Single turn induction heating coil

Details Single turn induction heating coil Single turn induction heating coil

1997-07-08

1999-02-23

Leung, Philip H.

Electric heating

Inductive heating

With heat exchange

219634, 219635, 219672, 219674, H05B 610, H05B 640

Patent

active

058747133

ABSTRACT:
A single turn induction heating coil provides a varied magnetic flux density for heating a portion of a load having a thermally and magnetically responsive sealant and tubing. The varied interior diameter of the cylindrical coil structure increases the magnetic flux density at the open ends of the coil or wherever desired, causing the ends of the magnetically responsive materials contained within the coil to be heated at a rate comparable to the middle portion of the coil. Consequently, the sealant and tubing recover faster and more uniformly avoiding the high incidence of tubing "flare up" or "flip back" common with typical single or multi-turn induction coil heaters. In the preferred application, heating produces a complete fluid block in a cable load section within the coil without overheating or damaging the load.

REFERENCES:
patent: 3238346 (1966-03-01), Savko
patent: 3631524 (1971-12-01), Denner
patent: 3665138 (1972-05-01), Edge et al.
patent: 3689727 (1972-09-01), Morris
patent: 3699302 (1972-10-01), Griffith
patent: 4300031 (1981-11-01), Reboux et al.
patent: 4853510 (1989-08-01), Mohr et al.
patent: 4972042 (1990-11-01), Seabourne et al.
patent: 5214258 (1993-05-01), Akers
patent: 5378879 (1995-01-01), Monovoukas
patent: 5630958 (1997-05-01), Stewart, Jr. et al.

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