having protective means

Industry

CPC
E21D23/03

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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D23/00Mine roof supports for step- by- step movement

Current Industry

E21D23/03having protective means

Industries

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Patents Grantslast 30 patents

Information Patent Grant
Distributed coal cutting device for longwall face of coal mine
- Patent number 12,049,824
- Issue date Jul 30, 2024
- Ruifu Yuan
- E21 - EARTH DRILLING MINING
Information Patent Grant
Roof support including extendable links
- Patent number 11,655,711
- Issue date May 23, 2023
- Joy Global Underground Mining LLC
- Keith Dodgson
- E21 - EARTH DRILLING MINING
Information Patent Grant
Stepwise repeated destabilization and stabilization of highly colla...
- Patent number 9,359,725
- Issue date Jun 7, 2016
- Council of Scientific and Industrial Research
- Kanwar Singh
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Self-moving tunnel support canopy
- Patent number 9,291,053
- Issue date Mar 22, 2016
- Xinbin Li
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method for the controlled maintaining of a distance between the top...
- Patent number 8,567,870
- Issue date Oct 29, 2013
- RAG Aktiengesselschaft
- Martin Junker
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method of setting an automatic level control of the plow in plowing...
- Patent number 8,562,077
- Issue date Oct 22, 2013
- RAG Aktiengesselscaft
- Martin Junker
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mining roof support cylinder corrosion protection apparatus and method
- Patent number 7,377,727
- Issue date May 27, 2008
- Avistar, Inc.
- Lawrence Alan Randlett
- E21 - EARTH DRILLING MINING
Information Patent Grant
Powered support frame for large seam thicknesses with controlled ga...
- Patent number 6,481,933
- Issue date Nov 19, 2002
- DBT Deutsche Bergbau-Technik GmbH
- Michael Dettmers
- E21 - EARTH DRILLING MINING
Information Patent Grant
Equipment for shortwall mining useful for extraction of pillars in...
- Patent number 5,769,504
- Issue date Jun 23, 1998
- Council of Scientific & Industrial Research
- Sibnath Maity
- E21 - EARTH DRILLING MINING
Information Patent Grant
Pivot connections for use with mine roof supports
- Patent number 4,701,079
- Issue date Oct 20, 1987
- Gewerkschaft Eisenhutte Westfalia
- Horst Meissner
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mining equipment, mainly for extraction of heavy beds
- Patent number 4,547,098
- Issue date Oct 15, 1985
- Kozponti Banyaszati Fejlesztesi Intezet
- Matyas Martinko
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mining equipment, mainly for extraction of heavy beds
- Patent number 4,386,878
- Issue date Jun 7, 1983
- Kozponti Banyaszati Fejlesztesi Intezet
- Matvas Martinko
- E21 - EARTH DRILLING MINING
Information Patent Grant
Seals for mine roof supports
- Patent number 4,293,247
- Issue date Oct 6, 1981
- Gewerkschaft Eisenhutte Westfalia
- Harry Rosenberg
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mine roof supports
- Patent number 4,191,497
- Issue date Mar 4, 1980
- Gewerkschaft Eisenhutte Westfalia
- Helmut Poklekowski
- E21 - EARTH DRILLING MINING
Information Patent Grant
Process for suppressing dust in mines
- Patent number 4,190,292
- Issue date Feb 26, 1980
- Chemische Fabrik Kalk GmbH
- Harald Johannes
- E21 - EARTH DRILLING MINING
Information Patent Grant
Sheltering apparatus for use in long wall mining
- Patent number 4,189,257
- Issue date Feb 19, 1980
- Taiheiyo Engineering Inc.
- Shigeo Nakajima
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mine roof support
- Patent number 4,126,002
- Issue date Nov 21, 1978
- Dowty Mining Equipment Limited
- John H. Walker
- E21 - EARTH DRILLING MINING
Information Patent Grant
Self-advancing mine roof supports
- Patent number 4,102,140
- Issue date Jul 25, 1978
- Gullick Dobson Limited
- Archelaius Dawson Allen
- E21 - EARTH DRILLING MINING
Information Patent Grant
Roof bar for surface support elements
- Patent number 4,092,831
- Issue date Jun 6, 1978
- Becorit Grubenausbau GmbH
- Walter Lubojatsky
- E21 - EARTH DRILLING MINING
Information Patent Grant
Canopy and shield structure for supporting a shield in a seam-like...
- Patent number 4,089,181
- Issue date May 16, 1978
- Thyssen Industrie AG
- Manfred Koppers
- E21 - EARTH DRILLING MINING
Information Patent Grant
Roof support shield structure for use in an excavation
- Patent number 4,077,223
- Issue date Mar 7, 1978
- Rheinstahl AG
- Manfred Koppers
- E21 - EARTH DRILLING MINING
Information Patent Grant
Apparatus for protecting of coal mine workers
- Patent number 4,067,618
- Issue date Jan 10, 1978
- Taiheiyo Engineering Inc.
