FIG. 1 is a front perspective view of our design;
FIG. 2 is a front elevational view;
FIG. 3 is a rear elevational view;
FIG. 4 is an enlarged view of the encircled portion of FIG. 1;
FIG. 5 is a top plan view;
FIG. 6 is a bottom plan view;
FIG. 7 is a cross sectional view taken along line 7-7 in FIG. 2;
FIG. 8 is a cross sectional view taken along line 8-8 in FIG. 2;
FIG. 9 is an enlarged fragmentary cross sectional view of the encircled portion of FIG. 7;
FIG. 10 is an enlarged fragmentary cross sectional view of the encircled portion of FIG. 8;
FIG. 11 is a right side elevational view;
FIG. 12 is a left elevational view;
FIG. 13 is a cross sectional view taken along line 13-13 in FIG. 2;
FIG. 14 is an enlarged fragmentary cross sectional view of the encircled portion of FIG. 13;
FIG. 15 is an enlarged fragmentary cross sectional view of the encircled portion of FIG. 13;
FIG. 16 is a front perspective view of a second version of our design;
FIG. 17 is a front elevational view;
FIG. 18 is a rear elevational view;
FIG. 19 is an enlarged view of the encircled portion of FIG. 16;
FIG. 20 is a top plan view;
FIG. 21 is a bottom plan view;
FIG. 22 is a cross sectional view taken along line 22-22 in FIG. 17;
FIG. 23 is a cross sectional view taken along line 23-23 in FIG. 17;
FIG. 24 is an enlarged fragmentary cross sectional view of the encircled portion of FIG. 22;
FIG. 25 is enlarged fragmentary cross sectional view of the encircled portion of FIG. 23;
FIG. 26 is a right side elevational view;
FIG. 27 is a left elevational view;
FIG. 28 is a cross sectional view taken along line 28-28 in FIG. 17;
FIG. 29 is an enlarged fragmentary cross sectional view of the encircled portion of FIG. 28; and,
FIG. 30 is an enlarged fragmentary cross sectional view of the encircled portion of FIG. 28.
The dash-dot-dot-dash broken lines in the figures depict the limits of the enlarged view and form no part of the claimed design.