Pipe joints or couplings – With assembly means or feature – Molded joint facilitator
Patent
1977-12-07
1979-01-23
Arola, Dave W.
Pipe joints or couplings
With assembly means or feature
Molded joint facilitator
285157, 285287, F16L 1308
Patent
active
041357400
ABSTRACT:
This invention relates to apparatus for facilitating the construction of a heat exchanger, such as a condenser or evaporator employed in an air conditioning system, wherein exchanger tubes extending through a plate fin assembly are joined together by means of return bend connections or the like. The ends of the tube are provided with an oval shaped bell in which are telescoped the return bends. Diametrically opposed nibs are formed on the outer surface of the return bend connectors near the distal end thereof. The outside diameter over the nibs is slightly larger than the minor inside diameter of the oval bell. The nibs are inserted into the bell aligned along the minor diameter of the opening. The nibs are thus caused to ride in engagement against the wall of the bell to frictionally support the connector in assembly. The joint is then immersed in a molten solder bath whereby solder flows freely into the joint region along the major axis to create a highly reliable joint.
REFERENCES:
patent: 996023 (1911-06-01), McAdoo
patent: 2397382 (1946-03-01), Smith
patent: 2949692 (1960-08-01), Kuhn
patent: 3833986 (1974-09-01), DeCicco
patent: 3957289 (1976-05-01), Kilgore
Arola Dave W.
Carrier Corporation
Curtin J. Raymond
Hayter Robert P.
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