Belt tension adjusting device
CA 2074637 C · Owner: Ntn Corporation · Inventors: Izutsu, Tomoyoshi; Hori, Isao; Kawashima, Kazuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A belt tension adjusting device having a pulley arm having a bore formed with threads, a fixed member and a support shaft extending upwardly from the fixed member into the bore in the pulley arm. A bolt made of a synthetic resin is axially movably mounted on the support shaft and held in thread engagement with the threads formed on the bore. An elastic member is mounted in the bore between the bolt and the support shaft or a member integrally mounted on the support shaft for biasing the bolt in an axial direction. A coil spring is mounted on the pulley arm and having one end thereof in engagement with the pulley arm and the other end with the fixed member.
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 July 24, 1992 and granted November 10, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 2014.
- 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.