Three-way piezoelectric valve
CA 2125017 C · Owner: Landis & Gyr Powers, Inc. · Inventors: Caliendo, Guy P.; Hanley, Mark G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A three-way valve having a valve body with an internal output chamber. A supply means is in fluid communication with the output chamber for providing a source of fluid to pressurize the output chamber and thereby obtain a desired device output signal. An exhaust means in fluid communication with the output chamber provides a passage for the fluid to vent from the output chamber out to atmosphere. An output means also in fluid, communication with the output chamber is included for, directing the device output signal from the output chamber to a pneumatic device. A single bending element selectively actuates the supply means or the exhaust means to obtain a predetermined pressure value to be …
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 June 2, 1994 and granted August 10, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 2, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 2, 2016.
- 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.