FIG. 1 is a front perspective view of our design;
FIG. 2 is a front elevational view;
FIG. 3 is an enlarged fragmentary elevational view of a portion of FIG. 2;
FIG. 4 is a rear elevational view;
FIG. 5 is a top plan view;
FIG. 6 is a bottom plan view;
FIG. 7 is a cross sectional view taken along the line 7-7 of FIG. 2;
FIG. 8 is an enlarged fragmentary cross sectional view of a portion of FIG. 7;
FIG. 9 is a left side elevational view;
FIG. 10 is a right side elevational view;
FIG. 11 is a cross sectional view taken along the line 11-11 of FIG. 2;
FIG. 12 is an enlarged fragmentary cross sectional view of a portion of FIG. 11;
FIG. 13 is a front perspective view of a second embodiment of our design;
FIG. 14 is a front elevational view of FIG. 13;
FIG. 15 is an enlarged fragmentary elevational view of a portion of FIG. 14;
FIG. 16 is a rear elevational view of FIG. 13;
FIG. 17 is a top plan view of FIG. 14;
FIG. 18 is a bottom plan view of FIG. 14;
FIG. 19 is a cross sectional view taken along the line 19-19 of FIG. 14;
FIG. 20 is an enlarged fragmentary cross sectional view of a portion of FIG. 19;
FIG. 21 is a left side elevational view of FIG. 14;
FIG. 22 is a right side elevational view of FIG. 14;
FIG. 23 is a cross sectional view taken along the line 23-23 of FIG. 14; and,
FIG. 24 is an enlarged fragmentary cross sectional view of a portion of FIG. 23.
