PROTECTIVE GOGGLES, PREFERABLY, WORKING PROTECTIVE GOGGLES Russian patent published in 2003 - IPC

FIELD: protective devices for glasses. SUBSTANCE: apparatus has whole glass provided with transparent side extension pieces adapted for protecting user's head and made integral with said glass. Glass on side outer ends is made rounded. Side extension pieces are provided with arced curved portions corresponding in shape to said rounded ends. Average radius of rounded portion of side extension pieces is 1-3 cm. Optically correct viewing field may be 110 deg. EFFECT: increased efficiency, wider viewing field and improved side protection of eyes. 21 cl, 13 dwg