Patent ID: 6637111
Filing Date: 2003-10-28
Classification: E02F,Y10T

Abstract:
A method for making a boom for a bucket type excavator comprising the steps of:bending a rear member from a first steel plate into a first triangular cross section with arcuate corners; disposing a base of said first triangular cross section at a lower portion of said rear member; disposing an apex of said first triangular cross section at an upper portion of said rear member; bending a front member from a second steel plate into a second triangular cross section with arcuate corners; disposing a base of said second triangular cross section at a lower portion of said front member; disposing an apex of said second triangular cross section at an upper portion of said front member; providing a boom intermediate member comprising a first means and a second means; affixing an outer end of said rear member to said first means; affixing an inner end of said front member to said second means; and shaping said boom intermediate member to incline said front member with respect to said rear member so that said front member, said rear member and said boom intermediate member assume a generally boomerang shape.