Patent ID: 7955021

Claim:
A shaft coupling assembly for use with rotary valves, comprising: an elongated member having a first end and a second end, wherein the first end includes a coupling portion having a first opening configured to receive a rectangular shaft, wherein the coupling portion includes at least one flexible member having an arcuate outer surface and a first inner surface adjacent a second inner surface that at least partially define the first opening, wherein at least a portion of the first inner surface is to engage a first side of the rectangular shaft and at least a portion of the second inner surface is to engage a second side of the rectangular shaft such that a center of curvature of the arcuate outer surface lies inside a corner of the rectangular shaft between the portions of the first inner surface and the second inner surface that engage the respective first and second sides of the rectangular shaft when the rectangular shaft is coupled to the shaft coupling assembly, and wherein the center of curvature is offset from the center of the shaft; and a sleeve having a second opening to receive the elongated member and a tapered third opening configured to receive the coupling portion.