Rocker arm with rounded channel to engage a valve stem with semi-spherical end
CA 2037870 C · Owner: Mills, Jesse V. · Inventors: Mills, Jesse V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cold-formed rocker arm 10 of the cam-follower type is specifically designed for variable-lift engines. The rocker arm 10 comprises a one-piece metal body 32 preferably of generally inverted U-shaped cross section throughout most of its length. The body 32 has a top wall 34 and two side walls 36, 38 extending downwardly therefrom and carrying an axle 58 an which a cam-contacting roller 24 is rotatably mounted and exposed through a central opening 52 in the top wall 34 above the roller 24 to be engaged by a tapered cam 26 of a cam shaft. The rocker arm 10 has a substantially semi-spherical recess 40 at one end 12 to receive an end of a lifter post 14 on which the rocker arm 10 can pivot. …
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 March 8, 1991 and granted January 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 8, 2013.
- 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.