Hand operated chain block having an improved cover
CA 2236729 C · Owner: Elephant Chain Block Co. Ltd. · Inventors: Kobayasi, Eikiti; Okamoto, Yosiaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To provide a hand operated chain block capable of facilitating the fitting of the brake cover to the related side plate without worsening the appearance of the chain block a brake cover is provided, at a marginal portion therearound with a flange portion extending outwardly in the same direction as one side plate to abut with the one side plate and the flange portion is provided, at a marginal portion therearound with recesses fittable to the stay bolts. The recesses are brought into engagement with the related stay bolts by fitting the recesses to the related stay bolts thus enabling the brake cover to be easily fixed in place and also be prevented from being disengaged from the one side …
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 May 5, 1998 and granted March 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 5, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 5, 2020.
- 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.