US 6,334,260 B1 · Strata movement indicators

Abstract

A strata movement indicator suspended within a borehole 1 is provided with a drive element 6 and a reference element 12, relative movement between the elements being translated into rotary motion to give a visual indication on an indicator 10, 24 on the respective elements.

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Facts

Application

09/514,290Filed 28 Feb 2000

Granted

1 Jan 2002

Term ends

Not estimatedThe source records don’t support an estimate.

Classification4 codes

G01B 5/30
Measuring arrangements characterised by the use of mechanical techniques: for measuring the deformation in a solid, e.g. mechanical strain gauge
E21F 17/185
Special adaptations of signalling or alarm devices: rock-pressure control devices with or without alarm devices; Alarm devices in case of roof…
G01B
Measuring length, thickness or similar linear dimensions
E21F
Safety devices, transport, filling-up, rescue, ventilation, or draining in or of mines

Strata movement indicators

Life of this patent

Abstract

Claims0

Strata movement indicators

Life of this patent

Abstract

Claims0