Coupling device for locking an excavation tooth onto an adaptor
CA 2219036 C · Owner: Quality Steel Limited · Inventors: Adamic, Dwight
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is a coupling device for locking an excavation tooth onto an adaptor. The adaptor and tooth have a passage extending therethrough. The device includes a pin and retainer. The pin is shaped in such a manner as to improve its resiliency and its ability to be disengaged from the retainer to remove the tooth from the adaptor. The retainer is inserted into the adaptor. The pin includes a retainer seat for engaging the retainer. The retainer seat has a front wall perpendicular to the longitudinal axis of the passage and a back wall which slopes away from the front wall. As the pin is inserted into the passage the retainer engages the pin until it enters the seat. The front …
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 13, 1997 and granted September 4, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 13, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2019.
- 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.