Closure valve for pistons of self-regulating hydraulic devices
CA 2123116 A1 · Owner: Gabas Cebollero, Carlos · Inventors: Gabas Cebollero, Carlos
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The closure valve comprises a passage body (10) consisting of a truncated portion (14) which is coupled at its extremity of smaller diameter to a cylindrical portion (15) whose free end is joined to the internal extremity of the rod (3) of the device (D) and which also consists of a closure body (12) coaxial with said rod (3) and freely sliding on said cylindrical portion (15). The axial orifice (20) of the closure body (12) has at its extremity facing the passage body (10) a closure seat (21) of progressively increasing amplitude and sized correspondingly to the closure seal (11) of the passage body (10). The configuration of the closure seat (21) and of the closure seal (11) cause the …
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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 15, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 15, 2015.
- 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.