- Shigeo Nakajima
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mine roof support and method in longwall mining of thick mineral seams
- Patent number 4,065,929
- Issue date Jan 3, 1978
- Atlantic Richfield Company
- Terry Lee Simpson
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mine roof supports
- Patent number 4,041,714
- Issue date Aug 16, 1977
- Gullick Dobson Limited
- Archelaius Dawson Allen
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mine roof support
- Patent number 4,027,489
- Issue date Jun 7, 1977
- Dowty Mining Equipment Limited
- John Hirst Walker
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mine roof support
- Patent number 4,010,618
- Issue date Mar 8, 1977
- Dowty Mining Equipment Limited
- John Hirst Walker
- E21 - EARTH DRILLING MINING
Information Patent Grant
Assembly for preventing the fall of dust and debris in a mine
- Patent number 4,003,208
- Issue date Jan 18, 1977
- Gerd Hornung
- E21 - EARTH DRILLING MINING
Information Patent Grant
Roof support structure for excavations
- Patent number 3,983,709
- Issue date Oct 5, 1976
- Rheinstahl AG
- Manfred Koppers
- E21 - EARTH DRILLING MINING
Information Patent Grant
Device for sealing a roof of an excavation
- Patent number 3,983,710
- Issue date Oct 5, 1976
- Rheinstahl AG
- Heinrich Heine
- E21 - EARTH DRILLING MINING
Information Patent Grant
3921409
- Patent number 3,921,409
- Issue date Nov 25, 1975
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
DISTRIBUTED COAL CUTTING DEVICE FOR LONGWALL FACE OF COAL MINE
- Publication number 20230340877
- Publication date Oct 26, 2023
- Henan Polytechnic University
- Ruifu YUAN
- E21 - EARTH DRILLING MINING
Information Patent Application
ROOF SUPPORT INCLUDING EXTENDABLE LINKS
- Publication number 20230243260
- Publication date Aug 3, 2023
- Joy Global Underground Mining LLC
- Keith Dodgson
- E21 - EARTH DRILLING MINING
Information Patent Application
METHOD AND DEVICE FOR MONITORING OPERATION OF A MINING MACHINE UNIT
- Publication number 20220136390
- Publication date May 5, 2022
- Caterpillar SARL
- Euan KIRKHOPE
- E21 - EARTH DRILLING MINING
Information Patent Application
ROOF SUPPORT INCLUDING EXTENDABLE LINKS
- Publication number 20200095863
- Publication date Mar 26, 2020
- Joy Global Underground Mining LLC
- Keith Dodgson
- E21 - EARTH DRILLING MINING
Information Patent Application
SYSTEM FOR MOUNTING CROSSBAR OF TEMPORARY ROOF SUPPORT SYSTEM
- Publication number 20160146007
- Publication date May 26, 2016
- Caterpillar Global Mining America LLC
- Kesavan Mohanram
- E21 - EARTH DRILLING MINING
Information Patent Application
STEPWISE REPEATED DESTABILIZATION AND STABILIZATION OF HIGHLY COLLA...
- Publication number 20150197895
- Publication date Jul 16, 2015
- Council of Scientific and Industrial Research
- Kanwar Singh
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Application
SELF-MOVING TUNNEL SUPPORT CANOPY
- Publication number 20150086272
- Publication date Mar 26, 2015
- Xinbin Li
- E21 - EARTH DRILLING MINING
Information Patent Application
STACKABLE MINE ROCK SHIELDS
- Publication number 20130149045
- Publication date Jun 13, 2013
- THREE RIVERS PACKAGING, INC.
- Brian P. DANIELS
- E21 - EARTH DRILLING MINING
Information Patent Application
Method for Producing a Face Opening Using Automated Systems
- Publication number 20120161493
- Publication date Jun 28, 2012
- Martin Junker
- E21 - EARTH DRILLING MINING
Information Patent Application
Method of Setting an Automatic Level Control of the Plow in Plowing...
- Publication number 20110248548
- Publication date Oct 13, 2011
- Martin Junker
- E21 - EARTH DRILLING MINING
Information Patent Application
Longwall Equipment Having Vertically Adjustable Disc Shearer Loader...
- Publication number 20110163590
- Publication date Jul 7, 2011
- RAG Aktiengesellschaft
- Armin Mozar
- E21 - EARTH DRILLING MINING
Information Patent Application
Method for the Controlled Maintaining of a Distance Between the Top...
- Publication number 20100320827
- Publication date Dec 23, 2010
- RAG AKTIENGESELLSCHAFT
- Martin Junker
- E21 - EARTH DRILLING MINING
Information Patent Application
STACKABLE MINE ROCK SHIELDS
- Publication number 20100196103
- Publication date Aug 5, 2010
- THREE RIVERS PACKAGING, INC.
- Brian P. Daniels
- E21 - EARTH DRILLING MINING
Information Patent Application
Mining roof support cylinder corrosion protection apparatus and method
- Publication number 20070160428
- Publication date Jul 12, 2007
- Avistar, Inc.
- Lawrence Alan Randlett
- E21 - EARTH DRILLING MINING
Information Patent Application
Mining roof support cylinder corrosion protection apparatus and method
- Publication number 20060214496
- Publication date Sep 28, 2006
- Avistar, Inc.
- Lawrence Alan Randlett
- E21 - EARTH DRILLING MINING

