Percussion boring device
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United States of America Patent
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-
Nov 19, 2019
Grant Date -
Dec 20, 2018
app pub date -
Jun 28, 2016
filing date -
Jul 1, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A percussion boring device with an impact piston is mounted within a housing and driven in a cyclic back and forth movement. In a first switch position, the impact piston strikes a front impact surface, in order to drive the percussion boring device in a first movement direction, and, in a second switch position, the impact piston strikes a rear impact surface, in order to drive the percussion boring device in a second movement direction. For the reversal of the movement directions, a guide tube fixed to the housing, and a control sleeve which can be axially shifted on the guide tube, are provided, and the impact piston can be axially shifted on the control sleeve. The control sleeve includes two sections which are connected to one another by a movable connection.
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