Pneumatic actuator having an end mounted control device
CA 2200248 C · Owner: Worcester Controls Corporation · Inventors: Nelson, David C.; Marchesseault, Richard R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention features a device for controlling the operation of a pneumatic actuator and a pneumatic actuator having such a control device. More particularly, the, actuator control device of the instant invention includes a housing mounted to an, actuator end cap, a solenoid valve disposed within the housing and a gas control valve, that controls the pressurized gas admitted to and exhausted from the actuator for valve, actuation. The gas control valve is responsive to the solenoid valve and is mounted to, the housing. Preferably, the control device includes a position indication mechanism, disposed within the housing that determines a prespecified position of the valve, responsive …
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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 March 18, 1997 and granted January 2, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 18, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 18, 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.