SAFETY HELMET Russian patent published in 1994 - IPC

FIELD: individual safety means. SUBSTANCE: collapsible case of safety helmet is made of protective and additional envelopes 1 and 2 correspondingly; the envelopes are connected together by means of washers 3 and bolts 4 or rivets. Centrifugal fan provided with electric motor 5 is mounted in central part of the case onto protective envelope 1. Protective glass 6, air-guiding pipes 7, filter 8 and 9 for rough and fine cleansing of dusted air and air-impermeable envelope 10 are mounted onto the case. Working wheel 11 of the fan is disposed under the hole of envelope 2. Electric motor 5 is fixed in central part of protective envelope 1. Rough cleansing filter 8 is disposed in specified space between protective and additional envelopes 1 and 2 along the total perimeter of their edges. EFFECT: improved efficiency of protection; improved safety of operation. 6 dwg