The ornamental design for a heatdissipatingdevice, as shown and described.
FIG. 1 is a perspective view of a heat dissipating device showing my new design.
FIG. 2 is a front elevational view of the heat dissipating device.
FIG. 3 is a rear elevational view of the heat dissipating device.
FIG. 4 is a left-side, elevational view of the heat dissipating device.
FIG. 5 is a right-side, elevational view of the heat dissipating device.
FIG. 6 is a top plan view of the heat dissipating device.
FIG. 7 is a bottom plan view of the heat dissipating device; and,
FIG. 8 is another perspective view of the heat dissipating device, showing a heat pipe interconnecting the heat dissipating device and a base, wherein the heat pipe and the base are shown in broken lines for illustrative environmental purposes only and form no part of the claimed design.