Attachment device for an auxiliary wheel releasably attachable to a wheel of a vehicle
CA 2449645 C · Owner: Schaad, Fritz Johann · Inventors: Schaad, Rudolf; Schaad, Fritz Johann
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
For fastening an auxiliary wheel to the wheel of a vehicle bolts are fixed to the auxiliary wheel which bolts are aligned substantially parallel to the wheel axle of the auxiliary wheel. Each of the bolts has a head-shaped swelling which can be inserted into slot-shaped recesses provided on the wheel of the vehicle and can be pushed into the slot-shaped recesses. The head-shaped swelling of the bolts is hereby held in the slot-shaped recesses. The auxiliary wheel is locked in this position through locking means. A simple mounting and dismounting of an auxiliary wheel to the wheel of a vehicle is thereby obtained.
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 November 18, 2003 and granted July 5, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 18, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 2025.
- 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.