EP 0056224 B1 19840516 - ELECTRIC FURNACE, SUCH AS AN ELECTRIC-ARC FURNACE OR PLASMA MELTING FURNACE
Title (en)
ELECTRIC FURNACE, SUCH AS AN ELECTRIC-ARC FURNACE OR PLASMA MELTING FURNACE
Publication
Application
Priority
AT 3081 A 19810108
Abstract (en)
[origin: US4423515A] In an electric furnace a lifting means actuating the furnace cover includes a king post supported on the base. The king post is surrounded by a sleeve, which is liftable and lowerable relative to the same and has a cap on its upper end. The sleeve is hydraulically liftable and engageable with a cover carrying framework carrying the furnace cover. In order to provide for a lifting means with a low weight without constraining forces and with a structurally simple lubrication, a cylinder space to which a hydraulic medium is admitted is provided between a front face of the king post and the cap of the sleeve acting in the lifting direction. If desired, an annular space is provided between a collar of the king post and the inner wall of the sleeve, to which a hydraulic medium is provided, acting in the lowering direction.
IPC 1-7
IPC 8 full level
F15B 15/14 (2006.01); F27B 3/08 (2006.01); F27B 3/10 (2006.01); F27B 3/16 (2006.01); H05B 7/02 (2006.01)
CPC (source: EP US)
F27B 3/085 (2013.01 - EP US); F27B 3/16 (2013.01 - EP US); H05B 7/02 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE GB IT LI LU SE
DOCDB simple family (publication)
EP 0056224 A1 19820721; EP 0056224 B1 19840516; AT 370871 B 19830510; AT A3081 A 19820915; DE 3163688 D1 19840620; JP S57142475 A 19820903; JP S6181598 U 19860530; JP S6317989 Y2 19880520; US 4423515 A 19831227
DOCDB simple family (application)
EP 81890210 A 19811223; AT 3081 A 19810108; DE 3163688 T 19811223; JP 16649785 U 19851028; JP 219382 A 19820108; US 33689682 A 19820104