FIG. 1 is a right elevational view of the accumulator; FIG. 2 is a front elevational view thereof; FIG. 3 is left elevational view a thereof; FIG. 4 is a rear elevational view thereof; FIG. 5 is a top plan view thereof; FIG. 6 is a bottom plan view thereof; and, FIG. 7 is a front left perspective view thereof.