Drill bit screw tip
AssigneeIrwin Industrial Tool Company
InventorLaverne R. Durfee
Life of this patent
Estimating the term…
Abstract
A drill bit comprises a shank having a longitudinal axis. A cutting head is formed at one end of the shank. A removable and replaceable pilot tip such as a screw tip or pilot point is formed on the cutting head. The pilot tip is designed for controlled failure. A tool is also provided for removing the broken tip. A kit comprising a dill bit adapted to receive a removable tip, a removable tip for attachment to the cutting head, and/or a removal tool for removing a broken tip from the drill bit. A method for removing a tip from a drill bit and replacing it with another tip is also provided.
Claims20
A dill bit comprising:
- a shaft;
- a cutting head formed on the shaft;
- a removable tip threadably engaged with the cutting head, said removable tip having a controlled break point where the tip will break if a force above a predetermined force is applied to the tip.
A kit comprising:
- a dill bit adapted to receive a removable tip;
- a removable tip for engaging the cutting head, said removable tip having a controlled break point where the tip will break if a force above a predetermined force is applied to the tip;
- and
- a removal tool for removing a broken tip from the drill bit.
A kit comprising:
- a plurality of removable tips for engaging a cutting head of a drill bit;
- and
- a removal tool dimensioned to engage tip for removing a broken tip from the drill bit.
A method for removing a tip from a drill bit comprising:
- providing a cutting head on the drill bit;
- providing a removable tip;
- providing a controlled break point on the tip;
- defining a cavity between the tip and the cutting head for receiving a tool:
- inserting a tool into said cavity to remove the tip from the cutting head;
- inserting another tip into the cutting head.
Dependencies are inferred from the claim text.