Device for repairing pipe joints
CA 2111876 C · Owner: Consumers' Gas Company Ltd. (The) · Inventors: Wiercienski, Jacek; Kuzan, Pawel; Goldenberg, Andrew A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for repairing cast iron pipe joints comprises a head having a motor for actuating a tool and a body, the head being pivotally connected to the body so that it can be pivoted from an axial position to a radial position within the pipe. In a preferred embodiment the, head includes a motor driving a drill bit. A retractable foot is extended to force the head against the pipe wall to be pierced by the drill bit, following which sealant is injected into a hollow drill shaft and flows up the helical grooves of the drill bit into the pipe joint cavity. Preferably a pair of guide wings maintains the device centred in the pipe and raised off of the pipe floor, and the operator monitors …
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 December 20, 1993 and granted September 9, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 20, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2015.
- 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.