Protective breathing apparatus and valve therefor

Details Protective breathing apparatus and valve therefor Protective breathing apparatus and valve therefor

1974-12-05

1976-11-09

Kamm, William E.

Surgery

Truss

Pad

1281466, 137854, 251172, 251333, A62B 1802

Patent

active

039904393

ABSTRACT:
A respirator or gas mask has a check valve having a seat with a raised border. A soft rubber valve is located on the seat and held thereto by a valve retainer. When the valve is not under any pressure, the valve is sealed solely by contact between the rim of the valve and the raised portion of the seat. When back-pressure is placed on the valve, it seats on the entire valve seat area.

REFERENCES:
patent: 1550376 (1925-08-01), Longacre
patent: 2051023 (1936-08-01), Bullard
patent: 2174503 (1939-09-01), Whipple
patent: 2588516 (1952-03-01), Glidden
patent: 2664887 (1954-01-01), Green
patent: 2996722 (1961-08-01), Jacobs
patent: 3220408 (1945-11-01), Silverberg

Affiliated with

Also associated with

Rating

Protective breathing apparatus and valve therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Protective breathing apparatus and valve therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Protective breathing apparatus and valve therefor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1719697