Method of estimating timber stiffness profiles
Patent 6889551 Issued on May 10, 2005. Estimated Expiration Date: 
April 12, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 12, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesLumber optimizer Apparatus and method for testing wooden poles Method for estimating the strength of wood Method and apparatus for improved inspection and classification of attributes of a workpiece Patent #: 6272437 InventorsAssigneeApplicationNo. 10257466 filed on 04/12/2001US Classes:73/597, Velocity or propagation time measurement73/602, With signal analyzing or mathematical processing700/35, Bidirectional (e.g., oscillatory)700/84KeyboardExaminersPrimary: Williams, HezronAssistant: Miller, Rose M. Attorney, Agent or FirmForeign Patent References
International ClassesG01N033/46G01N003/30 B07C005/34 G01N029/04 G01N003/30 G01N023/203 AbstractThe invention relates to methods and apparatus for estimating stiffness or elasticity profiles across timber. This involves measuring a velocity of a plane compression wave propagating in the timber, determining density information relating to the timber and estimating an initial elasticity profile. A reiterative process is then conducted whereby a revised elasticity profile is determined using the density information and initial elasticity profile. The revised elasticity profile is then used to determine how the timber is utilised.Field of SearchVelocity or propagation time measurementHaving plural, diverse forms of radiant energy With signal analyzing or mathematical processing Having separate sonic transmitter and receiver By reflected wave Having plural sonic type transmitters or receivers tranducers MOISTURE CONTENT OR ABSORPTION CHARACTERISTIC OF MATERIAL By heat conductivity SHEET, WOVEN FABRIC OR FIBER Filament MISCELLANEOUS Acoustic emission Flaw or defect detection Quality evaluation Statistical measurement Histogram distribution Probability determination Quality control | |
