Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1978-11-30
1980-08-12
Larson, Lowell A.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29727, B23P 1700
Patent
active
042165695
ABSTRACT:
A method for inserting a tube through a tubesheet aperture and expanding it into contact with the aperture's wall. A tube guide-expander device is assembled in an open end of a tube with a portion of the device protruding from the tube. The guide-expander includes a distally protruding tip portion tapered to diverge in a direction toward the tube so as to facilitate insertion of the guide-expander and engaged tube through apertures in spatially separated tube supports and tubesheet. The guide-expander and tube engaged therewith are axially displaced relative to the tubesheet until the desired relative configuration is obtained. Expansion of the tube results from expanding the assembled tube guide-expander and driving the housing tube in the radial direction against the tubesheet aperture's wall. Such guide-expander expansion obtains from relatively axially displacing two structural components and compressing an interposed, radially expansible structure.
REFERENCES:
patent: 2023738 (1935-12-01), Mason et al.
patent: 2156538 (1939-05-01), Maynes
patent: 3662451 (1972-05-01), Wagner
patent: 3824668 (1974-07-01), Wightman
patent: 4068372 (1978-01-01), Kamohara et al.
Shaffer Robert
Smith Edward H.
Stiller Richard L.
Vollmer Regis R.
Keen J. W.
Larson Lowell A.
Westinghouse Electric Corp.
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