POWER OPERATED ROTARY KNIFE

摘要

A power operated rotary knife including an annular rotary knife blade supported for rotation in a blade housing. The rotary knife blade including a body and a blade section extending from the body. The body section including an outer wall including an upper, middle and lower portions. The upper portion of the outer wall including a bearing race extending radially inwardly into the outer wall. The lower portion of the outer wall including the driven gear. In one embodiment, the intermediate portion includes an annular land having an outer surface defining a radially outermost portion of the outer wall of the body, the outer surface of the annular land being radially outward of the driven gear and the bearing race. In another embodiment, the intermediate portion includes an annular channel having an inner surface being radially inward of first and second ends of the bearing race and the driven gear.

主权项

1. An annular rotary knife blade for rotation about a central axis of rotation in a power operated rotary knife, the rotary knife blade comprising:
a body and a blade section extending axially from the body, the body including an upper end and a lower end spaced axially apart and an inner wall and an outer wall spaced radially apart, the outer wall of the body including an upper portion adjacent the upper end of the body, a lower portion adjacent a lower end of the body, and a middle portion disposed between the upper and lower ends of the body, the body and the blade section being radially centered about the central axis of rotation; the blade section extending from the lower end of the body; the upper portion of the outer wall of the body including an annular bearing race axially spaced from an upper end of the body, the middle portion of the outer wall of the body including an annular land axially below the annular bearing race, and the lower portion of the outer wall of the body including an annular driven gear axially below the annular land; the annular bearing race extending radially into the outer wall of the body including a first bearing surface and an axially spaced apart second bearing surface, the first bearing surface and the second bearing surface converging radially inwardly toward a central surface bridging the first and second bearing surfaces, the central surface defining a radially innermost region of the annular bearing race; the annular driven gear including set of gear teeth formed in the outer wall of the body for rotatably driving the annular rotary knife blade about the central axis of rotation, the annular driven gear including an inner surface and a radially spaced apart outer surface, the outer surface defining a radially outermost region of the annular driven gear; and the annular land including a radially outer surface defining a radially outermost portion of the outer wall of the body, the radially outer surface of the annular land being radially outward of the outer surface of the annular driven gear and radially outward of the bearing race.