B - Operations – Transporting – 25 – B
Patent
B - Operations, Transporting
25
B
138/83
B25B 29/02 (2006.01)
Patent
CA 1332339
ABSTRACT OF THE DISCLOSURE 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.
613979
Campbell David
Walton John Nigel
Hedley Purvis Limited
Mccarthy Tetrault Llp
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