Electric hoist
CA 2007569 C · Owner: Tzanev, Nikolay Todorov · Inventors: Pavlov, Pavlin Stoyanov; Tzanev, Nikolay Todorov; Nikolov, Nikolay Nachev
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The electric hoist comprises a drum, seated in a carrying frame, and an electric motor, mounted in the face of the carrying frame, and connected kinematically to a planetary reduction gear, the housing of which is disposed totally inside the drum. The housing is connected to the drum by means of a gear diaphragm and a gear ring. The carrying frame is connected by means of a connecting shaft and spline joints to the output shaft of a stem and the, gear ring is shaped as an integral part of the drum.
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 January 11, 1990 and granted April 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 11, 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.