Ram boring machine with impact blade piston
AssigneeTracto-Technik Paul Schmidt Maschinenfabrik KG
InventorPaul Schmidt
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Abstract
In a ram boring machine for laying pipelines without trenching, a double blade that is axially moveable against a compression spring is housed in an impact tip and projects through slots in the impact tip. The double blade is struck by a striker piston and moves, during the breaking-up of an old pipe laid in the ground, substantially independently of the ram boring machine or of its housing. In this way substantially all the impact energy of the piston is used for the benefit of the breaking-up operation.
Claims11
A ram boring machine for laying pipelines without trenching, comprising a housing having a front end, the housing defining a longitudinal axis, a striker piston guided in the housing of the machine and an impact tip fixed to the front end of the housing, the impact tip provided with impact blades, wherein the impact blades are movable in axial direction relative to the impact tip, the impact blades being acted upon by the striker piston.
Dependencies are inferred from the claim text.