| 摘要 |
<p>A gas-tight seal for the closure of a perimeter space between a duct and a surrounding structure, which space changes due to axial or lateral relative expansion movements of the duct or structure, comprising a spring tempered metal annular diaphragm of generally axially extending sideways overlapping strips or leaf springs, the diaphragm being fixed to an annular member for fixing in relation to the duct or the structure with one margin and sliding with the face of the other margin over a generally axially extending annular seating face under spring pressure of the diaphragm. The spring pressure of the diaphragm may be assisted by bias leaf springs.</p> |
