ARRANGEMENT FOR LAYING DRAINAGE SYSTEM Russian patent published in 1994 - IPC

FIELD: ground excavation. SUBSTANCE: arrangement for laying drainage system has working member, frame, material conduit for placing drainage material with hopper and mold, and three conduits for conveying materials. Secured to top part of the material conduit are three rolls of protective material. Belts of this material are passed from the rolls through conduits to extend in U-shaped fashion from outlet slots of the conduits and protect drainage material laid in trench against penetration of ground particles. To turn the belts forming side elements of U-shaped protective shield, interiors of the conduits have poles positioned at an angle of 45 deg to the travel path of the arrangement. The poles are secured by their ends to inner surfaces of conduits, whereas midportions of pole surfaces are spaced from inner surfaces of the conduits. EFFECT: accelerated drainage laying. 5 dwg