Patent ID: 8850708

Claim:
A pair of blades one or both of which is adapted to be reciprocated along a longitudinal axis, the pair of blades comprising: a first blade having a proximal end, a distal end, a length extending between the proximal end and the distal end, and a cutting edge extending along a portion of the length to the distal end, wherein the cutting edge includes a series of teeth, and wherein a width of the first blade is stepwise reduced along the cutting edge to the distal end so that one or more teeth from the series of teeth has a cutting surface that is receded relative to a tooth from the series of teeth that is closer to the proximal end, and wherein the teeth of the series of teeth are uniformly oriented relative to the longitudinal axis; and a second blade having a proximal end, a distal end, a length extending between the proximal end and the distal end, a cutting edge extending along a portion of the length to the distal end, wherein the cutting edge includes a series of teeth, and wherein a width of the second blade is stepwise reduced along the cutting edge to the distal end so that one or more teeth from the series of teeth has a cutting surface that is receded relative to a tooth from the series of teeth that is closer to the proximal end, and wherein the teeth of the series of teeth are uniformly oriented relative to the longitudinal axis.