Rubber support
CA 2009097 C · Owner: Freudenberg, Tillman · Inventors: Freudenberg, Tillman; Freudenberg, Ulrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rubber support with hydraulic damping means for the damping of vibrations of a select frequency range includes a working chamber and a compensation chamber which chambers are connected by a connecting passage and filled with a hydraulic liquid wherein the connecting passage is constructed as a channel and dimensioned in such a way that a resonance movement of the enclosed volume of liquid results from the transmission of vibrations within the range of frequencies to be dampened and that the connecting passages is restricted by a throttle opening of limited axial extent. A highly effective damping action is achieved over a relatively large range of frequencies with such a rubber support.
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 February 1, 1990 and granted May 31, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 1, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 1, 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.