for mine roof support units for step-by-step movement

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CPC
E21F13/008

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EFIXED CONSTRUCTIONS E21Mining E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS E21F13/00Transport specially adapted to underground conditions

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E21F13/008for mine roof support units for step-by-step movement

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Patents Grantslast 30 patents

Information Patent Grant
Method for removing hydraulic support for solid filling coal mining
- Patent number 10,036,252
- Issue date Jul 31, 2018
- China University of Mining and Technology
- Feng Ju
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and apparatus for transporting materials in a mine
- Patent number 6,602,040
- Issue date Aug 5, 2003
- Petitto Mine Equipment, Inc.
- Angelo A. Petitto
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Material handling platform for material transport vehicle
- Patent number 5,076,749
- Issue date Dec 31, 1991
- Petitto Mine Equipment, Inc.
- Angelo S. Petitto
- E21 - EARTH DRILLING MINING
Information Patent Grant
Material handling platform for material transport vehicle
- Patent number 4,995,783
- Issue date Feb 26, 1991
- Petitto Mine Equipment, Inc.
- Angelo S. Petitto
- E21 - EARTH DRILLING MINING
Information Patent Grant
Articulating mine car coupling
- Patent number 4,212,365
- Issue date Jul 15, 1980
- Paul F. Curry
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Universal trailer for a longwall roof support for longwall undergro...
- Publication number 20030140526
- Publication date Jul 31, 2003
- Dennis R. Thomas
- E21 - EARTH DRILLING MINING