Damper in the form of a shock absorber
CA 2024917 C · Owner: Heese, Gerhard · Inventors: Heese, Gerhard; Rink, Manfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An inexpensive damper adapted to the stress frequency in the form of a shock absorber, in particular for vehicle seats, consists of an abutment (8), in which an absorber sleeve (2) of a thermoplastic material with a piston (1) guided therein with expansion bead (10) is clamped wherein, the absorber sleeve (2) is composed of a thermoplastic material having a tensile strength .sigma.R of at least 40 MPa an, elongation at break .epsilon. R of at least 60% a tensile stress at, yield .sigma. S of at least 40 MPa and an elongation at yield .epsilon.S of at least 3.5% (according to ISO/R 527 or DIN 53 455 in each case).
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 7, 1990 and granted April 10, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 7, 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.