Method of stress grading timber and machine for stress grading timber
CA 1135974 A · Owner: South African Inventions Development Corporation (The) · Inventors: Vinopal, George W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a method of stress grading timber and, a timber stress grading machine. The method and machine involve continuously moving a length of timber and stressing the moving length by applying a transverse load thereto. The length is supported by two supports between which the load is applied and the load causes a deflection of the timber length. The load and/or deflection are measured and the moving length is stressed differently by thereafter applying a different load to the timber length at the same position while supported in the same fashion to obtain a different deflection. The different load and/or deflection are measured and the original load and original deflection …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted November 23, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 23, 1999.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.