Power driven meat trimming and cutting knife

Claim 2

In a knife of the character described, a knife blade having an arcuate cutting edge, power-actuated means for oscillating said blade through a predetermined arc about the axis of said cutting edge, said power-actuated means including a splined shaft, said blade conforming to the shape of an inverted cone, whose axis is the axis of said shaft, a lever arm for oscillating said shaft, means for causing oscillatory movement of said lever arm, a knife-blade supporting frame comprising a central portion splined to said shaft, and downwardly and forwardly extending arms to which the ends of said blade are secured, and handle means for drawing said knife in a substantially linear direction, as said blade is oscillated.

Claim 3

In a knife of the character described, an elongated housing having a handle portion and a forward portion, a vertical shaft journalled for rotation in said forward portion and having its axis substantially perpendicular to the direction of elongation of said housing, a knife blade of curved conformation disposed substantially below said housing and having a cutting edge at its lower end which cutting edge lies in a plane angularly disposed toward the axis of said shaft and said direction of elongation of said housing, said blade having as its axis of curvature the axis of said shaft, means for supporting said blade, said means comprising at least two arms secured to said shaft spaced circumferentially thereof and extending radially therefrom to said blade, and means disposed within said housing for oscillating said shaft about its axis and said blade through a predetermined arc.

Claim 4

In a knife of the character described, an elongated housing having a handle portion and a forward portion, a vertical shaft journalled for rotation in said forward portion and having its axis substantially perpendicular to the direction of elongation of said housing, a knife blade of curved conformation disposed substantially below said housing and having a cutting edge at its lower end which cutting edge lies in a plane angularly disposed toward the axis of said shaft and said direction of elongation of said housing, said blade having as its axis of curvature the axis of said shaft, means for supporting said blade, said means comprising at least two arms secured to said shaft spaced circumferentially thereof and extending radially therefrom to said blade, and means disposed within said housing for oscillating said shaft about its axis and said blade through a predetermined arc.

Claim 5

A knife, as defined in claim 2, wherein said blade conforms to the shape of an inverted cone, whose axis is the axis of said shaft.

Claim 6

A knife, as defined in claim 3, wherein said blade-supporting arms extend downwardly from said shaft to said blade.

Claim 7

A knife, as defined in claim 4, wherein the longitudinal center line of said housing and the axis of said shaft lie in a common vertical plane which bisects said knife blade.

Claim 8

In a knife of the character described, an elongated housing having a handle or manual gripping portion, a shaft carried by said housing and journalled thereto about an axis substantially perpendicular to the longitudinal axis of said housing for rotation therein, power-driven means mounted in said housing and connected to said shaft for imparting oscillating movement thereto, a knife blade having the conformation of a segment of an inverted cone whose axis is the axis of said shaft, said knife blade being mounted in fully exposed position below said housing and connected adjacent its ends to said shaft for oscillatory movement therewith, said knife blade having a cutting edge lying in a plane below said housing and normal to said axis of rotation, the radius of said cutting edge intersecting the axis of said shaft, and having a trailing edge in a plane above and parallel to said last-named plane and uniformly displaced from said cutting edge, whereby to provide between the cutting edge and trailing edge a glide surface inclined to the direction of the linear cutting movement of said knife to displace the cuttings made by said knife.

Claim 9

In a knife of the character described, an elongated housing having a handle or manual gripping portion, a shaft carried by said housing and journalled thereto about an axis substantially perpendicular to the longitudinal axis of said housing for rotation therein, power-driven means mounted in said housing and connected to said shaft for imparting oscillating movement thereto, a knife blade having the conformation of a segment of an inverted cone whose axis is the axis of said shaft, said knife blade being mounted in fully exposed position below said housing and connected adjacent its ends to said shaft for oscillatory movement therewith, said knife blade having a cutting edge lying in a plane below said housing and normal to said axis of rotation, the radius of said cutting edge intersecting the axis of said shaft, and having a trailing edge in a plane above and parallel to said last-named plane and uniformly displaced from said cutting edge, whereby to provide between the cutting edge and trailing edge a glide surface inclined to the direction of the linear cutting movement of said knife to displace the cuttings made by said knife.