Roller chain sprocket with symmetric cushion rings
CA 2478679 A1 · Owner: Young, James D. · Inventors: Young, James D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sprocket (212) includes a hub and a plurality of teeth projecting radially outwardly from the hub. At least one cushion ring (244) is located adjacent the teeth, and the cushion ring defines a plurality of compression pads (402) separated from each other by transverse grooves (404). Each of the compression pads is defined symmetrically about a circumferential mid-point. When part of a sprocket with symmetric tooth spaces the cushion ring is being operable , identically in first and second opposite rotational directions. In one arrangement, the compression pads each include a planar outer surface having a leading and a trailing end, wherein the leading end and trailing end are …
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 April 15, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 15, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 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.