Hans Vondracek

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Breckerfeld, DE

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Patents Grantslast 30 patents

Information Patent Grant
Device for manufacturing curved helical springs
- Patent number 5,868,996
- Issue date Feb 9, 1999
- Fried. Krupp AG Hoesch-Krupp
- Hans Vondracek
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Arrangement for ball shot peening helical compression springs
- Patent number 5,591,066
- Issue date Jan 7, 1997
- Fried. Krupp AG Hoesch-Krupp
- Hans Vondracek
- B24 - GRINDING POLISHING
Information Patent Grant
Method of optimizing the distribution of inherent stress in springs
- Patent number 5,534,088
- Issue date Jul 9, 1996
- Hoesch Federn GmbH
- Hans Vondracek
- C21 - METALLURGY OF IRON
Information Patent Grant
Method of and device for manufacturing curved helical springs
- Patent number 5,442,945
- Issue date Aug 22, 1995
- Fried. Krupp AG Hoesch-Krupp
- Hans Vondracek
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...