Connecting sleeve for extension ladder

FIG. 1 is a perspective view of a connecting sleeve for extension ladder showing a first embodiment of my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is an enlarged left side view thereof;

FIG. 5 is an enlarged right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a perspective view thereof in a state of use;

FIG. 9 is a perspective view of a connecting sleeve for extension ladder showing a second embodiment of my new design;

FIG. 10 is a front view thereof;

FIG. 11 is a rear view thereof;

FIG. 12 is an enlarged left side view thereof;

FIG. 13 is an enlarged right side view thereof;

FIG. 14 is a top view thereof;

FIG. 15 is a bottom view thereof; and,

FIG. 16 is a perspective view thereof in a state of use.

The broken lines illustrate portions of the connecting sleeve for extension ladder that form no part of the claimed design. The broken line showing of the extension ladder in FIGS. 8 and 16 illustrates environmental structure that also forms no part of the claimed design.