The ornamental design for a poleclamp, as shown and described.
FIG. 1 is a side view of a pole clamp;
FIG. 2 is a top view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a three-quarter top view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a back view thereof;
FIG. 7 is a three-quarter bottom view thereof;
FIG. 8 is a three-quarter side view of the pole clamp opened to a first degree;
FIG. 9 is a three-quarter side view of the pole clamp opened to a second degree; and,
FIG. 10 is the pole clamp attached to a pole.
The broken lines within the pole clamp and outside the pole clamp in FIGS. 1-10 represent portions of the pole clamp and the environment which form no part of the claimed design.