Internal combustion engine
CA 1104444 A · Owner: Lampard, Robert D. · Inventors: Lampard, Robert D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An internal combustion engine having a cylinder with a reciprocable piston operable to compress air on its upstroke within the cylinder. The cylinder communicates via a passage with a main combustion chamber and a subsidiary combustion chamber communicates with a chamber via a passageway. A reciprocable valve is provided operable to selectively block communication between the two chambers. Fuel is injected into the subsidiary chamber during the compression stroke of the engine, the chambers then being in communication. Before top dead centre the valve is operated to block communication between the chambers with compression continuing thereafter in the main chamber. Around top dead centre …
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
- Granted July 7, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 7, 1998.
- 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.