with essential hydraulic elements

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CPC
E21D17/003

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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D17/00Caps for supporting mine roofs

Current Industry

E21D17/003with essential hydraulic elements

Industries

Patents Grantslast 30 patents

Information Patent Grant
Telescopic support caps, e.g. for use in mining
- Patent number 3,991,577
- Issue date Nov 16, 1976
- Heuilleres du Bassin de Lorraine
- Jean P. Thevenoux
- E21 - EARTH DRILLING MINING
Information Patent Grant
2904319
- Patent number 2,904,319
- Issue date Sep 15, 1959
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
METHOD OF MINING SINGLE STEEPLY-INCLINED THICK COAL SEAM
- Publication number 20200024944
- Publication date Jan 23, 2020
- Shandong University of Science and Technology
- Zhongping GUO
- E21 - EARTH DRILLING MINING
Information Patent Application
TEMPORARY ROOF SUPPORT SYSTEM WITH ANTI-ROTATION FEATURE
- Publication number 20160102552
- Publication date Apr 14, 2016
- Caterpillar Global Mining America LLC
- David M. Denson
- E21 - EARTH DRILLING MINING