A pneumatic actuator device
CA 2204077 A1 · Owner: Chauffeteau, Eric · Inventors: Chauffeteau, Eric; Chene, Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pneumatic actuator device comprises a first piston (18) movable in a first axial chamber (12) situated at the rear end thereof, a piston (20) movable in a second axial chamber (14) situated in front of said the first a, separation wall (28) between the two axial chambers through which there slides a hollow rod (24) inter-connecting the pistons (18, 20), and an advance member (40) connected to the pistons and situated at the front of the actuator body (10). Pressurized fluid feed means include a slide valve. The separation wall (28) has a transverse bore (72) in which the slide of the valve is received, a first duct (74, 76) which connects the transverse bore (72) to a pressurized fluid …
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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 April 30, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 30, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 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.