Vacuum cleaner having automatic filter cleaner
CA 1053862 A · Owner: Hitachi, Ltd. · Inventors: Sagawa, Kouiti; Yokoyama, Syozi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vacuum cleaner including a filter having a fine mesh and received in a dust case, and a cord reel received in a case for automatically winding a cord by the force of a coil spring. In this vacuum cleaner a dust removing mechanism is automatically driven by utilizing the turning force of the cord reel generated by rolling up and drawing the cord to remove the dust clinging to the aforesaid filter therefrom.
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 May 8, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 8, 1996.
- 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.