Expandable sealing mechanism

FIG. 1 is a perspective view of an expandable sealing mechanism;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a side elevation view thereof, it being understood that left and right sides views of the expandable sealing mechanism are identical;

FIG. 6 is a bottom perspective, exploded view thereof; and,

FIG. 7 is a side elevation, cross-sectional view taken along line 7 - 7 as shown in of FIG. 5 .

The broken lines depict portions of the article that form no part of the claimed design.