The ornamental design for a combined rotatablegatevalveshaft with coupler, as shown and described.
FIG. 1 is a front view of a combined rotatable gate valve shaft with coupler; the back view being a mirror image;
FIG. 2 is a left side view thereof, the right side view being a mirror image;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is an isometric view thereof; and,
FIG. 6 is a front view thereof in a condition of use.
The evenly segmented lines drawn in FIGS. 1-3, 5, and 6 are unclaimed transitional features adjacent to the threaded portion of the combined rotatable gate valve shaft with coupler. The dotted lines drawn in FIGS. 1, 5, and 6 are an unclaimed hole on the hex portion. The dash dot dot lines drawn in FIGS. 1-6 are unclaimed bolt heads on the coupler. The broken lines in FIG. 4 are unclaimed surface areas. The dash dot lines in FIG. 6 show environmental structure associated with the claimed invention in condition of use, and which forms no part of the claimed design.