Patent ID: 7021817

Claim:
A mixing element for use with a mixer having a mixer output shaft with transversely-extending first and second driving pins, wherein the mixing element comprises: a mixing-element body including a collar portion having a keyway for attachingly receiving a mixer output shaft therein and a mixing portion extending downward from the collar portion, wherein the keyway has; a) keyway opening having a longitudinal axis, b) a shaft-receiving passageway extending longitudinally downward from the keyway opening, and c) first and second pin-receiving pathways surrounded by the mixing-element body, each of the first and second pin-receiving pathways projecting outward from the shaft-receiving passageway and each including an entry portion and a torque-receiving portion spaced from the entry portion, wherein an upper edge of each pin-receiving pathway along a region of each pin-receiving pathway extending from its entry pad to its torque-receiving portion does not exceed a depth of 1.0 inches from a top of the collar portion.