Surgery – Respiratory method or device – Means for indicating improper condition of apparatus
Patent
1978-08-10
1981-02-17
Haroian, Harry N.
Surgery
Respiratory method or device
Means for indicating improper condition of apparatus
12820418, 12820628, A62B 902
Patent
active
042508762
ABSTRACT:
There is disclosed an emergency breathing apparatus that provides a sustained life support for a period of time up to about 30 minutes and that is useful for fire fighters and the like in a hostile environment. The device comprises a harness with a backpack air supply cylinder provided with a shut-off valve and pressure regulator at the cylinder. The regulator has a bypass connection for attachment of a remote pressure sensor and a valve which opens when the pressure declines to a predetermined value and applies regulated air pressure to an audible warning device such as a whistle, buzzer, bell and the like. The device employs a pilot regulator on the mask which is a very compact and simple structure with only a few moving parts, and consequently, easier to manufacture and maintain than more bulky, complicated structures of the prior art. The pilot regulator is provided with a manual switch to change its operation from demand to pressure demand so that the mask can be donned in the demand position without a continuous loss of air and thereafter switched to the pressure demand mode to provide a continuous, regulated supply of air to the user.
REFERENCES:
patent: 2362643 (1944-11-01), Lambertsen
patent: 2406888 (1946-09-01), Meidenbauer
patent: 2523906 (1950-09-01), Holmes
patent: 2854001 (1958-09-01), Humblet
patent: 2861569 (1958-11-01), Emerson
patent: 3147761 (1964-09-01), Lecocq
patent: 4127129 (1978-11-01), Cramer
Haroian Harry N.
Robertshaw Controls Company
LandOfFree
Emergency life support system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Emergency life support system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Emergency life support system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2257751