In a scraper excavating apparatus, the secondary lip comprises an apron skirt which is coextensive in width with, and is of sustantially similar curvature as, the apron of the scraper; guideways which are fastened at each side of the apron and which are operable to guide vertical travel of the skirt over the lower portion of the forward, exterior side of the apron; and a suitable actuator, such as cables, to selectively raise and lower the apron skirt with respect to the apron and to selectively dispose the lowermost terminal edge of the apron skirt contiguously adjacent the uppermost side of the scraper cutting bit.
REFERENCE TO OTHER APPLICATION
This is a continuation-in-part application of copending application of Orville P. Bronson and Bruce L. Crabtree for Utilization of a Secondary Lip for Construction Scraper Equipment, Ser. No. 234,361, filed on Mar. 13, 1972.
