Rotary piston engine
CA 1331741 C · Owner: Yang, Ki Wah · Inventors: Yang, Ki Wah
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rotary piston engine comprising two segregated body chambers of compression and expansion and one separable combustion chamber, carring out air suction and compression, combustion resultant expansion and exhaust and fuel injection and constant-volume combustion process without any value respectively: the compression and the expansion chamber both are arranged parallel adjacent to each other, each are formed by two partially overlapped body-bores provided respectively with cylindrical hubs at respective centers thereof, each have a pair of screwed rotors rotatably mounted on said respective hubs and both, communicate to each other by the combustion chamber and gas passageway means; it is …
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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
- Granted August 30, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 30, 2011.
- 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.