Power transmission mechanism
CA 2074754 C · Owner: Chen, Chung Hsin · Inventors: Chen, Chung Hsin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A power transmission mechanism for interconverting reciprocating motion and rotational motion includes a cylinder which receives a double-head piston therein. The double-head piston has a block extending inward from an inner surface of each of two piston heads thereof defining, a space between the two blocks. A crankshaft penetrates transversely through the cylinder between the piston heads with a crank portion thereof fittingly located in the space between the two blocks.
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 28, 1992 and granted April 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 28, 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.