Method and apparatus for isolating well pump units
CA 1233366 A · Owner: Schmidt, Donald M. · Inventors: Schmidt, Ernest A.; Schmidt, Donald M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed in a well pump unit wherein the well is provided with a polish rod and the pump unit includes a draw cable adapted to reciprocate the polish rod, a method for increasing the life of bearings gears, and the like by eliminating electrical pitting in the pump unit. comprising the steps of providing a carrier bar operative to interconnect the draw cable and the polish rod wherein the carrier bar is split into first and second bar segments having complementary and opposed cable bores adapted to receive the draw cable and having complimentary and opposed rod bores adapted to receive the polish rod electrically isolating the polish, rod from the draw cable by positioning …
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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 March 1, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 1, 2005.
- 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.