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Patent applications and USPTO patent grants for von Eckardstein; Karl-Ernst.The latest application filed is for "device for the pneumatic discharge of concrete that is hydromechanically transported in a dense flow".
Patent | Date |
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Device for the pneumatic discharge of concrete that is hydromechanically transported in a dense flow Grant 5,536,151 - von Eckardstein July 16, 1 | 1996-07-16 |
Apparatus for pneumatically discharging concrete Grant 5,066,203 - Coja , et al. November 19, 1 | 1991-11-19 |
Method and apparatus for pneumatically discharging hydromechanically conveyed hydraulic building material for underground operations Grant 4,708,288 - von Eckardstein November 24, 1 | 1987-11-24 |
Apparatus for distributing concrete, especially in the shuttering of gallery linings in mine and tunnel workings Grant 4,280,771 - Schwing , et al. July 28, 1 | 1981-07-28 |
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