Abstract: A power operated rotary knife having a reusable handle assembly and disposable blade support assembly including a head portion and a blade support portion extending from the head portion, wherein upon completion of a tissue debriding operation on a donor, the used blade support assembly is removed from the handle assembly and disposed of, the handle assembly is autoclaved/sterilized and a new, sterilized blade support assembly is affixed to the handle assembly prior to a subsequent use. The knife includes an attachment assembly to releasably attach the disposable blade support assembly to the handle assembly and a retainer structure positioned in an annular groove formed in a bottom surface of the blade housing portion, the retainer structure bearing against an annular rotary knife blade and the blade housing portion to permanently retain an annular body section of the blade in the annular groove.

Abstract: A power operated rotary knife having a reusable handle assembly and disposable blade support assembly including a head portion and a blade support portion extending from the head portion, wherein upon completion of a tissue debriding operation on a donor, the used blade support assembly is removed from the handle assembly and disposed of, the handle assembly is autoclaved/sterilized and a new, sterilized blade support assembly is affixed to the handle assembly prior to a subsequent use. The knife includes an attachment assembly to releasably attach the disposable blade support assembly to the handle assembly and a retainer structure positioned in an annular groove formed in a bottom surface of the blade housing portion, the retainer structure bearing against an annular rotary knife blade and the blade housing portion to permanently retain an annular body section of the blade in the annular groove.

Abstract: A method for trimming an undesirable portion of a metatarsal pad of a chicken paw using a power operated rotary knife. The steps of the method include: a) providing a power operated rotary knife including an annular knife blade rotatable about a central axis and defining a central open area; moving one of the rotary knife and the chicken paw with respect to the other to position the rotary knife with respect to a bottom of the chicken paw such that the undesirable portion of the metatarsal pad is within the central open area of the blade and the cutting edge of the blade is proximate to a periphery of the undesirable portion; and moving one of the rotary knife and the chicken paw such that the cutting edge of the blade slices a layer of the metatarsal pad thereby removing at least part of the undesirable portion.

Abstract: A sharpener for blades comprises a movable blade-sharpening surface, a stationary blade guide supported closely adjacent the surface, and a movable support for a blade. The support comprises pivotally interconnected first and second links and a blade holder. The first link is pivotably supported at a location fixed with respect to the blade guide, the second link supports the blade holder adjacent a distal end of the second link. The links support the blade holder for movement in first directions toward and away from the blade-sharpening surface, in second directions transverse to the first directions, and in third directions transverse to the first and second directions. The blade holder is pivotably supported on the second link, with the links and pivots being located and ganged to support the blade holder adjacent the blade guide for movement in three substantially mutually perpendicular directions relative to the blade guide and blade-sharpening surface.