WORKING MEMBER OF RIPPER Russian patent published in 1994 - IPC

FIELD: ground excavation machinery. SUBSTANCE: working member has central post with transverse girder, side posts with heads, middle post with head leading in location of cutting edges of side posts through length equalling 2-3 maximum loosening depths, and device varying angle of inclination of side posts. Central post has guide in which fastener can be moved. Device for varying angle of side post inclination is made in form of coupled levers whose one ends are rigidly secured to side posts, and the other ends are coaxially connected to one another and to fastener. EFFECT: higher efficiency. 4 dwg