Circular saw blade
CA 1136519 A · Owner: Ahlstrom (A.) Osakeyhtio · Inventors: Tuomaala, Jorma A.K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A series of apertures are formed in a blade of a circular saw which define a plurality of the strips interconnecting the toothed annular peripheral portion and the inside portion of the blade. The strips are dimensioned so as not to hinder the expansion of the peripheral portion and the width of the peripheral portion is so great that its own weight can bring about the required tension due to the centrifugal force when the blade rotates. The width of the peripheral portion is 10-30% of the diameter of the blade and the length of the flexible part of the strips is at least 10% of the diameter of the blade. The flexibility, defined by the formula in which L - the …
Read the whole patent
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 30, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 30, 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.