US 10,480,246 B2 · Percussion boring device

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.

Claims20

Dependent claims

A percussion boring device comprising:

a housing;
a guide tube fixed to the housing;
a control sleeve axially displaceable on the guide tube, said control sleeve having at least a first sleeve section, a second sleeve section, and a movable connector movably connecting the first sleeve section and the second sleeve section;
an impact piston mounted within the housing and axially displaceable on the control sleeve such that in a first switching position the impact piston strikes a front impact surface and drives the percussion boring device in a first movement direction, and, in a second switching position said impact piston strikes a rear impact surface and drives the percussion boring device in a second movement direction.

1 more element

Dependencies are inferred from the claim text.

Percussion boring device

Life of this patent

Percussion boring device

Life of this patent

Abstract

Claims20