Induction heating coil assembly and method for hardening inner s

Details Induction heating coil assembly and method for hardening inner s Induction heating coil assembly and method for hardening inner s

1994-11-15

1996-01-30

Leung, Philip H.

Electric heating

Inductive heating

Specific heating application

219675, 148571, 266129, H05B 638

Patent

active

054882192

ABSTRACT:
An induction heating coil for forming a hardened layer in the inner wall of an external cylindrical member to be heated is disclosed. On the inner wall of the conductive induction member, a plurality of recess portions are formed at predetermined spaces circumferentially. The portions of the inner wall of the external cylindrical member to be heated which are opposed to the recess portions can be separately heated, in order collectively to form a plurality of separate partial hardened layers in the inner wall of the external cylindrical member to be heated circumferentially.

REFERENCES:
patent: 3236993 (1966-02-01), Jones
patent: 3980853 (1976-09-01), Morisaki
patent: 4401485 (1983-08-01), Novorsky
patent: 4625090 (1986-11-01), Pfaffmann et al.

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