Helmet with an air filtering device

Details Helmet with an air filtering device Helmet with an air filtering device

1992-03-04

1996-07-09

Burr, Edgar S.

Surgery

Respiratory method or device

Including body or head supported means covering user's scalp

12820124, 12820512, 2410, A62B 710

Patent

active

055335004

ABSTRACT:
This invention relates to a helmet with an air filtering device and in particular to one which utilizes a meter to drive a fan so as to suck in air and transmit the air through a filtering device which divides the air into two streams respectfully supplied to the head and nose of an user on one hand and exhausts the exhaled air out of the helmet through a plurality of check valve, thereby enabling the user to inhale cleaned air.

REFERENCES:
patent: 3822698 (1974-07-01), Guy
patent: 4186736 (1980-02-01), Angioletti et al.
patent: 4227520 (1980-10-01), Lord
patent: 4502480 (1985-03-01), Yamamoto
patent: 4730612 (1988-03-01), Dampney
patent: 5022900 (1991-06-01), Bar-Yona et al.
patent: 5042474 (1991-08-01), Williamson
patent: 5054480 (1991-10-01), Bare et al.
patent: 5125402 (1992-06-01), Greenough

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