Coaxial valve-type alternating pump especially for boats such as a rubber dinghy, manually operated or motor-driven
CA 2271827 A1 · Owner: Siviero, Roberto · Inventors: Siviero, Roberto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pump (10) of plastic material especially for a rubber dinghy and the like comprising a cylinder (11) with a double-acting alternating piston (13) and a small oblong cylinder (15) alongside the first closed by heads (24) with , packings (26) that also act as valves made with a central annular area containing holes (18, 30) completely covered by an elastic discoid diaphragm (21, 31), the valves (31) of the cylinder (11) communicating with the environment and the valves (19) of the small cylinder communicating with chambers (60, 61) that form at the ends of the cylinder (11) so that operating the piston (13) by means of an overgear with crank an electric , motor or the propulsor of 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 January 20, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 20, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 20, 2019.
- 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.