The ornamental design for a staffmember and ribassembly for an umbrella, as shown and described.
FIG. 1 is a perspective view from the bottom and one side of the staff member and rib assembly for an umbrella in accordance with the present invention showing a single pair of ribs;
FIG. 2 is a front elevational view of the staff member and rib assembly;
FIG. 3 is a rear elevational view of the staff member and rib assembly;
FIG. 4 is a left side elevational view of the staff member and rib assembly, the right side elevational view being a mirror image thereof;
FIG. 5 is an elevational view of the staff member and rib assembly taken from a vantage point midway between the front and left side elevational views;
FIG. 6 is a top plan view of the staff member and rib assembly; and,
FIG. 7 is a bottom plan view of the staff member and rib assembly.
The broken lines in the drawings are for the purpose of illustrating and form no part of the claimed design.
The broken lines depict environmental subject matter and form no part of the claimed design.