having protective means

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Distributed coal cutting device for longwall face of coal mine

Roof support including extendable links

Stepwise repeated destabilization and stabilization of highly colla...

Self-moving tunnel support canopy

Method for the controlled maintaining of a distance between the top...

Method of setting an automatic level control of the plow in plowing...

Mining roof support cylinder corrosion protection apparatus and method

Powered support frame for large seam thicknesses with controlled ga...

Equipment for shortwall mining useful for extraction of pillars in...

Pivot connections for use with mine roof supports

Mining equipment, mainly for extraction of heavy beds

Mining equipment, mainly for extraction of heavy beds

Seals for mine roof supports

Mine roof supports

Process for suppressing dust in mines

Sheltering apparatus for use in long wall mining

Mine roof support

Self-advancing mine roof supports

Roof bar for surface support elements

Canopy and shield structure for supporting a shield in a seam-like...

Roof support shield structure for use in an excavation

Apparatus for protecting of coal mine workers

Mine roof support and method in longwall mining of thick mineral seams

Mine roof supports

Mine roof support

Mine roof support

Assembly for preventing the fall of dust and debris in a mine

Roof support structure for excavations

Device for sealing a roof of an excavation

3921409

Patents Applicationslast 30 patents

DISTRIBUTED COAL CUTTING DEVICE FOR LONGWALL FACE OF COAL MINE

ROOF SUPPORT INCLUDING EXTENDABLE LINKS

METHOD AND DEVICE FOR MONITORING OPERATION OF A MINING MACHINE UNIT

ROOF SUPPORT INCLUDING EXTENDABLE LINKS

SYSTEM FOR MOUNTING CROSSBAR OF TEMPORARY ROOF SUPPORT SYSTEM

STEPWISE REPEATED DESTABILIZATION AND STABILIZATION OF HIGHLY COLLA...

SELF-MOVING TUNNEL SUPPORT CANOPY

STACKABLE MINE ROCK SHIELDS

Method for Producing a Face Opening Using Automated Systems

Method of Setting an Automatic Level Control of the Plow in Plowing...

Longwall Equipment Having Vertically Adjustable Disc Shearer Loader...

Method for the Controlled Maintaining of a Distance Between the Top...

STACKABLE MINE ROCK SHIELDS

Mining roof support cylinder corrosion protection apparatus and method

Mining roof support cylinder corrosion protection apparatus and method