Hydraulic bolt tensioner
AssigneeJohn K. Junkers
InventorJohn K. Junkers
Life of this patent
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Abstract
A hydraulic bolt tensioner having a first chamber and a second chamber, a first hollow piston movable in the first chamber and partially extending into the second chamber, a second piston displaceable inside the first piston and movable in the second chamber, the second piston having connecting means for connecting with an end of a bolt, and a hydraulic fluid supply into the first chamber so that when hydraulic fluid pressure is applied to the first chamber, the first piston moves so that the first piston displaces the hydraulic fluid in the second chamber and moves the second piston to pull the end of the bolt.
Claims6
A hydraulic bolt tensioner, comprising means forming a first chamber and a second chamber;
- first hollow piston means movable in said first chamber and partially extending into said second chamber;
- second piston means displaceable inside said first piston means and movable in said second chamber, said second piston means having connecting means for connecting with an end of a bolt;
- and means for supplying hydraulic fluid into said first chamber so that when hydraulic fluid pressure is applied to said first chamber, said first piston means moves so that said first piston means displaces the hydraulic fluid in said second chamber and moves said second piston to pull the end of the bolt.
Dependencies are inferred from the claim text.