Bobbin for an encapsulated coil of a solenoid assembly

Details Bobbin for an encapsulated coil of a solenoid assembly Bobbin for an encapsulated coil of a solenoid assembly

1998-08-03

2000-10-03

Gellner, Michael L.

Inductor devices

Coil or coil turn supports or spacers

Coil on a preformed support or mount

336198, 336 96, H01F 2702, H01F 2730

Patent

active

061279129

ABSTRACT:
A bobbin for an encapsulated coil is provided for use in a coil assembly in which flange portions are provided on each end to ensure that during the process of encapsulating the coil with an over-molded material a positive seal is established between the bobbin and the over-molded material. Each of the flange portions have first, second, and third flange sections and each of the flange sections have predetermined diameters and peripheral surfaces that are angled with respect to a reference axis of a hole defined in the bobbin. The thin sharp edges formed by the peripheral surfaces of the respective flange sections melt back during the over-molding process. This melt back creates an intricate blend between the over-molded material and the bobbin thus producing a positive seal therebetween.

REFERENCES:
patent: 4682136 (1987-07-01), Prokop
patent: 4701999 (1987-10-01), Palmer
patent: 5281940 (1994-01-01), Goto
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patent: 5497136 (1996-03-01), Wall
patent: 5508671 (1996-04-01), Takashi
patent: 5524334 (1996-06-01), Boesel
patent: 5527117 (1996-06-01), Roy
patent: 5533249 (1996-07-01), Wakeman
patent: 5538220 (1996-07-01), LaMarca
patent: 5588414 (1996-12-01), Hrytzak et al.
patent: 5589808 (1996-12-01), Clark et al.
DuPont Engineering Plymers Product Information, "Electrical/Electronic Thermoplastic Encapsulation".
DuPont Engineering Polymers, "Coil Encapsulation with Thermoplastic Resins," Mark W. Wichmann, et al.

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