Cleaning device
CA 2001135 A1 · Owner: Maskinkonsult Bror Hult Ab · Inventors: Hult, Bror
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a blade-protecting device (13 14) for, cleaning units (1) being provided with a rotary cutter or blade (3) which is supported on a shaft (6) and which can be rotated by means of a motor (11). The shaft (6) is mounted in a body (8). The blade-protecting device (13 14), comprises a hub part (13) having a diameter being smaller than the diameter or the largest dimension of the rotatable blade (3). This hub part (13) is arranged substantially coaxially with the shaft (6) adjacent the blade (3) and is freely rotatable relatively to the body (8). A number of fix substantially, radially oriented arms (14) are rigidly attached to the hub part and extend past the periphery …
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 October 20, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 20, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 20, 2011.
- 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.