Rock bolt overload warning device
Patent
·
OSTI ID:5506153
A washer is described which is used in the construction of the support for the roof of a mine. The washer is fabricated such that finger like projections rupture in stages as the tension on bolts and pressure in the strata of the roof of the mine increases beyond structurely safe limits. The rupturing of the washer emits audible warning signals and also provides a visual indication of an unsafe condition.
- Assignee:
- EDB-84-019813
- Patent Number(s):
- US 4410296
- OSTI ID:
- 5506153
- Resource Relation:
- Patent File Date: Filed date 30 Oct 1981; Other Information: PAT-APPL-316973
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
42 ENGINEERING
ROOF BOLTS
DESIGN
SAFEGUARDS
UNDERGROUND MINING
ROOFS
ALARM SYSTEMS
ROCKS
SUPPORTS
EQUIPMENT
MECHANICAL STRUCTURES
MINING
MINING EQUIPMENT
012000* - Coal
Lignite
& Peat- Mining
016000 - Coal
Lignite
& Peat- Health & Safety
420206 - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)
42 ENGINEERING
ROOF BOLTS
DESIGN
SAFEGUARDS
UNDERGROUND MINING
ROOFS
ALARM SYSTEMS
ROCKS
SUPPORTS
EQUIPMENT
MECHANICAL STRUCTURES
MINING
MINING EQUIPMENT
012000* - Coal
Lignite
& Peat- Mining
016000 - Coal
Lignite
& Peat- Health & Safety
420206 - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)