Wireless pump jack dynamometer
CA 2309523 A1 · Owner: Gunthorpe, Gary E. · Inventors: James, Donald E.; Vyskocil, Thomas A.; Gunthorpe, Gary E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sucker rod pump dynamometer has a movable signal device secured to and movable with the polish rod and which transmits a first signal and, receives wireless signals. A fixed signal source receives the first signal and returns a wireless return signal. A controller directs the movable signal device to, send the first signal and measures the elapsed time between its transmission and the receipt of the wireless return signal be it a reflection of the first , signal or an independent signal emitted by the fixed signal source. Preferably the , first, signal is an infrared signal which instantaneously triggers the second signal device to return an ultrasound return signal; the reverse also …
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 May 26, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 26, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 26, 2022.
- 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.