Remotely operated chimney cleaning apparatus
CA 1251605 A · Owner: Ryden, David M. · Inventors: Ryden, David M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A chimney sweeping device is disclosed. The device includes a frame which is mounted on the flue at the top of the chimney. The top section of the frame is enclosed on its three sides and top and has a pair of trap doors hingably mounted on its bottom side. The bottom section of the frame consists of four angle iron legs, at least two of which are hingably mounted to the flue so that the frame may be tipped or tilted away from the top of the flue. A chimney sweeping brush and a weight for pushing the brush down the chimney are provided and are suspended inside the frame via a central pulley mounted at the apex of the top section. Apparatus responsive to the position of the block and brush …
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 March 28, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 28, 2006.
- 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.