The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 27, 2006
Filed:
Oct. 17, 2003
Gerald A. Ziegler, Orting, WA (US);
Michael J. Yancey, Puyallup, WA (US);
Gerald A. Ziegler, Orting, WA (US);
Michael J. Yancey, Puyallup, WA (US);
eyerhaeuser Company, Federal Way, WA (US);
Abstract
Generally described, a bending stiffness predicting systemincludes a density measurement sub-systemand a sound wave velocity measurement sub-system. From the measurements of both density and speed of sound through the wood product received from the sub-systemsand, respectively, the bending stiffness (Y) may be predicted by calculating the bending stiffness (Y) according to the bending stiffness (MOE) equation: Y=kρV/; wherein k is the calibration constant, ρ is the density or specific gravity of the member, V is the velocity of a sound through the member and g is the acceleration due to gravity. The calculation of wood product bending stiffness may be carried out manually, or may be calculated using a calculating sub-systemfrom the two measured values, density and velocity, according to Equation 1 above.