Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1988-06-03
1989-05-23
Goldberg, Howard N.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
291573R, 291573V, 29523, 29727, 295221, 138 89, B21D 5300
Patent
active
048317039
ABSTRACT:
Both an apparatus and method for plugging a conduit, such as a tube in the tubesheet of a nuclear steam generator, is disclosed herein. The plugging apparatus generally comprises an inelastically expandable plug that contains a fluid-receiving cavity, and an expansion means including both a source of pressurized hydraulic fluid and a pull-rod member having a piston for advantageously applying both a radially expansive force and a compressive force to the plug at the same time in order to inelastically expand it into sealing engagement with the inner wall of a tube. In the apparatus of the invention, the compressive force exerted on the plug by the pull-rod member not only serves to inelastically deform the plug into a radially expanded shape, but is also used to seal the open end of the plug so that the pressurized hydraulic fluid admitted within the cavity of the plug will not escape. Both the apparatus and method of the invention are particularly well suited for installing plugs in tubes surrounded by relatively inelastic structures, such as tubesheets. Additionally, the invention conveniently and reliably plugs small diameter tubes in the peripheral regions of these tubesheets.
REFERENCES:
patent: 1646431 (1921-09-01), Tomkinson
patent: 3505846 (1970-04-01), Smida
patent: 3525365 (1970-10-01), Meulendyk
patent: 3691609 (1972-09-01), Ice, Jr. et al.
patent: 4069573 (1978-01-01), Rogers, Jr. et al.
patent: 4125937 (1978-11-01), Brown et al.
patent: 4366617 (1983-01-01), Nanstiel et al.
patent: 4369662 (1983-01-01), Rieben et al.
patent: 4390042 (1983-06-01), Kucherer et al.
patent: 4393564 (1983-07-01), Martin
patent: 4393674 (1983-07-01), Rasmussen
patent: 4436117 (1984-03-01), Martin
patent: 4502308 (1985-03-01), Kelly
patent: 4502511 (1985-03-01), Zafred
patent: 4557128 (1985-12-01), Costabile
patent: 4581801 (1986-04-01), Kobuck et al.
patent: 4637436 (1987-01-01), Stewart, Jr. et al.
patent: 4660270 (1987-04-01), Ruben et al.
patent: 4672741 (1987-06-01), Zafred et al.
Calhoun Gregory L.
Cole William G.
Kolberg Kenneth D.
Wilhelm John J.
Cuda Irene
Goldberg Howard N.
Westinghouse Electric Corp.
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