Rotary shock absorber with a controlled damping rate
CA 2014477 C · Owner: Shtarkman, Emil Meyer · Inventors: Shtarkman, Emil Meyer
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rotary shock absorber for damping relative movement between parts includes a housing connectable two one of the parts and a shaft having its axially opposite ends connectable with another one of the parts. The housing defines at least one chamber for a field-responsive fluid. The shaft is supported for rotation about its longitudinal central axis relative to the housing. A rotor blade is disposed in the chamber and is connected with the sheet and extends radially of the shaft. The rotor blade is angularly movable in the chamber. A number of energizeable electromagnetic coils is provided for, when energized applying an energy field to the fluid in the chamber. The shear resistance of the …
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 12, 1990 and granted April 5, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 2012.
- 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.