Controllable vibration apparatus
CA 2259516 A1 · Owner: St. Clair, Kenneth A. · Inventors: Chrzan, Michael J.; Prindle, Donald R.; St. Clair, Kenneth A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A controllable vibration apparatus such as a linear fluid damper in which an electrical connection to a controllable valve preferably located in the , piston assembly is made through a single-strand electrical conductor. In one embodiment, the piston and piston rod (24a) are preferably used as the source of low potential (ground or retun electrical path). An accumulator assembly (44a) preferably including a flexible diaphragm (76a) thereon can be used to provide separation of the fluid-containing chambers from a pressurized accumulator chamber. In magnetorheological (MR) fluid dampers a special , sealing system including a defined relationship between surface finish on the piston rod …
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 June 5, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 2019.
- 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.