Metal working – Means to assemble or disassemble – Heat exchanger
Patent
1978-10-16
1981-04-28
Mehr, Milton S.
Metal working
Means to assemble or disassemble
Heat exchanger
29252, 29282, 279 22, 279 76, B23P 1904
Patent
active
042637139
ABSTRACT:
An apparatus for actuating a tube guide expander device inserted in a tube end and extracting it therefrom subsequent to tube expansion induced by guide-expander actuation. The apparatus includes inner and outer sleeve structures which are independently axially displaceable relative to the tube and guide-expander. The outer sleeve structure is engageable with a first compression structure of the device to secure it and its engaged tube in place during relative axial displacement of a second compression structure of the device.
Selectively coupling the inner sleeve structure to the device's second compression structure and axial displacement of both axially compresses a radial expansion element situated between the compression structures and expands the enclosing tube. A series of balls are radially displaceable from an outer unobstructing position through radial openings in the inner sleeve structure and an intermediate sleeve structure to an inner obstructing position protruding into the inner sleeve structure's bore so as to axially engage a portion of the second compression structure and prevent its extraction from the bore during axial displacement of the inner sleeve structure. Radial displacement of the balls is provided by selective axial displacement of the intermediate sleeve structure arranged about the inner sleeve structure. Simultaneous axial displacement of the inner and outer sleeve structures away from the tube with the balls in obstructing position subsequent to the tube's expansion enables extraction of the guide-expander from the tube.
REFERENCES:
patent: 2135861 (1938-11-01), Thompson
patent: 2751229 (1956-06-01), Schultz
patent: 3585701 (1971-06-01), Stary
patent: 3791011 (1974-02-01), Keys
patent: 3835520 (1974-09-01), Sismore
patent: 3854314 (1974-12-01), Martin
patent: 4068372 (1978-01-01), Kamohara et al.
Shaffer Robert
Smith Edward H.
Stiller Richard L.
Mehr Milton S.
Telfer G. H.
Westinghouse Electric Corp.
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