Bit holder for a ploughing bit and ploughing bit

US7310897B2 · kind B2 · utility

Assignee

• DBT GMBH · DE

Inventors

• Uwe Tillessen · Kamen, DE
• Norbert Hesse · Bochum, DE
• Gerhard Siepenkort · Ascheberg, DE
• Klaus Duhnke · Bochum, DE
• Adam Klabisch · Dortmund, DE

Key dates

• Filing date: Nov 30, 2004
• Grant date: Dec 25, 2007
• Expiry date: Nov 19, 2025

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21C35/1936
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A bit holder for a ploughing bit of a coal or extraction plough includes an insert pocket open on the top side for receiving a bit shank formed on the ploughing bit. The pocket is bounded by two lateral supporting walls, a front and a rear supporting wall, whereby the rear supporting wall has an elevated section projecting over the adjoining, lateral supporting walls. The rear supporting wall forming a bit support for the ploughing bit slopes down to its outer regions. In order to allow a good support for an inserted bit and easy and fast installation of the bit the front face of the rear supporting wall is fitted on the outer regions with guiding surfaces sloping down inwards to the insert pocket as an installation aid for the ploughing bit.