Pre-stressing or dismantling devices therefor

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CPC
E21D11/186

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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D11/00Lining tunnels, galleries or other underground cavities

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E21D11/186Pre-stressing or dismantling devices therefor

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Patents Grantslast 30 patents

Information Patent Grant
Reinforcement system for the concrete lining of the inner shell of...
- Patent number 11,180,994
- Issue date Nov 23, 2021
- BAG BAUARTIKEL GMBH
- Martin Heymann
- E21 - EARTH DRILLING MINING
Information Patent Grant
Rib expander
- Patent number 4,010,616
- Issue date Mar 8, 1977
- Richard Lovat
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
REINFORCEMENT SYSTEM FOR THE CONCRETE LINING OF THE INNER SHELL OF...
- Publication number 20200284147
- Publication date Sep 10, 2020
- Martin HEYMANN
- E21 - EARTH DRILLING MINING