The ornamental design for a compoundgearloppercuttinghead, as shown and described.
FIG. 1 is a right side view of a compound gear lopper cutting head with a top thereof on the left side and with the handles shown in outline showing my design;
FIG. 2 is a left side view of the compound gear lopper cutting head, being the reverse side as shown in FIG. 1 showing my design;
FIG. 3 is bottom view of FIG. 1 showing my design; and,
FIG. 4 is a top view of the compound gear lopper cutting head of FIG. 2 showing my design.
The compound gear lopper cutting head has a cutting jaw and a moving gear arm held together by a link and further having a compound lever between the cutting jaw and the moving gear arm.
The broken lines represent environment and form no part of the claimed design.