Valve closure gate assembly for foundry ladles

Details Valve closure gate assembly for foundry ladles Valve closure gate assembly for foundry ladles

1984-04-17

1988-01-19

Andrews, Melvyn J.

Metallurgical apparatus

Means for holding or supporting work

Receptacle

266287, 222600, B22D 3700

Patent

active

047200839

ABSTRACT:
The present invention relates to the foundry industry and solves the problem of extended service life of valve closure gate assemblies for foundry ladles. The valve closure gate assembly of the present invention comprises two mutually slidable heat-resistant gates furnished with a protecting layer of an oxide refractory material and having flow-through rings made from an oxide refractory material disposed in the openings of the gates. The respective upper and lower surfaces of the rings are coated with a layer of refractory material.

REFERENCES:
patent: 3685707 (1972-08-01), Shapland
patent: 3743139 (1973-07-01), Lyman
patent: 3801083 (1974-04-01), Mantey et al.
patent: 3841539 (1974-10-01), Shapland, Jr. et al.
patent: 4003561 (1977-01-01), Cudby
patent: 4096976 (1978-06-01), Daussan
patent: 4179046 (1979-11-01), Jeschke et al.
patent: 4182466 (1980-01-01), Fehling et al.
patent: 4241905 (1980-12-01), Eisermann et al.
patent: 4257542 (1981-03-01), Aller et al.

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