Pipeline lifting device
CA 1098563 A · Owner: Vsesojuzny Nauchno-Issledovatelsky Institut Po Sboru, Podgotovke I Trans Portu Nefti I Nefteproduktov "Vniisptneft" · Inventors: Raschepkin, Konstantin E.; Galjuk, Vasily K.; Buzhinsky, Vladimir L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The device comprises a detachable sling consisting of an upper part and a lower part. The upper part carries a self-propelled trolley. The lower part of the sling is articulated by links with supporting shoes also articulated to each other by links. The shoes are arranged symmetrically with relation to the longitudinal axis of the pipeline and are moved by hydraulic cylinders, both ends of each cylinder connecting the lower part of the sling with one of the shoes by means of ball joints. Both parts of the sling are interconnected with each other by projections and slots installed respectively, on the upper and lower parts of the sling.
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 31, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 1998.
- 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.