Importance

Loading Importance Indicators...

Abstract

A stopper rod in the form of an elongate molded body having a longitudinal bore has an attachment device for attaching the stopper rod to a lifting and lowering mechanism. The attachment device comprises a first sleeve to be molded in-situ in the stopper rod body to lie coaxially with the stopper rod body in an annular recess surrounding and coterminous with the bore, the sleeve having a pair of circumferentially-spaced inwardly-directed, arcuate flanges, a connecting rod of diameter to fit into the stopper rod bore and of length to extend outside the stopper rod while passing through the first sleeve when the sleeve is in position in the stopper rod, the connecting rod having a pair of circumferentially-spaced, arcuate shoulders of size to pass through the spaces between the flanges of the first sleeve, so that the connecting rod may be passed through the first sleeve until its shoulders have passed beyond the flanges of the first sleeve and then rotated until its shoulders are in circumferential correspondence with the flanges, and a second sleeve of external diameter to fit in the bore of the stopper rod and having at one end a pair of circumferentially-spaced, arcuate, axially-extending projections, the projections having an internal radius sufficient to accommodate the connecting rod through the second sleeve and the projections being of a size to fit into the spaces between the flanges of the first sleeve so that the shoulders of the connecting rod may be locked beyond the flanges of the first sleeve.

Loading the Abstract Image...

First Claim