Liquid forced-feed apparatus
CA 2187408 C · Owner: Yumoto, Hideaki · Inventors: Yumoto, Hideaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid forced-feed apparatus, such as a steam trap or pump-trap combination, simplified in construction by decreasing the number of component parts and capable of, switching a change-over valve smoothly with reduced buoyancy. A float, a change-over valve and a snap mechanism are built in a hermetic vessel. The snap mechanism includes a float arm which rotates around a first shaft, a sub-arm which rotates around a second shaft a, spring bracket section formed on the float arm a spring, bracket section formed on the sub-arm and a reversible, plate spring disposed between the spring bracket sections. The float is connected to the float arm and the, change-over valve is connected to the …
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 October 8, 1996 and granted February 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 8, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 2018.
- 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.