Patent ID: 9682492
Date: 2017-06-20
CPC Classifications: B23Q,B27G

Claim:
1. A jig that facilitates the formation of a miter joint in a board by a lock miter router bit, comprising: a flat base having an elevated area and a recessed area; said flat base having four sides, two of said sides being a top edge and a bottom edge that lie in a horizontal plane when the jig is in use, said top edge having a greater extent than said bottom edge, one of said sides being a vertical edge and a fourth side being an oblique edge and extending from said top edge to said bottom edge; said elevated area having the form of a right triangle, including one right angle and two forty five degree (45°) angles; said recessed area including one angle greater than ninety degrees (90°), one forty five degree (45°) angle, and one angle less than forty five degrees (45°); an elongate step formed where said elevated area and said recessed area meet one another, said elongate step being coincident with the hypotenuse of said right triangle; said lock miter router bit having a slot formed therein that accommodates said recessed area when said elongate step abuts a surface of said lock miter router bit; said elongate step adapted to abut said surface of said lock miter router bit when said router bit is oriented to rotate about a vertical axis of symmetry and said recessed area of said jig is received within said slot and is positioned in abutting relation to said router bit with said flat base oriented in a vertical plane.