Patent ID: 8365638
Filing Date: 2013-02-05
Classification: B23K,B26F,E21B,Y10T

Abstract:
1. A method of manufacturing an auger, comprising the steps of: providing a tubular body extending along a central axis between a top end of the body and a bottom end of the body, said tubular body having an upper portion and a lower portion; providing a precision cutting tool for cutting apertures through, and notches in, said tubular body; cutting three equally spaced rectangular apertures through the upper portion of said tubular body; cutting a tab from a top portion of each said rectangular aperture; cutting three equally spaced elongated pentagonal apertures having a triangular vertex through the lower portion of said tubular body with said triangular vertex proximate to said tubular body bottom end; cutting three pairs of teeth at said body bottom end; cutting a downwardly-open U-shaped notch between each tooth pair, and a downwardly-open U-shaped notch between each tooth of each tooth pair; cutting a shaft having an elongated hexagonal body extending between a top end of the shaft and a bottom end of the shaft; cutting a cylindrical extension depending from said shaft bottom end; cutting an inner cap having a bottom wall; cutting a circular aperture through said inner cap bottom wall aligned with said central axis of said tubular body; cutting an outer cap having a top wall; cutting a hexagonal aperture through said outer cap top wall aligned with said central axis of said tubular body; nesting said inner cap within said tubular body upper portion; nesting said outer cap at said tubular body upper portion; positioning said inner cap bottom wall and said outer cap top wall a distance apart, wherein the ratio of the distance between said bottom wall and said top wall to said body length is a ratio of at least about 0.1; securing said inner cap and said outer cap to said tubular body by melting and welding said tab; and securing said shaft within said outer cap hexagonal aperture, and welding said cylindrical extension within said inner cap circular aperture.