Gas and air engine
CA 2308129 A1 · Owner: Zembrzuski, Leonard · Inventors: Zembrzuski, Leonard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An engine for operation on compressed air or a combination of gas and air is described The engine comprises a cylinder block having a plurality of individual cylinders each of the cylinders containing a piston. The piston divides the cylinder into an upper and lower chamber each, of the upper and lower chambers being provided with an intake and an exhaust valve. The piston is connected to one end of a piston rod extending outward of the lower end of the cylinder, the second end of the piston rod being provided with rollers riding within an track having an upper and lower surface attached to a drive mechanism. The track has the shape of the circumference of slightly offset overlapping …
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 12, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 12, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 12, 2022.
- 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.