Boring head method and boring head for a ground boring device
AssigneeTRACTO-TECHNIK GmbH & Co. KG
InventorFranz-Josef Püttmann
Life of this patent
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Abstract
The invention relates to a boring head for a ground-boring device displacing earth with a percussive action, comprising at least three boring head sections, of which the first section has a form optimized for the loosening and for guiding the device, the second section is optimized with regard to the radial displacement of the earth with low resistance to motion, and the third section has a fixed connection to the housing of the ground-boring device. Improved transmission of the advancing forces to the earth and consequently an improved advance of the ground-boring device can be achieved by at least two of the boring head sections being designed so as to be axially movable relative to one another in the longitudinal direction.
Claims30
A boring head, comprising at least three boring head sections, arranged to define in a boring direction a first boring head section located at a front of the boring head and having discharge passages a second boring head section following the first boring head section and having an outer surface formed with largely conical sections which rise in opposition to the boring direction, and a third boring head section having a base, said base being adapted for fastening the boring head to a housing of a ground-boring device that displaces earth with a percussive action.
A boring head for a ground-boring device displacing earth with a percussive action, comprising at least three boring head sections arranged in a boring direction to define a first boring head section located at a front of the boring head and having discharge passages;
- a second boring head section following the first boring head section and having an outer surface formed with ha largely conical sections, which rise in opposition to the boring direction, and a third boring head section having a base for fastening the boring head to a housing of the ground-boring device, wherein at least two of the boring head sections are movable axially relative to one another with respect to a longitudinal axis of the boring head.
A method of using a boring head on a displacement ground boring device, comprising the steps of:
- loosening and for guiding the device using a first boring head section located at the front of the boring head in the boring direction, said first boring head section having discharge passages;
- and
- providing radial displacement of the earth with low resistance to motion using a second boring head section, said second boring head section following the first boring head section and having largely conical sections on an outer surface of the second boring head section, said largely conical sections rising against the boring direction;
- and
- moving at least two of the three boring head sections the third boring head section having a base, said base being adapted for fastening the boring head to a housing of a ground-boring device—that displaces earth with a percussive action.
The method of claim 33, further comprising the step of axially moving at least two of the boring head sections relative to one another with respect to the longitudinal axis of the boring head.
Dependencies are inferred from the claim text.