Eccentric worm pump
CA 2264361 A1 · Owner: Fenton, Gordon L. · Inventors: Fenton, Gordon L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An eccentric worm pump has a tubular stator extending along a main axis and having an intake side and an output side an eccentric worm fitting in the stator and centered on a rotor axis offset from the main axis, an intake housing forming an intake compartment opening into the intake side a connecting, shaft extending along the main axis from the rotor through the intake compartment, and a drive shaft extending along the main axis from the connecting shaft out of the intake compartment. The rotor connecting shaft, and drive shaft are unitarily formed of plastic. A seal housing mounted on the intake housing seals around the drive shaft. A drive connected to the drive shaft rotates the drive …
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 March 23, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 23, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 2021.
- 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.