Free piston compressor
CA 2044632 A1 · Owner: Muller, Wilhelm · Inventors: Muller, Wilhelm
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A free piston compressor comprising in combination of a compressor cylinder and free piston connected with each other and arranged in said cylinder or cylinders for free reciprocation the, piston formed with two compression surfaces the surface on one or, the other side of the piston being acted upon by the discharge pressure of one or the other compression side of said compressor and being controlled by regulating devices in the discharge conduit between compression chamber exhaust and intake to the groove area of the piston mass of said engine, which piston mass moves in clock and counterclock, rotary propelled, forward and reverse stoke operation.
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 12, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 2013.
- 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.