Submersibly driven reciprocating pump
CA 2286502 A1 · Owner: Olson, David L. · Inventors: Tetzlaff, Steven K.; Dillon, David B.; Olson, David L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A well pump assembly includes a motor that has a rotating drive shaft. The motor, is secured to the lower end of a string of tubing A reversing linear actuator , is carried inside the string of tubing. The linear actuator has a first member that is rotated by the drive shaft, and a second member that does not rotate rather moves linearly in response to , rotation of the fast member. One of the members is a tracked rod and the other member is a driver cage, carried by the tracked rod. A lower connector is also carried in the string of conduit. The, lower connector has a coupling on its lower end that stabs into engagement with a coupling, on the upper end of the motor drive shaft. A …
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 October 14, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 14, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 14, 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.