Power converter apparatus
CA 1194931 A · Owner: Hitachi, Ltd. · Inventors: Kurosawa, Toshiaki; Sakai, Yoshio; Kuroha, Hiroaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract:, The present invention relates to a power converter apparatus. The apparatus is comprised of an AC power supply a DC load and a controllable switching unit connected across the AC power supply and the DC load. The switching unit provides a current switching function for alternately repeating the mode of rectifying the AC power supply and supplying power to the DC load and the mode of making the current flowing to the DC load flow back. The power converter apparatus is further provided with a gate control unit for controlling the switching unit in such a manner that at the time of switching from the power supply to the flow-back mode, the power supply current and the flow-back …
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
- Granted October 8, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 8, 2002.
- 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.