Hydraulic spring
CA 2432340 A1 · Owner: Gedenk, Volker · Inventors: Gedenk, Volker
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The hydraulic volume (4a, 4b) of a hydraulic spring is shut off on one side by a spring element (6) that has been vulcanised into an external ring (8) and is delimited on the other side by a compensation membrane (10). The aim of the invention is to improve the impermeability between the compensation membrane (10) and the external ring (8). To achieve this the compensation membrane , (10) is clamped in a fixed manner between the external ring (8) and the cover (12). The opposing sealing surfaces (14 16) of the external ring (8) and the , cover (12) are preferably configured to be planar. The external edge (18) of the compensation membrane (10) can have a thickening (22) which fills a …
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 November 15, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 15, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 15, 2023.
- 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.