The ornamental design for a pivoting towelbar, as shown and described.
FIG. 1 is an isometric view of a pivoting towel bar embodying the design, with towel bar brackets and a pivoting assembly being shown in broken lines for illustrative purposes only and forming no part of the claimed design;
FIG. 2 is a front elevation view of the pivoting towel bar of FIG. 1 and illustrating the towel bar brackets and the pivoting assembly in broken lines for illustrative purposes only so as not to form any part of the claimed design;
FIG. 3 is a right side elevation view of the pivoting towel bar of FIG. 1 and illustrating the towel bar brackets and the pivoting assembly in broken lines for illustrative purposes only so as not to form any part of the claimed design;
FIG. 4 is a left side elevation view of the pivoting towel bar of FIG. 1 and illustrating the towel bar brackets and the pivoting assembly in broken lines for illustrative purposes only so as not to form any part of the claimed design;
FIG. 5 is a top-down plan view of the pivoting towel bar of FIG. 1 and illustrating the towel bar brackets and the pivoting assembly in broken lines for illustrative purposes only so as not to form any part of the claimed design;
FIG. 6 is a rear elevation view of the pivoting towel bar of FIG. 1 and illustrating the towel bar brackets and the pivoting assembly in broken lines for illustrative purposes only so as not to form any part of the claimed design; and,
FIG. 7 is a bottom-up plan view of the pivoting towel bar of FIG. 1 and illustrating the towel bar brackets and the pivoting assembly in broken lines for illustrative purposes only so as not to form any part of the claimed design.