I claim the ornamental design for a clamp assembly, as shown and described.
FIG. 1 is a front, top and right side perspective view of a clamp assembly;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a right side elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is another front, top and right side perspective view thereof, shown in an environment of use.
The broken lines shown in FIGS. 1-7 illustrate portions of the clamp assembly that form no part of the claimed design. The broken lines illustrating the clamp assembly support in FIG. 8 are environment, while the remaining broken lines in FIG. 8 illusrate portions of the clamp assembly that form no part of the claimed design.