with toggle joint connection

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Industry

CPC
E21D15/08

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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D15/00Props Chocks

Current Industry

E21D15/08with toggle joint connection

Industries

Patents Grantslast 30 patents

Information Patent Grant
1835515
- Patent number 1,835,515
- Issue date Dec 8, 1931
- E21 - EARTH DRILLING MINING
Information Patent Grant
1653126
- Patent number 1,653,126
- Issue date Dec 20, 1927
- E21 - EARTH DRILLING MINING