Disk for filament trimmer
CA 1069705 A · Owner: Black And Decker Inc. · Inventors: Pittinger, Charles B. (Jr.)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disk-shaped filament holder and dispenser for a filament trimmer; the disk has a central attachment for a power drive and a plurality of circumferentially spaced holes through which a filament having one end secured to the disk is threaded; the free end of the filament during operation swings radially from the disk as the cutting filament, or filament trimmer; abrasive contour of the holes insures that the free end of the filament will fail first at the last hole through which threaded rather than at some portion of the free length; on such failure centrifugal force pulls the stub end free from the hole at which failure occurred and swings it out radially from the disk at the next prior …
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 January 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 1997.
- 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.