Ejector piston

Details Ejector piston Ejector piston

1976-11-22

1977-12-20

Dost, Gerald A.

Metallurgical apparatus

Means sealing or opening aperture in vessel

By means plugging aperture

C21B 712

Patent

active

040637220

ABSTRACT:
Leakage of viscous material past an ejector piston, for example the piston of a clay gun employed in plugging blast furnace tapholes, is eliminated by a piston and ring design which exposes in excess of 50% of the leading and inner diameter surfaces of an expandable ring directly to the viscous material. Also, the leading face of the piston ring is outwardly inclined in the direction of piston travel and a complementary surface to this inclined face is provided on the piston. Expansion of the ring results from the reaction on the inclined face and inner diameter of the pressurized viscous material.

REFERENCES:
patent: 1365578 (1921-01-01), Zippler
patent: 2110379 (1938-03-01), Lannert
patent: 2529053 (1950-11-01), Simmons
patent: 3834719 (1974-09-01), Shin et al.
patent: 3984091 (1976-10-01), Schneider

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