Title:
Closed cycle respirator
United States Patent 3277890
US Patent References:
Respiratory protective apparatus
- - 1999086
Oxygen emergency apparatus with closed respiratory circuit
- - 2106393
Breathing apparatus dump valve
- - 2710003
Closed circuit breathing apparatus
- - 2852023
Respiratory protective apparatus
- - 1999086
Oxygen emergency apparatus with closed respiratory circuit
- - 2106393
Breathing apparatus dump valve
- - 2710003
Closed circuit breathing apparatus
- - 2852023
Inventors:
Ernst, Warncke
Publication Date:
10/11/1966
View Patent Images:
Export Citation:
Assignee:
Drager, Otto H.
Primary Class:
Other Classes:
128/205.170
International Classes:
A62B7/08; A62B25/00; A62B7/00