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 Title: |
US4945907:
Face mask
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Tayebi, Amad; Westford, MA
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| Assignee: |
New England Thermoplastics, Inc., Lawrence, MA
other patents from NEW ENGLAND THERMOPLASTICS, INC. (398445) (approx. 3)
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| Published / Filed: |
1990-08-07
/ 1988-10-21
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| Application Number: |
US1988000260593
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| IPC Code: |
Advanced:
A62B 23/02;
Core:
A62B 23/00;
IPC-7:
A62B 7/10;
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| U.S. Class: |
Current:
128/206.12;
128/206.15;
128/206.17;
128/206.28;
Original:
128/206.12;
128/206.15;
128/206.17;
128/206.28;
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| Field of Search: |
128/206.12,206.15,206.17,206.25,207.11,207.12,206.28
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| Priority Number: |
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| Abstract: |
A reusable face mask is disclosed that filters particulate matter and noxious and poisonous gasses from breathed air. The face mask has a mask shell that is thermoformed of cross-linked, closed cell foam sheet that is impermeable to air while having good shape retention and elasticity. The mask shell is perforated with multiple holes in its central area to permit inhaled air to pass through the otherwise impermeable shell. The mask shell is stiff enough to support filter mounting apparatus that has an internal potion and an external portion that both cover the multiple holes. Filters made from filter sheet material and having a self-adhesive strip around their periphery are removably attached to the mounting apparatus to filter breathed air. Neither the mounting apparatus nor the filters ever touch the face of the wearer of the face mask. By using two filters, selective combinations of noxious and poisonous gasses, dusts and mists may be filtered from breathed air.
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| Attorney, Agent or Firm: |
Funk, Joseph E. ;
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| Primary / Asst. Examiners: |
Hafer, Robert A.; Rooney, Kevin G.
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| Maintenance Status: |
E1 Expired Check current status
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Parent Case: |
This is a division of application Ser. No. 041,001, filed Apr. 13, 1987 now U.S. Pat. No. 4,856,508.
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| Family: |
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First Claim:
Show all 6 claims |
What is claimed is:
1. A face mask for filtering air comprising;
- a unitary mask shell formed of a flexible, air impermeable, foam that has physical properties that provide shape retention to said mask shell, said mask shell having a least one hole through the central portion thereof, and elasticity that enables the edge of said unitary mask shell to conform and seal to the face of a wearer around their nose and mouth;
- a first mounting means separate from but fastened to said mask shell, said first mounting means being made from a rigid material said first mounting means having an opening that is in registration with said at least one hole; and
- a first filter liner for filtering the air passing through said holes, said first filter liner having an adhesive strip around its periphery, and said adhesive strip being used to fasten said first filter liner and said face mask by being adhesively fastened to said first mounting means, said filter liner not contacting the face of the wearer when the face mask is worn, and said first filter liner covering said at least one hole to thereby filter all inhaled air passing through said at least one hole.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 24 U.S. patent(s) that reference this one
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