Measuring and testing – Instrument casing
Reexamination Certificate
2005-02-22
2005-02-22
Cygan, Michael (Department: 2855)
Measuring and testing
Instrument casing
C073S023200, C073S031050
Reexamination Certificate
active
06857316
ABSTRACT:
A gas sensor includes a sensor element having a specific function, and a housing containing the sensor element therein and including a thread section, and a sealing surface which forms a sealing section together with an installation section at a position deeper than the thread section in a direction in which the sensor element is inserted. When the housing is screwed into the installation section, the release torque of the housing at 850° C. (1123 K) is 9 N·m or more, and an estimated value of a gap formed between the sealing surface and the installation section at 850° C. (1123 K) that is calculated according to a specific equation is 31 μm or less.
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Ikoma Nobukazu
Kurachi Hiroshi
Lee Sang Jae
Burr & Brown
Cygan Michael
NGK Insulators Ltd.
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