Portable respiratory protection device

Details Portable respiratory protection device Portable respiratory protection device

1990-09-19

1991-11-19

Burr, Edgar S.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820612, 12820418, 12820125, 12820527, A62B 710, A62B 2302

Patent

active

050657453

ABSTRACT:
A respiratory protection device having a housing with a housing arm on which a filter having an inlet and an outlet is detachably mounted. The housing has a suction opening for ambient air that is generally covered by a portion of the filter. Spaces are formed between the filter and the housing through which ambient air can pass to the suction opening. A radial blower is located in the housing in communication with the suction opening to convey ambient air under pressure through a channel located in the housing arm to the filter. The covering of the suction opening by the filter prevents water drip or spray from passing into the interior of the housing and prevents accidental covering of the opening.

REFERENCES:
patent: 1929343 (1933-10-01), Belloni
patent: 3565068 (1971-02-01), Bickford
patent: 3822698 (1974-07-01), Guy
patent: 3963021 (1976-06-01), Bancroft
patent: 4127122 (1978-11-01), Kienhofer et al.
patent: 4233972 (1980-11-01), Hauff et al.
patent: 4430995 (1984-02-01), Hilton
patent: 4522639 (1985-06-01), Ansite et al.
patent: 4590951 (1986-05-01), O'Connor

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