Improvements in or relating to reciprocating piston engines
CA 2494749 A1 · Owner: Branston, Julian George Daniel · Inventors: Branston, Julian George Daniel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A reciprocating piston engine is described. The engine has a cylinder with a transfer port (22) and an exhaust port (24) whereby the transfer port (22) , and the exhaust port (24) are at least partially coincident and are provided with a port valve (26). The engine further comprises a pump (32) having a divided chamber (38) therein, one side of the chamber being connected to a crankcase (30) via a connecting port (34) and the other side of said chamber , having an inlet port (40) an outlet port (41) and a valve means (42 44) to , ensure unidirectional flow therethrough wherein said chamber is divided by a , moving member (36) responsive to variations in pressure in said crankcase (30) …
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 30, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 30, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 2025.
- 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.