Tire tread grooving apparatus and method
CA 2024957 A1 · Owner: The Goodyear Tire & Rubber Company · Inventors: Smith, John William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cutting head assembly (28) is diametrically opposed to a foot assembly (30) which is capable of gripping a portion of the tire. A fluid cylinder (32) is attached at one end to the foot assembly (30) and has a movable shaft extending from the other end. The shaft is connected to the cutting head assembly (28) for moving it between a first and second portion with respect to the foot assembly (30). The cutting head assembly (28) has a cutting blade (38) attached thereto. The cutting blade (38) is substantially "U" shaped having each free end attached to a conductive material, such as blocks of brass. The conductive material is then attached to an electrical power source (24) to provide …
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
- Filed September 10, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 2012.
- 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.