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:
Dec. 09, 1986
Filed:
Oct. 03, 1985
Applicant:
Inventor:
Friend K Bechtel, Moscow, ID (US);
Assignee:
Metriguard, Inc., Pullman, WA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
73831 ; 73826 ; 73859 ;
Abstract
A lumber testing apparatus incorporates opposed wedges to simultaneously exert tension and clamp forces on boards being tested. The inclined wedge surfaces utilize bearing materials and wedge angles selected to match the required clamp forces to tension forces on each board, without crushing the boards at high loads. This is accomplished by using bearing materials having a variable coefficient of friction under varying load conditions.