DEVICE TO LAY DOWN PIPELINES BY TRENCHLESS METHOD Russian patent published in 1995 - IPC

FIELD: civil engineering. SUBSTANCE: device has a base with slideways, frame, cap, casing, percussion mechanism with a hammer, and a support with elastic member. The frame is installed so to be moved along slideways. The casing is rigidly connected to the frame. Percussion mechanism is positioned inside the casing. The support is installed on slideways so to be moved and stopped in intermediate positions. Elastic element is fastened on the support and installed so to interact with the frame. The hammer is made in the form of a barrel with a bore on its front end, and with a chamber to place gunpowder charge, fixtures to return the hammer, and fixtures to ignite gunpowder charge. EFFECT: high productivity. 1 dwg