The ornamental design for a portable electric hammer drill, as shown and described.
FIG. 1 is a front perspective view of a portable electric hammer drill in accordance with our new design;
FIG. 2 is a rear perspective view of the portable electric hammer drill in accordance with our new design;
FIG. 3 is a front elevational view of the portable electric hammer drill in accordance with our new design;
FIG. 4 is a rear elevational view of the portable electric hammer drill in accordance with our new design;
FIG. 5 is a top plan view of the portable electric hammer drill in accordance with our new design;
FIG. 6 is a bottom plan view of the portable electric hammer drill in accordance with our new design;
FIG. 7 is a left side elevational view of the portable electric hammer drill in accordance with our new design;
FIG. 8 is a right side elevational view of the portable electric hammer drill in accordance with our new design; and,
FIG. 9 is a front perspective view, similar to FIG. 1 of the portable electric hammer drill in accordance with our new design illustrating a state in which rechargeable batteries are attached to the portable electric hammer drill.
The broken line showings of the side handle and rechargeable batteries in FIG. 9 are provided for the purpose of illustrating environmental structure; whereas the broken line showing in FIG. 6 illustrate portions of the portable electric hammer drill. These broken line subject matters do not form part of the claimed design.