Earthworking tool for protecting from abnormally high cutting loads
AssigneeKennametal Inc.
InventorRobert H. Montgomery, Jr.
Life of this patent
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Abstract
There is disclosed a base and block assembly for use with an earthworking bit. The assembly comprises a base and a block engaged in the base. The block has a shank portion and a toolholder portion extending from a first end of the shank and adapted for receiving the earthworking bit. The assembly also comprises means for causing the block to preferentially fail when exposed to abnormally high cutting loads. Also disclosed is a method for protecting the base of a base and block assembly when in use with an earthworking bit. The method comprises preferentially weakening the block so as to cause the block to fail when exposed to abnormally high cutting loads and engaging the block with the base.
Claims16
An assembly for use with an earthworking bit, comprising:
- a base having a T-shaped recess formed by the intersection of a vertical slot and a horizontal slot;
- a block engaging said base, said block having a shank portion and a toolholder portion extending from a first end of said shank and adapted for receiving an earthworking bit;
- said block having a T-shaped portion extending from a second end of said shank portion with said T-shaped portion slidably engaging said groove;
- and said shank having means for causing said block to preferentially fail when exposed to abnormally high cutter loads and located between said toolholder portion and said T-shaped portion.
A block for use with an earthworking bit, comprising:
- a shank portion;
- a toolholder portion extending from a first end of said shank and adapted for receiving an earthworking bit;
- said block having a T-shaped portion extending from the second end of said shank portion, said T-shaped portion adapted for slidable engagement with a groove in a base member;
- and said shank having means for causing said block to preferentially fail when exposed to abnormally high cutting loads located between said toolholder portion and said T-shaped portion.
Dependencies are inferred from the claim text.