Hydraulic bolt tensioner
CA 1332339 C · Owner: Walton, John Nigel · Inventors: Walton, John Nigel; Campbell, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydraulic bolt tensioner for tensioning a threaded bolt extending from a fixed component comprises a cylinder adapted to react against the component a piston slidably, mounted in the cylinder and having an axial bore therein through which the bolt extends, the piston reacting against a reaction member threaded on the bolt and a source of, hydraulic fluid. Defined within the cylinder are a first chamber the supply of fluid under pressure to which effects powered extension of the piston within the cylinder and a, second chamber the supply of fluid under pressure to which effects powered retraction of the piston within the cylinder.
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 October 11, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 11, 2011.
- 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.