Patent · US Expired

Support column for use in a mine

US5484130A · kind A · utility

7Cited by

8References

8Claims

0Family size

Assignee

Bochumer Eisenhütte Heintzmann GmbH & Co. KG · DE

Inventors

Lothar Domanski · Oberhausen, DE
Rudi Podjadtke · Herne, DE

Key dates

Filing date	Oct 28, 1994
Grant date	Jan 16, 1996
Priority date	—
Expiry date	Oct 28, 2014

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21D15/502
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

An adjustable column for use between ceiling and floor surfaces of a mine has an outer tube having an outer end and an inner end and an inner tube having an inner end in the outer tube at the inner end thereof and an outer end. The tubes are coaxial to an upright axis and an external screwthread on the outer-tube inner end fits with an inner screwthread on the inner-tube inner end so that the tubes can be screwed relative to each other to change the axial length of the column. One of the outer ends is operatively braced against one of the surfaces and the other outer end is spaced from the other of the surfaces. A resiliently compressible support element is braced axially between the other outer end and the other surface.

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