DEVICE FOR MAKING MOLE DRAINS Russian patent published in 1994 - IPC

FIELD: land reclamation. SUBSTANCE: device has knife which cuts slot in soil and widens it in upper part. Mole attached to knife is pulled over bottom of slot widened by knife thickened part for a value of mole cross-section. Compactors in form of plates installed successively on frame gradually compact soil round mole by downward pressure. Alternating inclination of compactors to left and right, their successive tapering towards tail part of device and position of lower faces of left and right compactors in plane common for both sides provide for drain formation process, and sharp edges vertically installed in front parts of outer edges of compactors prevent sagging of compactors on solid walls of slot widening part by additional loosening of soil. EFFECT: higher efficiency. 2 dwg