The ornamental design for a casterwheellock, as shown and described.
FIG. 1 is a perspective view of a caster wheel lock of my new design;
FIG. 2 is a top plan view of the caster wheel lock of FIG. 1;
FIG. 3 is a bottom plan view of the caster wheel lock of FIG. 1;
FIG. 4 is a right side elevation view of the caster wheel lock of FIG. 1;
FIG. 5 is a left side elevation view of the caster wheel lock of FIG. 1;
FIG. 6 is a front elevation view of the caster wheel lock of FIG. 1; and,
FIG. 7 is a rear elevation view of the caster wheel lock of FIG. 1.
The dash-dash broken lines in the drawings are for the purpose of illustrating portions of the caster wheel lock that form no part of the claimed design. The dot-dot-dash broken lines in the drawings are for the purpose of illustrating the boundary of the claimed design, and form no part of the claimed design.