Industrial electric heating furnaces – Arc furnace device – Charging or discharging
Patent
1982-01-04
1983-12-27
Envall, Jr., Roy N.
Industrial electric heating furnaces
Arc furnace device
Charging or discharging
91216A, 92117R, F27D 118
Patent
active
044235151
ABSTRACT:
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.
REFERENCES:
patent: 1818239 (1931-08-01), Moore
patent: 3181436 (1965-05-01), McCreery
Riegler Ernst
Zajicek Ernst
Envall Jr. Roy N.
Voest-Alpine Aktiengesellschaft
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