Percussion boring device

US10480246B2 · kind B2 · utility

Assignee

• TRACTO-TECHNIK GmbH & Co., KG · DE

Inventors

• Franz-Josef Puttmann · Lennestadt, DE
• Gerhard Völkel
• Gerhard Balve · Lennestadt, DE

Key dates

• Filing date: Jun 28, 2016
• Grant date: Nov 19, 2019
• Expiry date: Nov 10, 2036

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B4/145
• WIPO field: Civil engineering
• WIPO sector: Other fields

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.