Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1977-12-12
1979-07-31
Larson, Lowell A.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29432, 285 3, 403283, 403293, B23P 1500, F16L 3500
Patent
active
041625668
ABSTRACT:
A method and coupling for severing and rejoining sealed tubing without the loss of the seal especially adapted to the installation of charged refrigerant lines into the refrigerator cabinetry. The method includes the crimping of the tubing wall at the point to be severed, sealing of the crimped tube walls, as by welding, and severing of the tube through the crimp. To rejoin the ends, a rejoinder coupling is utilized having end sections receiving and sealed to the crimped tube ends. The coupling also includes an axially compressible body section within which is disposed a piercing tool having a pair of penetrating ends adapted to pierce each of the crimped tube ends upon pushing the tube ends together, the compressible body section accommodating the axial tube movement toward each other in carrying out the piercing. The piercing tool is adapted to accommodate fluid flow through the pierced opening either by one or more flow passages provided in the tool itself or by withdrawal of the piercing tool from the pierced opening in each crimped tube end. Several embodiments of the piercing tool configuration are disclosed, each of which provides a locating arrangement adapted to assure penetration of both crimped tube ends when the tube ends are pushed together. The crimp configuration produces a relatively large transverse area for penetration by the piercing tool.
REFERENCES:
patent: 2276571 (1942-03-01), Grypma
patent: 2469975 (1949-05-01), McCloy
patent: 2714447 (1955-08-01), Gardes
patent: 2933333 (1960-04-01), Bredtschneider et al.
patent: 3127892 (1964-04-01), Bellamy, Jr. et al.
patent: 3902489 (1975-09-01), Carter
patent: 4004586 (1977-01-01), Christensen et al.
Crane Daniel C.
General Electric Company
Larson Lowell A.
Reams Radford M.
Weidner Frederick P.
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