F - Mech Eng,Light,Heat,Weapons – 27 – D
Patent
F - Mech Eng,Light,Heat,Weapons
27
D
277/30, 39/98
F27D 3/15 (2006.01) C21B 7/12 (2006.01) F16J 9/08 (2006.01) F16J 9/20 (2006.01)
Patent
CA 1061108
ABSTRACT OF THE DISCLOSURE An apparatus for plugging the taphole of a shaft furnace, including a cylinder having a longitudinal axis from which the material is expelled under pressure via an opening of reduced diameter and, an improved ejector piston for installation in the cylinder comprising a piston body, a holding plate affixed to said portion body at the forward end thereof in the direction of piston travel during the delivery stroke to expel material from the cylinder, said holding plate cooperating with said piston body to define a groove about the periphery of said piston body, said holding plate presenting a discontinuous surface to material in the cylinder in front of the piston body, and resilient piston ring means disposed in said groove, said piston ring means including at least one ring member having a leading face inclined radially outwardly and forwardly with respect to said axis, a portion of said inclined ring member face being directly exposed to material in the cylinder.
265896
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