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US 5,499,667 AGranted
Drill/cutting bit, and method of making structural joint
AssigneeNakanishi Construction Company
InventorTeruo Nakanishi
Life of this patent
Estimating the term…
Abstract
A drill/cutting tool for making joints in wooden members for receiving a metal plate connector. The drill/cutting tool can bore a hole, and then simultaneously cut a smaller width groove and larger width groove from the hole to complete forming the joint. Also, a method of making a joint in wood members.
Claims14
A cutting drill for use in forming holes in wood materials to accept insert protrusions of a metal plate connector used to join wooden members, comprising:
- a shank;
- a body connected to said shank, said body having at least one primary groove with a trailing cutting edge oriented parallel relative to a center longitudinal axis of the bit;
- and
- an end cutting blade connected to said body, said end cutting blade including a side cutting edge and a bottom cutting edge configured for cutting a rectangular groove having a substantially flat bottom, said side cutting edge having a predetermined length and being parallel relative to said trailing cutting edge, said end cutting blade having a greater cutting diameter relative to a cutting diameter of said body.
1 more element
A method for making a joint in a wooden member, comprising the steps of:
- boring a substantially perpendicular hole in a side of said wooden member;
- cutting a first slot of smaller width at a first predetermined depth from a surface of the wooden member while simultaneously cutting a slot of larger width at a second predetermined depth inside said wooden member from said hole in a direction along the side of said wooden member.
Dependencies are inferred from the claim text.