Active systems and devices including active vibration absorbers (avas)
CA 2196883 C · Owner: Lord Corporation · Inventors: Schmidt, Warren E.; Norris, Mark A.; Ivers, Douglas E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flexibly-mounted active vibration absorber (AVA) which has a secondary controllable mass M3. If the passive resonance of mass M2 of the tuned absorber is insufficient to control the input vibration a secondary mass M3 , is vibrated at a frequency amplitude and phase sufficient to make up the deficiency in mass M2. Many embodiments are described which depict variations on the first spring used for flexibly mounting the AVA the actuators used to , drive the AVA, and the attachment features for attaching to a vibrating member. Further, in another aspect, means for counterbalancing the moments produced by the AVA are described.
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 October 11, 1995 and granted December 26, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 11, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 11, 2017.
- 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.