Pipes and tubular conduits – With closures and plugs – Inflation stem type
Patent
1987-12-24
1989-04-25
Bryant, III, James E.
Pipes and tubular conduits
With closures and plugs
Inflation stem type
165 71, 376204, F16L 5512
Patent
active
048238465
ABSTRACT:
Apparatus for restraining the tip of a tube plug from traveling in a tubular member when the tip is fracturedly separated from the plug during the process of extracting the plug from the tubular member. The tube plug includes a shell defining an open cavity therein inwardly tapered from the tip of the plug. Slidably captured in the cavity is a shell expander which has a first bore therein, for expanding the shell into sealing engagement with the tubular member. The apparatus comprises an expansible restrainer, which is disposed in the first bore, for radially expanding the expander into engagement with the shell by radially expansibly engaging the first bore when axially compressed in the first bore. When the restrainer radially expansibly engages the first bore, the expander expansibly engages the shell for restraining the tip of the shell when the tip is fracturedly separated from the shell so that the tip does not travel in the tube and become lodged in or damage the tube.
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Co-pending patent application, Ser. No. 026,363 (W. E. Case 52,960), filing date Mar. 16, 1987, in the name of James W. Everett, entitled "Double Gimbal Camlock Installation Assembly", assigned to the Westinghouse Electric Corporation.
Co-pending Westinghouse Application Ser. No. 050,799 (W. E. Case 53,565) filed May 18, 1987 in the name of James W. Everett et al., entitled "Improved System and Method for Removing A Plug from A Heat Exchanger Tube", assigned to the Westinghouse Electric Corporation.
Co-pending Westinghouse Application Ser. No. 868,225 (W. E. Case 53,217) filed May 28, 1986 in the name of Keating et al. and entitled "Multi-Seal Mechanical Plug", assigned to the Westinghouse Electric Corporation.
Co-pending Westinghouse Application Ser. No. 868,226 (W. E. Case 53,176) filed May 28, 1986 in the name of Susanta Sinha et al. and entitled "Duplex Mechanical Tube Plug", assigned to the Westinghouse Electric Corporation.
Co-pending Westinghouse Application Ser. No. 936,558 (W. E. Case 53,457) filed Dec. 1, 1986, in the name of John J. Wilhelm, entitled "Plugging Apparatus and Method Using A Hydraulically Assisted Plug Expander", assigned to the Westinghouse Electric Corporation.
Co-pending Westinghouse Application Ser. No. 936,559 (W. E. Case 53,583) filed Dec. 1, 1986 in the name of John J. Wilhelm et al. entitled "Apparatus and Method for Plugging A Tube", assigned to the Westinghouse Electric Corporation.
Everett James W.
Sadofsky Frank
Bryant III James E.
Stevens Walter S.
Westinghouse Electric Corp.
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