Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1987-03-10
1989-01-24
Echols, P. W.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29253, 29280, B23P 1904
Patent
active
047993057
ABSTRACT:
A tube protection device is positioned within a heat exchange tube of a nuclear steam generator to span a defect region and protect same against damage or deformation during withdrawal of the tube from the generator for subsequent defect analysis and testing. The tube protection device includes gripper means at the opposite ends thereof which are expansible from a relaxed condition permitting movement of the device through the tube to a clamped condition, releasably, frictionally engaging the contiguous interior sidewall surfaces of the tube at positions respectively spaced from the defect and spanning the defect region. An installation tool includes an elongaged linkage mechanism insertable through an open end of the tube for positioning the tube protection device and for operating same from the accessible portion of the linkage mechanism exterior to the open end of the tube between said relaxed and clamped conditions, and for remote withdrawal of the tube protection device from the tube.
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Brunner Michael G.
Calhoun Gregory L.
Echols P. W.
Gorski Joseph M.
Westinghouse Electric Corp.
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