Hydraulic system for a power tong
CA 2611644 C · Owner: Vatne, Per A. · Inventors: Vatne, Per A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydraulic system for activating the at least one clamping die (14) of a power tong (1), the power tong (1) including two housing halves (2), pivotable relative to each other the , housing halves (2) being arranged to be pivoted between a closed, active position and an open, inactive position and a , radially divided drive ring (6,8) which is provided with the at least one hydraulically activated clamping die (14) directed towards the centre axis (10) of the power tong (1) being placed in the housing halves (2) the drive ring (6,8) , being supported and connected to at least one driving motor (12) for the rotation of the drive ring (6,8) about the centre axis (10), and a hydraulic …
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 June 2, 2006 and granted February 21, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 2, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.