Escape filter device having protective hood

Details Escape filter device having protective hood Escape filter device having protective hood

1977-09-02

1979-05-15

Recla, Henry J.

Surgery

Truss

Pad

1281426, 1281466, A62B 710

Patent

active

041542355

ABSTRACT:
An escape filter device for engagement over the head of a wearer, comprises a protective hood made of a transparent foil, such as, a plastic material. The hood has an opening in the front which aligns with the mouth of the wearer into which a mouthpiece of a filter is attached. The filter has means for purifying the incoming air which is inhaled into the mouth and exhaled out of the mouth directly through passages defined in the filter. The hood includes a nose piece of resilient material which projects inside of the hood against the face of the wearer beneath the nose and over the upper lip. This nose piece may be compressed to engage it tightly against the nose to prevent breathing of any air which enters into the hood by tightening a strap which engages around the jaw and neck of the wearer and may be fastened at the rear of the hood. An additional chin strap or strap fitting below the chin against the neck may be provided.

REFERENCES:
patent: 472048 (1892-04-01), Helbing
patent: 1978994 (1934-10-01), Fortunato
patent: 2262522 (1941-11-01), Yant et al.
patent: 4055174 (1977-10-01), LeVasseur

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