Soil pipe coupling
CA 1339344 E · Owner: Cremco Couplings, A Joint Venture · Inventors: Doyle, Bernard Patrick; Cankovic, Mitchell Mark; Cronk, Helen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An unshielded soil pipe. There is an annular portion formed from an elastomer that produce a hardness of about 95 on the Shore Durometer A Scale. Clamps attach to clamping sleeves made with the same material as the annular portion. The clamping sleeves are formed integrally with the annular portion. The clamping sleeves extend axially from either side of the annular portion to overlap a length of each pipe to be joined. Each of the clamping sleeves is formed with an annular groove to receive the clamping means. There is at least one outwardly projecting continuous circumferential ridge formed in the annular groove to separate the clamping means from the clamping sleeve and to stiffen the …
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 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 21, 2009.
- 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.