A device with coaxial, opposite, modular pistons with double eccentric cams or similar, for floated pumps
CA 2201987 C · Owner: Cefis, Giovanni · Inventors: Cefis, Giovanni
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for floated pumps with coaxial opposite, modular pistons (7), operated by double eccentric cams (5) comprises pumping groups operating in parallel onto one and the same working chamber communicating with safety valves - one for suction and one for sending - and they may be aligned, kept together by tie-rods in higher or lower number, thus allowing differentiated flows and consequently differentiated powers. Said pistons (7) have a large diameter and a short run, and their sealing is determined by elastomeric flexible membranes (8) resting on bevellings which assure the functioning thereof, even under high pressures. Also said valves (17 20) of the pump are formed with, elastomeric …
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 April 7, 1997 and granted December 12, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 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.