Method for dielectrically joining tubular members

Details Method for dielectrically joining tubular members Method for dielectrically joining tubular members

1983-02-01

1985-10-15

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1057, 219 1053, 219 1081, 1562744, H05B 654

Patent

active

045476411

ABSTRACT:
A method of dielectrically joining the mated ends of tubular members is, specifically, used in the formation of a cannula for insertion into a body cavity, duct, or vessel of a patient. The cannula preferably includes a parent cannula member and an integrally joined tip. The method comprises the steps of joining the mated ends of the tubular members to form a common joint, passing a high frequency electrical current between the electrodes of a dielectric heating device and through the mated ends of the tubular members to heat and fuse them together at said joint, concentrating the heat at the joint to form an integral cannula, permitting the hot air surrounding the joint to escape in order to prevent the burning or scorching of said cannula, pressurizing the joint to facilitate the escape of the hot air and to eliminate dimensional differences in the mated ends, and forming the mated ends of the tubular members while in a heated condition to provide smooth surfaces on the cannula.

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