Donald L Dawson

US Patent:

D2676869, Jan 25, 1983

Filed:

Oct 3, 1980

Appl. No.:

6/193734

Inventors:

Donald R. Dawson - Houston TX

International Classification:

D0604

US Classification:

D 6127

US Patent:

60502614, Apr 18, 2000

Filed:

Sep 10, 1997

Appl. No.:

8/926788

Inventors:

R. David Lewis - Auburn GA
Robert E. Gray - Lawrenceville GA
Donald W. Dawson - Lawrenceville GA
Paul D. Hiltman - Atlanta GA

Assignee:

International Safety Instruments, Inc. - Lawrenceville GA

International Classification:

A62B 700

US Classification:

12820522

Abstract:

A backframe for a self contained breathing apparatus (SCBA) is formed of a molded shell having some depth, and a closure plate fixed to the shell to provide an enclosed volume. The molded shell with the closure plate yields a good weight-to-strength ratio, and provides a water- and dust-resistant enclosure for control components of the SCBA. A water-tight battery compartment is enclosed within the shell so the batteries are separated from other components. A low air pressure alarm provides an auditory signal, and may also include a tactile signal. A buddy breathing hose can be pulled from the backframe to provide a reasonable length tether; and, by connecting two such buddy breathing hoses, twice the length is provided.