Support for underground mining and tunnel construction

Details Support for underground mining and tunnel construction Support for underground mining and tunnel construction

1998-12-28

2000-05-02

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

2483542, 405288, E21D 2514, E21D 2304

Patent

active

060564806

ABSTRACT:
There is a support for underground mining and tunnel construction, comprising an outer tube and an inner tube, which can be pushed into each other in a telescoping manner. A piston acted upon by a hydraulic pressure medium is located in the outer tube. This piston, when acted upon by pressure, acts on the inner tube to cause an extension. The outer tube and the inner tube can be fixed on each other by means of a mechanical locking device.

REFERENCES:
patent: 4167361 (1979-09-01), Petro et al.
patent: 4726714 (1988-02-01), MacArthur
patent: 5143340 (1992-09-01), Wood et al.
patent: 5165824 (1992-11-01), Corcoran et al.
patent: 5413436 (1995-05-01), Merz
patent: 5564867 (1996-10-01), Domanski et al.
patent: 5720581 (1998-02-01), Dacon et al.
patent: 5868527 (1999-02-01), King et al.
patent: 5921718 (1999-07-01), Kolk

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