Extraction device and wear ring for a rotatable tool
AssigneeThe Sollami Company
InventorPhillip Sollami
Life of this patent
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Abstract
A tool has a tapered forward cutting end behind which is a cylindrical shank. A rearwardly facing annular flange separates the forward cutting end from the shank. The shank is received in a tool holder having a planar forward surface, and fitted around the shank of the tool is an annular wear ring. The outer diameter of the wear ring is less than the outer diameter of the radial flange and less than the diameter of the forward end of the tool holder. The thickness of the wear ring forms a gap on opposite sides of the wear ring between a portion of the tool holder and a portion of the radial flange of the tool. Spaced apart prongs of an extraction tool can be fitted into the gaps to extract the tool from the tool holder.
Claims12
The combination comprising:
- a tool having a tapered forward cutting end, a rearwardly facing radial flange at a rear of said tapered forward cutting end, said radial flange having a diameter defining a first dimension, and a cylindrical shank extending axially rearward of said radial shank,
- a tool holder having a forward surface, a cylindrical bore opening in said forward surface, an outer surface intersecting an outer peripheries of said forward surface wherein diametrically opposing portions of said intersecting surfaces define a second dimension,
- a wear ring on said shank between said radial flange and said forward surface, said wear ring having an outer end defining a width, said width having a third dimension that is less than both said first dimension and said second dimension wherein a spacing remains between a portion of said flange and a portion of said forward surface, and
- an extraction tool having a pair of parallel members defining a fork and an impact portion that can be struck by the head of a hammer wherein a portion of said parallel member is receivable in said spacing for removing said tool from said tool holder and wherein a hammer strike against said impact portion will aid in the removal of said tool from said tool holder.
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Dependencies are inferred from the claim text.