Drive mechanism for a stopper in a molten metal vessel

Details Drive mechanism for a stopper in a molten metal vessel Drive mechanism for a stopper in a molten metal vessel

1994-04-13

1995-06-06

Kastler, Scott

Metallurgical apparatus

With control means responsive to sensed condition

266236, 222602, B22D 4120

Patent

active

054215595

ABSTRACT:
A stopper drive mechanism is removably mounted on a molten metal vessel having a discharge opening and is adapted to move a stopper into and out of closing engagement with the discharge opening. A piston and cylinder unit of the stopper drive mechanism is operably connected with the stopper and has a valve unit connected thereto for controlling the piston and cylinder unit. The piston and cylinder unit comprises a cylinder that defines a working chamber with a piston slidably disposed therein. The piston has the same effective working area on opposite sides thereof. The valve unit comprises a control valve for controlling the flow of hydraulic fluid to and from the opposite sides of the piston and a bypass valve that is adapted to selectively communicate opposite sides of the piston with each other for manual movement of the stopper.

REFERENCES:
patent: 2832110 (1958-04-01), Carleton, Jr.
patent: 3733014 (1973-05-01), Pflaum
patent: 5312090 (1994-05-01), Seaton et al.

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