The ornamental design for a curvedbelt, as shown and described.
FIG. 1 is a full layout view of our new curved belt design without the buckle;
FIG. 2 is a front elevation view of our curved belt;
FIG. 3 is a view of our curved belt as it conforms to the human body;
FIG. 4 shows a back view our curved belt as it looks on a person wearing it;
FIG. 5 shows a side view of our curved belt as it looks on a person wearing it; and,
FIG. 6 shows a front view of our curved belt as it looks on a person wearing it.
The broken lines showing a belt buckle and loop in FIGS. 2, 3, and 6 and showing a human form in FIGS. 3-6 depict environmental subject matter only and form no part of the claimed design.