Patent · US Expired

Arrangement for erecting columnar supporting elements for underground excavations

US4332512A · kind A · utility

15Cited by

7References

29Claims

0Family size

Assignee

Bochumer Eisenhütte Heintzmann GmbH & Co. KG · DE

Inventors

Peter Heintzmann · Bochum, DE
Manfred Koppers · Sörup, DE
Karlheinz Bohnes · Bochum, DE

Key dates

Filing date	Apr 30, 1980
Grant date	Jun 1, 1982
Priority date	—
Expiry date	Apr 30, 2000

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21D15/002
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

An arrangement for erecting a columnar supporting element of a hardenable flowable material, for a roof of an underground excavation, has a hollow casing for filling with a hardenable flowable material and is composed of two telescopable casing portions each composed of two open-end semi-circular sections, an element for holding the upper casing portion in contact with the roof of an underground excavation and arranged adjacent to the casing, and elements for connecting the semi-circular sections of at least the lower prop casing portions with one another so as to be pivotable about a longitudinal pivot axis which is parallel to the longitudinal axis of the prop casing, and locking the same with one another.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.