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 Title: |
US5062421:
Respiratory mask having a soft, compliant facepiece and a thin, rigid insert and method of making
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Burns, James A.; Lake Elmo, MN
Reischel, Joseph G.; St. Paul, MN
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| Assignee: |
Minnesota Mining and Manufacturing Company, St. Paul, MN
other patents from MINNESOTA MINING AND MANUFACTURING COMPANY (377880) (approx. 9,335)
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| Published / Filed: |
1991-11-05
/ 1991-02-19
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| Application Number: |
US1991000657102
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| IPC Code: |
Advanced:
A62B 18/02;
IPC-7:
A62B 7/10;
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| ECLA Code: |
A62B18/02A;
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| U.S. Class: |
Current:
128/205.27;
128/206.12;
128/206.17;
Original:
128/205.27;
128/206.12;
128/206.17;
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| Field of Search: |
128/205.27,206.12,206.16,206.17
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| Priority Number: |
| 1991-02-19 |
US1991000657102 |
| 1987-11-16 |
US1987000121069 |
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| Abstract: |
The novel respiratory mask has a soft, compliant facepiece to which is permanently sealed a relatively thin, rigid insert. The insert has swept back cheek portions, each formed with an aperture at which a filter cartridge is snapped into place through an opening in the facepiece. Adjacent said opening, the facepiece has a rigid which is bent over and stretched outwardly by the cartridge to create a hermetic seal. Each filter cartridge is asymmetric and swept back to shift the center of gravity inwardly toward the wearer's head, thus making the mask seem to be lighter to a wearer than is a conventional respiratory mask of equal weight which has a center of gravity in front of the wearer's head. Fitted over an annular flange around a central aperture of the insert is a harness attachment. Because the insert and harness attachment can be lightweight, the mask can be lighter in weight than are prior masks having filters of equal weight. The novel respiratory mask can be of low cost, thus making it economical to be discarded after each use.
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| Attorney, Agent or Firm: |
Griswold, Gary L. ;
Kirn, Walter N. ;
Maki, Eloise J. ;
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| Primary / Asst. Examiners: |
Burr, Edgar S.; Lewis, Aaron J.
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| Maintenance Status: |
CC Certificate of Correction issued
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| INPADOC Legal Status: |
Show legal status actions
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