Thermal fuse employing thermosensitive pellet

Details Thermal fuse employing thermosensitive pellet Thermal fuse employing thermosensitive pellet

2008-09-23

2010-11-30

Vortman, Anatoly (Department: 2835)

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With fusible, combustible or explosive material

C337S401000, C337S407000, C337S298000

Reexamination Certificate

active

07843307

ABSTRACT:
A thermal fuse employing a thermosensitive pellet is provided, which exhibits stabilized characteristics in a low operating temperature region. The thermal fuse includes at least a switching movable member, a thermosensitive pellet member, a pair of leads having a first lead portion and a second lead portion, and a metal casing. The thermosensitive pellet member contains a polyolefin wax. The thermosensitive pellet member is housed in the metal casing to which the pair of leads are attached. The switching movable member is operated by deformation associated with softening or melting of the thermosensitive pellet member, to attain a cut-off state between the pair of leads. The thermal fuse employing a thermosensitive pellet is suitable for an operating temperature of 50 to 180° C. Furthermore, in the thermosensitive pellet member the polyolefin wax is mixed with a thermoplastic resin as appropriate, to thereby provide a thermal fuse employing a thermosensitive pellet which increases the response speed while maintaining the operating temperature with high accuracy.

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