Piston oil control ring
CA 1057327 A · Owner: Sealed Power Corporation · Inventors: Carlson, Edward G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, In a composite oil control ring for reciprocating piston internal combustion engines of the type, which includes a relatively soft parted cast iron ring and an expander-spring disposed internally of the ring to bias the same into sealing engagement with a cylinder wall, a parted annular insert rail of wear-resistant metal is disposed between the expander and the ring to reduce wear on the ring and to prevent embedment or unitization of the ring and spring. --------0-------
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 June 26, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 26, 1996.
- 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.