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US005687713A
United States Patent [19] [ii] Patent Number: 5,687,713
Bahr et al. [45] Date of Patent: Nov. 18, 1997
[54] BREATHING MASK
[76] Inventors: Erik W. Bahr. Fugleveien 5, N-1440 Dr0bak; 0ystein Ljungmann. Elgfaret 15, N-1404 Siggerud; Nils Kvandal. Qrreveien 3B, N-1415 Oppegard; Vigbj^m Matre. Ormerudveien 59A, N-1410 Kolbotn, all of Norway
[21] Appl. No.: 558,948
[22] Filed: Nov. 13,1995
Related U.S. Application Data
[63] Continuation of Ser. No. 244,232, filed as PCT/N092/ 00186, Nov. 26, 1992 published as WO93/10858, Jun. 10, 1993, abandoned.
[30] Foreign Application Priority Data
Nov. 29, 1991 [NO] Norway 914695
[51] Int CI.6 A62B 18/04
[52] U.S. CI 128/206.21; 128/201.28;
128/204.18; 128/205.13; 128/205.22; 128/205.25
[58] Field of Search 128/201.19,201.22,
128/201.24. 201.28. 204.18. 205.13. 205.21, 205.22, 205.25. 206.24. 206.26, 206.23,
206.25
[56] References Cited
U.S. PATENT DOCUMENTS
409,428 8/1889 Riehet 128/201.19
1,105,127 7/1914 Drager 128/206.26
2,410,454 5/1946 Motsinger 128/201.19
2,444,417 7/1948 Biexoran 128/201.19
2,588,516 2/1952 Glidden 128/201.19
3,149,632 9/1964 Colley 128/201.24
3,167,069 1/1965 Lobelle 128/201.24
3,392,724 7/1968 Cowley 128/205.21
3,491,752 1/1970 Cowley 128/205.22
3,910,269 10/1975 Ansite et al 128/201.24
4,000,883 1/1977 Little et al 128/201.22
4,173^00 11/1979 Ratz et al 128/201.28
4,211,220 7/1980 O'Neill 128/201.28
4,336,799 6/1982 Almasi et al 128/201.28
435,003 6/1986 Shoemaker et al 128/201.19
4,896,665 1/1990 Geravis 128/201.22
4,907,584 3/1990 McGinnie 128/206.24
4,938,211 7/1990 Takahashi et al 128/205.22
5,181,506 1/1993 Tardiff, Jr. et al 128/201.22
5,269,296 12/1993 Landis 128/207.18
FOREIGN PATENT DOCUMENTS
3537095 10/1985 Germany 2/424
2220574 1/1996 United Kingdom 128/201.22
9419055 9/1994 WIPO 128/201.24
Primary Examiner—Vincent Millin
Assistant Examiner—V. Srivastava
Attorney, Agent, or Firm—Abelman, Frayne & Schwab
[57] ABSTRACT
A breathing mask to be placed on a user's head includes a pressure gas container in the form of one or more closed communicating tubes which form a closed or a open ring adapted to encircle the user's face in front of the user's ears, a sealing member preferably being connected in serial arrangement with a pressure reduction valve and an airtight chamber of the mask.
13 Claims, 3 Drawing Sheets
