The ornamental design for an imagingsystem pivot arm, as shown and described.
FIG. 1 is a perspective view of an embodiment of an imaging system pivot arm showing our new design;
FIG. 2 is a right side elevation view thereof, with the left side elevation view being a mirror image;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a front elevation view thereof;
FIG. 6 is a rear elevation view thereof;
FIG. 7 is a perspective view of another embodiment of an imaging system pivot arm showing our new design;
FIG. 8 is a right side elevation view thereof, with the left side elevation view being a mirror image;
FIG. 9 is a top plan view thereof;
FIG. 10 is a bottom plan view thereof;
FIG. 11 is a front elevation view thereof; and,
FIG. 12 is a rear elevation view thereof.
The broken lines in the drawings are included for the purpose of illustrating portions of the imaging system pivot arm that form no part of the claimed design.