Walking prop for mine tunnels

US5190414A · kind A · utility

Assignee

• Strebtechnik Bochum GmbH & Co. · DE

Inventors

• Hans-Ferdinand Bemmerl · Herne, DE
• Alois Scheunert · Recklinghausen, DE
• Peter Kroninger · Gelsenkirchen, DE
• Peter E. Rose · Salt Lake City, US
• Alfred Bollmann · Bochum, DE

Key dates

• Filing date: Apr 3, 1992
• Grant date: Mar 2, 1993
• Expiry date: Apr 3, 2012

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21D23/0436
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A walking mining prop has a skid-lifting assembly in the region of the ram which braces the roof cap with respect to the skid formed by a bridge from which lifting cylinders are articulated and suspended. The pistons of these lifting cylinders are articulated to a pressure plate which at least partly surrounds the guide rods of a guide-rod assembly on which the skid is guided, a mechanism being provided to advance the skid relative to the guide-rod assembly.