Oxygen concentration sensor
First Claim
1. An oxygen concentration sensor comprising:
- a solid electrolyte member including two portions, one portion being exposed to a gas of interest and the other portion being exposed to the atmosphere;
an inner cover member formed with a first space communicating portion arranged to communicate with said other portion of said solid electrolyte member;
a water-proof cover member enclosing said inner cover member and defining with said inner cover member a ventilating passage, said water-proof cover member being formed with a second space communicating portion for maintaining the first space communicating portion of said inner cover member in communication with the atmosphere through said ventilating passage, said second space communicating portion of said water-proof cover member being axially spaced apart from said first space communicating portion of said inner cover member; and
means, disposed in said ventilating passage between said first and second space communicating portions and spaced axially from said first space communicating portion, for impeding the flow of water through said ventilating passage.
1 Assignment
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Accused Products
Abstract
An oxygen concentration sensor including a solid electrolyte member having two portions, one portion being exposed to a gas of interest and the other portion being exposed to the atmosphere, an inner cover formed with a first space communicating portion arranged to communicate with the other portion of the solid electrolyte member, and a water-proof cover enclosing the inner cover to define a ventilating passage between the inner cover and the water-proof cover and formed with a second space communicating portion maintaining the first space communicating portion of the inner cover in communication with the atmosphere through the ventilating passage. The second space communicating portion of the water-proof cover is axially spaced apart from the first space communicating portion of the inner cover by a predetermined distance. Also included is structure to prohibit the flow of water through said ventilating passage. The second space communicating portion is separated from this structure.
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Citations
9 Claims
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1. An oxygen concentration sensor comprising:
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a solid electrolyte member including two portions, one portion being exposed to a gas of interest and the other portion being exposed to the atmosphere; an inner cover member formed with a first space communicating portion arranged to communicate with said other portion of said solid electrolyte member; a water-proof cover member enclosing said inner cover member and defining with said inner cover member a ventilating passage, said water-proof cover member being formed with a second space communicating portion for maintaining the first space communicating portion of said inner cover member in communication with the atmosphere through said ventilating passage, said second space communicating portion of said water-proof cover member being axially spaced apart from said first space communicating portion of said inner cover member; and means, disposed in said ventilating passage between said first and second space communicating portions and spaced axially from said first space communicating portion, for impeding the flow of water through said ventilating passage. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9)
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3. An oxygen concentration sensor comprising:
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a solid electrolyte member including two portions, one portion being exposed to a gas of interest and the other portion being exposed to the atmosphere; an inner cover member formed with a first space communicating portion arranged to communicate with said other portion of said solid electrolyte member; a water-proof cover member enclosing said inner cover member and defining with said inner cover member a ventilating passage, said water-proof cover member being formed with a second space communicating portion maintaining said first space communicating portion of said inner cover member in communication with the atmosphere through said ventilating passage, said second space communicating portion of said water-proof cover member being axially spaced apart from said first space communicating portion of said inner cover member; a housing formed of metal caulked at one end portion for securing said inner cover member thereto and supporting said solid electrolyte member, said second space communicating portion of said water-proof cover member being defined by a clearance partially defined between said caulked one end portion of said housing and an end portion of said water-proof cover member; and means, disposed in said ventilating passage between said first and second space communicating portions and spaced axially from said first space communicating portion, for impeding the flow of water through said ventilating passage.
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Specification