Patent ID: 9051726
Filing Date: 2015-06-09
Classification: B25B,E04B,F16B,Y10T

Abstract:
1. A method of installing a screw to secure a board to an underlying joist, the method comprising: providing a board including a top surface laying in a first plane, a bottom surface opposite the top surface and parallel to the top surface, the bottom surface laying in a second plane, and a side surface laying in a third plane, the third plane being substantially perpendicular to the first plane and the second plane, the side surface joined with the top surface and the bottom surface; placing the bottom surface of the board over an underlying joist; aligning a screw along an advancement axis at an angle relative to and non-orthogonal with the third plane of the side surface of the board, the advancement axis passing through the first plane, the second plane and the third plane, the screw including a screw axis, a shaft, and a thread that coils around the shaft and terminates adjacent a chisel brake point including a pair of opposing inclined surfaces that intersect at a chisel edge, the inclined surfaces being disposed at an angle of about 90° to about 150° relative to one another, the thread configured to advance the fastener at a theoretical feed rate; rotating the screw so that the chisel brake point penetrates the side surface of the board; pre-boring a hole with the chisel brake point in the board along the advancement axis, at least a portion of the thread scooping material from the pre-bored hole and augering the material up the thread out of the pre-bored hole; advancing the fastener along the advancement axis at a second feed rate that is less than the theoretical feed rate in at least a portion of the board, with the chisel brake point retarding the advancing so that the fastener advances at the second feed for a preselected distance between the side surface and bottom surface of the board; penetrating the bottom surface of the board with the chisel brake point; penetrating a surface of the underlying joist; advancing the fastener along the advancement axis at a third feed rate that is greater than the second feed rate into the underlying joist, the threads overcoming at least a portion of the retarding of advancing provided by the chisel brake point by engaging the pre-bored hole and material surrounding the pre-bored hole; and ceasing the advancing when the screw is substantially positioned in the pre-bored hole and joins the board to the underlying joist, wherein the thread of the fastener includes a leading portion, wherein the leading portion forms an extension of the chisel edge and the chisel edge is configured asymmetrically about the screw axis, wherein the extension assists in pre-boring the hole.