Pump control apparatus and method
CA 1267710 C · Owner: Anastos, William N. · Inventors: Anastos, William N.; Boyd, Stephen B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed herein is an apparatus and method for controlling electrically powered liquid-moving pumps particularly bilge, and sump pumps. The apparatus is characterized by the fact that no portion thereof need be located in the hostile environment of the bilge or sump served by the pump controlled thereby. The apparatus comprises a switch (K1') inserted in the power supply circuit of the pump's prime mover (PM), an interval timer stage (1) adapted to provide an "on" signal at a preselected time interval and electrical condition, sensing means (19) inserted in the power supply circuit of the pump's prime mover and being adapted to provide an "off" signal to a sensed electrical condition of …
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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 April 10, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 2007.
- 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.