US 4,114,865 AGranted

Silencer for use on tuyere punchers

AssigneeNoranda Mines Limited

InventorsGeorge C. McKerrow, Albert Pelletier, Peter L. Fowler

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Abstract

A silencer for use with a tuyere puncher is disclosed. The silencer comprises a chamber having a front face and a rear face provided with a central opening for passing of the punch bar operated by the puncher, a plurality of closure members located in the rear portion of the chamber and mounted for movement toward and away from the longitudinal axis of the chamber and including means for forcing the closure members against the periphery of the punch bar so as to form a seal between the closure members and the punch bar, and a seal secured to the front face of the chamber for engaging the tuyere to seal such a tuyere before penetration of the punch bar through the tuyere valve. The silencer is mounted on a mobile table which is supported by the puncher and operated in synchronism with the punch bar.

Claims8

Dependent claims

A silencer for use with a tuyere puncher comprising:

(a) a chamber having a front face and a rear face provided with a central opening for passing of a punch bar operated by said puncher;
(b) a plurality of closure members adjacent the rear face of the chamber and mounted for movement toward and away from the longitudinal axis of the chamber and including means for forcing the closure member against the periphery of the punch bar so as to form a seal between the closure members and the punch bar;
(c) a seal secured to the front face of the chamber for engaging the tuyere to seal the tuyere before penetration of the punch bar through the tuyere;
(d) a mobile table slidably mounted on the puncher for supporting said chamber;
and
(e) operating means mounted on the puncher for pushing the mobile table in a straight forward direction to press the chamber against the tuyere before penetration of the punch bar into the tuyere and for withdrawing the chamber after the punch bar is retracted from the tuyere.

3 more elements

Dependencies are inferred from the claim text.