Shock sub for absorbing torsional impact loads
CA 2402035 A1 · Owner: Wawrzynowski, Michael · Inventors: Wawrzynowski, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A shock sub for absorbing torsional impact loads includes a tubular housing having an interior surface and an inner mandrel telescopically received within the tubular housing. The inner mandrel has an outer surface. A spiral engagement is provided between the inner surface of the housing and the outer surface of the mandrel allowing unfetterd relative rotational movement of the housing and the mandrel along a spiral guide path defined by the spiral engagement. Springs are provided for dampening relative rotation of the housing and the mandrel such that torsional, impact loads result in relative rotational movement of the housing and the mandrel along the spiral guide path with the, relative …
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 September 9, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 9, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 9, 2024.
- 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.