. The seal check mechanism includes an air passageway having a sealing rim and a blocking member which is selectively movable between engaged and disengaged positions relative to the sealing rim. A spring element is disposed to releasably maintain the blocking member in the disengaged position during filter assembly operation, wherein a user may actuate the blocking member against the bias of the spring element to move the blocking member into the engaged position to substantially prevent entry of air into the air passageway during seal checking.

대표청구항 ▼

1. A seal check mechanism for a respirator, comprising:an air passageway in the respirator, the air passageway having a sealing rim; a blocking member selectively movable between engaged and disengaged positions relative to said sealing rim; and a spring element disposed to releasably maintain said

1. A seal check mechanism for a respirator, comprising:an air passageway in the respirator, the air passageway having a sealing rim; a blocking member selectively movable between engaged and disengaged positions relative to said sealing rim; and a spring element disposed to releasably maintain said blocking member in said disengaged position during respirator operation; wherein said blocking member is user actuatable against the spring element's bias to move said blocking member into said engaged position to substantially prevent entry of air into said air passageway during seal checking.