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US Forest Service Research & Development
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  • US Forest Service Research & Development
  • 1400 Independence Ave., SW
  • Washington, D.C. 20250-0003
  • 800-832-1355
You are here: Home / Publications & Products / Patents / Patented Technologies / Wood Connectors / Improved Joint for Connecting Wood Members

Improved Joint for Connecting Wood Members

Improved Joint For Wood Memebers

Patent Status

Patent Number: 6,551,007

Date Issued: April 22, 2003

Technology Description

When end-joining two segments of timber to produce a finished wood product, it is desireable to produce joints with sufficient strength and desirable aesthetic characteristics. Conventional end joints for timber include a plurality of finger joints which are relatively effective for wood segments having a square or rectangular cross section, but have reduced effectiveness for wood segments having a round cross section. What is therefore needed is a joint for connecting two timber segments having a round cross section that has improved strength characteristics, and that produces an aesthetically appealing joint.

This invention is a means of joining timber with a round cross-section. By utilizing fingers that are cut concentric with the round wooden members being joined, rather than using conventional, straight-cut fingers, this invention overcomes the limitations of the conventional finger joint. The concentric finger joint has improved strength, particularly at the outer portions of the joint where the stresses are greatest. Further, the concentric joint provides a more aesthetically pleasing joint, with less joint seam exposed. Finally, the increased reliability of the concentric joint allows the utilization and joining of smaller diameter timber, making previously unusable timber available.

Potential Commercial Uses

This technology offers a method of joining wood in which the joint is more aesthetically pleasing, has improved strength, and may also be used with smaller diameter timber.

Licensees and/or industrial cooperators are being sought for this technology.

Inventor/Project Leader

Robert J. Ross