Stud unit and skid-proof tire having the same
CA 2027563 A1 · Owner: Hojo, Hiroo · Inventors: Hojo, Hiroo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The stud unit of the present invention is used for skidproof tires of vehicles. On snow- or ice-covered road a, force works to a front end of a stud contacting the road when the vehicle applies brake or accelerates so that the, stud is kept projecting from a cylinder because the projected lines of the stud and the cylinder are mutually engaged or the projected lines of the stud engage with an engage section of the cylinder. Therefore, the front end of each stud is kept projecting from the surface of the tire. Braking action is secured by the projected studs. Note that on a dry road, the, treads of the tire hold the road without slipping so that no, force works to the stud to incline and 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
- Filed February 22, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 22, 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.