Pneumatic rock-boring device and method for starting such a device
AssigneeTRACTO-TECHNIK GmbH & Co. KG
InventorFranz-Josef Puttmann
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for horizontal ground-boring, in particular for rock-boring, by a rotating and hammering driven ground-boring device, whereby the device is alternately or simultaneously supplied with compressed air and drilling medium and the compressed air and drilling medium are supplied through a channel.
Claims8
An apparatus for percussive horizontal drilling, having a hammer point with a media channel, which hammer point is partially set within the drilling apparatus and is capable of being displaced axially in relation to the drilling apparatus, characterized in that the drilling apparatus has an outlet opening for discharging fluid that has flowed through the media channel, which opening is in flow communication with the media channel when said axially displaceable hammer point is in one position, and is not in flow communication with said media channel when said hammer point is in a second axially displaced position.
A method for percussive horizontal drilling comprising:
- providing an impact tool in a dead position, said tool including an axially displaceable hammer point with a media channel, and an outlet for discharging fluid,
- discharging fluid that has flowed through the media channel through said outlet when said axially displaceable hammer point is in one position,
- displacing said axially displaceable hammer point to a second position whereby said outlet is not in flow communication with said media channel.
A method of starting an apparatus for percussive horizontal drilling with an impact tool being located in a dead position, and an axially displaceable hammer point with a media channel, which hammer point is partially set within the drilling apparatus and is capable of being displaced axially in relation to the drilling apparatus characterized in that the drilling apparatus is moved relative to the hammer point, thereby
- overlapping the media channel with an outlet opening in the drilling apparatus for discharging fluid that has flowed through the media channel through the outlet opening in the drilling apparatus, or disconnecting the media channel from the outlet opening in the drilling apparatus to prevent fluid communication between the media channel and the outlet, and
- exerting an impulse on the impact piston by the hammer point.
Dependencies are inferred from the claim text.