Reversible bolt-on piercing tip

摘要

A piercing tip assembly has two piercing tips, each having two sets of piercing and shearing edges. The tip is reversible so that the tip can be detached from the shears, its orientation changed, and replaced on the shears so a fresh, sharp set of piercing and shearing edges is exposed during use. The tips are reverse by rotating each tip and replacing the tip mounted on the right side of the jaw, and switching the tip on the left side of the jaw to the right side, and the tip on the right side of the jaw to the left side. The piercing tip assembly protects a substantial portion of the upper jaw of a metal shears from wear.

主权项

1. A piercing tip for metal shears comprising:
a central portion joining two distal cutting portions, the two cutting portions each having a piercing edge and a shearing edge; a plane of symmetry defined by the central portion and the two cutting portions and passing through the central portion, wherein the two cutting portions are symmetrical about the plane of symmetry; a generally planar outside surface defined by each of the central portion and the two cutting portions; an inside surface formed on the central portion opposite the outside surface, wherein the cutting portions are each elevated above the inside surface in a direction away from the outside surface; wherein each cutting portion is elongated and defines the piercing edge at one end thereof and a fillet end at the opposite end thereof in a direction of the elongation; wherein the generally planar outside surface formed by the central portion and the two cutting portions is bowtie-shaped; and wherein the perimeter of the outside surface is defined by a concave pocket formed in the central portion, two forward edges extending from the concave pocket, the shearing edge of each of the two cutting portions intersecting with a respective one of the forward edges, and a pair of back edges, each back edge intersecting with a respective one of the shearing edges, and wherein an obtuse angle is formed between the pair of back edges.