Sleeve coupling

FIG. 1 is a front plan view of a first embodiment of the sleeve coupling;

FIG. 2 is a front perspective view of the sleeve coupling of FIG. 1;

FIG. 3 is a top view of the sleeve coupling of FIG. 1;

FIG. 4 is a bottom view of the sleeve coupling of FIG. 1;

FIG. 5 is a front plan view of a second embodiment of the sleeve coupling;

FIG. 6 is a front perspective view of the sleeve coupling of FIG. 5;

FIG. 7 is a top view of the sleeve coupling of FIG. 5;

FIG. 8 is a bottom view of the sleeve coupling of FIG. 5;

FIG. 9 is a front plan view of a third embodiment of the sleeve coupling;

FIG. 10 is a front perspective view of the sleeve coupling of FIG. 9;

FIG. 11 is a top view of the sleeve coupling of FIG. 9;

FIG. 12 is a bottom view of the sleeve coupling of FIG. 9;

FIG. 13 is a front plan view of a fourth embodiment of the sleeve coupling;

FIG. 14 is a front perspective view of the sleeve coupling of FIG. 13;

FIG. 15 is a top view of the sleeve coupling of FIG. 13;

FIG. 16 is a bottom view of the sleeve coupling of FIG. 13;

FIG. 17 is a front plan view of a fifth embodiment of the sleeve coupling;

FIG. 18 is a front perspective view of the sleeve coupling of FIG. 17;

FIG. 19 is a top view of the sleeve coupling of FIG. 17; and,

FIG. 20 is a bottom view of the sleeve coupling of FIG. 17.

The broken line showing of a sleeve structure is for illustrative purposes only and forms no part of the claimed design.