Plug removal apparatus
AssigneeWestinghouse Electric Corp.
InventorsWilliam F. Nanstiel, Ronald F. Antol
Life of this patent
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Abstract
The plug removal apparatus comprises a ram mounted in a rod both of which are mounted in an activating cylinder. The rod is capable of being scrwed into the plug such that when the cylinder is activated, the cylinder causes the ram to push the expander relative to the plug while the rod holds the plug thereby relieving the pressure on the plug. The activating cylinder may then be activated so as to extract the plug from the tube using short strokes. The apparatus is capable of being used manually or remotely so as to be able to remove plugs from heat exchangers and nuclear steam generators.
Claims8
Plug removal apparatus comprising:
- a fluid cylinder;
- a rod having a slot therethrough and disposed in said fluid cylinder for engaging a plug disposed in a member and extracting said plug from said member under the action of said fluid cylinder;
- a ram slidably disposed in said rod for loosening said plug in said member so that said plug can be extracted from said member;
- and
- engagement means associated with said rod and said fluid cylinder, with said slot selectively coupling said rod to said fluid cylinder, and for selectively engaging said ram thereby allowing said ram to loosen said plug when said fluid cylinder is activated.
Dependencies are inferred from the claim text.