Rotary air pumping apparatus with radial seal assemblies on piston
CA 1293229 C · Owner: Hansen, Craig N. · Inventors: Hansen, Craig N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An air pump and compressor having a housing (21) with a cylindrical internal chamber (40). A plurality of pairs of intake and exhaust valves (77 88) mounted on the, housing control the flow of air into and out of the chamber. A piston (37) located within the chamber is mounted on a shaft (42) rotated on the housing. The shaft (42) has a primary eccentric (46) that supports the piston in the chamber. A pair of secondary eccentrics (104 106) spaced, from the primary eccentric are mounted on the piston and housing to control the orbital movement of the piston. Seal assemblies (129, 200) slidably mounted in slots (133 200), in the piston engage the inner cylindrical wall (26) of the housing to …
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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
- Granted December 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 17, 2008.
- 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.