|
| US3997194 | 5. Sept. 1975 | 14. Dez. 1976 | S.A. des Anciens Etablissements Paul Wurth | Compensator connection for tuyere stock |
| US4023782 | 5. Sept. 1975 | 17. Mai 1977 | S.A. des Anciens Etablissements Paul Wurth | Tuyere stock and compensator joint therefore |
| US4023832 | 16. Sept. 1975 | 17. Mai 1977 | S.A. des Anciens Etablissements Paul Wurth | Apparatus for the transmission of heated fluid |
| US4027605 | 6. März 1973 | 7. Juni 1977 | S.A. des Anciens Etablissements Paul Wurth | Improved tuyere feed device |
| US4171950 | 28. Aug. 1978 | 23. Okt. 1979 | Allis-Chalmers Corporation | Apparatus for re-aiming a coal burner pipe in a rotary kiln |
| US4306643 | 5. Okt. 1979 | 22. Dez. 1981 | The Direct Reduction Corporation | Coal feed pipe and positioner |
| US4685703 | 27. Mai 1986 | 11. Aug. 1987 | Phillips Petroleum Company | Expansible and contractible duct |
| US4987838 | 14. Juli 1989 | 29. Jan. 1991 | Paul Wurth S.A. | Device for injecting preheated air into a shaft furnace |
| US5209657 | 8. Nov. 1991 | 11. Mai 1993 | Paul Wurth S.A. | Device for injecting preheated air into a shaft furnace and process of manufacturing ball-and-socket joints |
| US6176526 | 4. Jan. 1999 | 23. Jan. 2001 | Lever Brother Company division of Conopco | Expansion joint |
