Concentric finger jointed timber

Title
Concentric finger jointed timber

Author
Flach, D. , Hernandez, R.

United States Department of Agriculture patents 2003 no. US 6,537,625 B2

Abstract

A finger joint for connecting first and second wooden segments includes intermeshing fingers that are concentrically disposed about the center of the end face of the two wooden segments. The fingers may either be independent round protrusions forming recesses therebetween operable to receive the fingers of a corresponding wooden segment to be joined, or may alternatively comprise a spiral shaped protrusion defining a corresponding recess sized to receive the spiral shaped protrusion of the corresponding wooden segment to be joined.

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