Temperature sensor

Details Temperature sensor Temperature sensor

2006-02-14

2006-02-14

Verbitsky, Gail (Department: 2859)

Thermal measuring and testing

Housing, support, or adjunct

C374S144000, C374S163000, C338S028000

Reexamination Certificate

active

06997607

ABSTRACT:
A cylindrical metal tube (3) accommodating therein a thermistor device (2), the electric characteristics of which change with temperature, is pushed into, or clamped and fixed to, a sheath portion (42) positioned on a flange (4) to the rear of a projection portion (41) of the flange (4), and is laser welded in a circumferential direction. A weld portion (L1) formed to bridge the metal tube (3) and the sheath portion (42) of the flange (4) firmly fixes the metal tube (3) to the flange (4). In the temperature sensor (1) having this construction, the weld portion (L1) between the metal tube (3) and the flange (4) is not exposed to a high temperature environment. Therefore, oxidation hardly occurs at the weld portion and reliability of air tightness to an exhaust gas can be improved.

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