Apparel – Guard or protector – For wearer's head
Patent
1989-12-05
1991-07-16
Nerbun, Peter
Apparel
Guard or protector
For wearer's head
21713, 12820125, A61F 906
Patent
active
050312375
ABSTRACT:
The present invention comprises apparatus and methods of using a light sensitive switch, such as a photo-electric or photo-resistive cell, to actuate a battery powered electric motor which rotates a fan blade located within a housing near a facial area of a welding helmet. When exposed to a high intensity light, such as the light emitted during a welding process, the photoconductive cell actuates the battery powered motor. When activated, the motor rotates the fan blade which draws air away from the face of a wearer and passes such air through a filter into an air flow chamber, thereby, filtering the drawn air. The rotation of the fan blade then forces the filtered air toward the facial area of the wearer. A smoke block, which restricts the entrance of smoke or other contaminated vapors from entering the confines between the interior surface of the helmet and the face of the wearer, may be removably attached to the helmet.
REFERENCES:
patent: 911476 (1909-02-01), Cheesman
patent: 2103006 (1937-12-01), Helfenstein et al.
patent: 3238535 (1966-03-01), Richey
patent: 3629868 (1971-12-01), Greenlee
patent: 3921223 (1975-11-01), Hoyecki
patent: 3943573 (1976-03-01), Budmiger
patent: 4071912 (1978-02-01), Budmiger
patent: 4309774 (1982-01-01), Guzowski
patent: 4498202 (1985-02-01), Yamamoto
patent: 4852562 (1989-08-01), Howie
Brochure titled, "RACAL Introduces POWERFLOW Air You Can Wear Almost Anywhere!", Feb. 1986.
Brochure titled, "3M Occupational Health & Safety Products".
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