Pressure sensor housing
First Claim
1. An apparatus for measuring atmospheric pressure for compensating a pressure measurement in a sealed enclosure, comprising:
- a housing, one end of said housing being open;
a cover positioned on said housing, said cover being constructed to be received on the open end of said housing for providing a sealing fit therewith, said cover having an opening therethrough for allowing pressure equalization with an interior of said housing;
a gasket interposed between said cover and said housing, said gasket being constructed of a material that provides a fluid-tight seal between said cover and said housing, said gasket having at least one passage of a predetermined size for allowing passage of air between said opening in said cover and said interior of said housing;
a gas permeable membrane also interposed between said opening in said cover and said housing, said gas permeable membrane being constructed of a material that allows air to pass therethrough;
a pressure sensor positioned within said housing for measuring atmospheric pressure based upon the air passed through said gas permeable membrane into said housing; and
means for receiving a pressure signal from a sealed enclosure and compensating the pressure signal based upon the measured atmospheric pressure.
1 Assignment
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Accused Products
Abstract
An apparatus (10) allows atmospheric pressure into an environmentally sealed enclosure for creating an equilibrium that allows a sensor (28) make a proper measurement. A slot or opening (26) in the cover (14) exposes outside atmospheric air to a restricted portion of a gas permeable membrane (18). The membrane (18) allows a selected gas to pass through the membrane (18) creating the equilibrium in the housing (12). A gasket (16) positioned between the cover (14) and housing (12) seals the housing in an air tight manner except for the gases allowed in through the membrane (18). Pressure sensor (28) can then make a more accurate measurement. Apparatus (10) finds particular utility in a low pressure tire management system.
53 Citations
20 Claims
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1. An apparatus for measuring atmospheric pressure for compensating a pressure measurement in a sealed enclosure, comprising:
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a housing, one end of said housing being open; a cover positioned on said housing, said cover being constructed to be received on the open end of said housing for providing a sealing fit therewith, said cover having an opening therethrough for allowing pressure equalization with an interior of said housing; a gasket interposed between said cover and said housing, said gasket being constructed of a material that provides a fluid-tight seal between said cover and said housing, said gasket having at least one passage of a predetermined size for allowing passage of air between said opening in said cover and said interior of said housing; a gas permeable membrane also interposed between said opening in said cover and said housing, said gas permeable membrane being constructed of a material that allows air to pass therethrough; a pressure sensor positioned within said housing for measuring atmospheric pressure based upon the air passed through said gas permeable membrane into said housing; and means for receiving a pressure signal from a sealed enclosure and compensating the pressure signal based upon the measured atmospheric pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 17)
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11. A tire pressure management receiver for compensating for atmospheric pressure comprising:
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a housing having an open end, a bottom, and a wall; a cover constructed to be positioned within said open end of said housing, said cover and said housing together defining a sealed enclosure and having an opening for allowing, air to pass therein; a gas permeable membrane covering the opening in said sealed enclosure, said gas permeable membrane selectively allowing air to pass into the sealed enclosure; a pressure sensor situated within said sealed enclosure for measuring atmospheric pressure; and means for receiving a plurality of pressure signals from remote tire pressure sensors and compensating pressure signals therefrom based upon the atmospheric pressure. - View Dependent Claims (16)
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18. A method for compensating a pressure measurement for atmospheric pressure comprising the steps of:
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providing a housing, the housing having an open end, a bottom, and a wall; providing an opening in the housing for allowing air therein when the housing is sealed; covering the opening with a gas permeable membrane; positioning a pressure sensor and circuit means for remotely receiving a pressure signal within the housing; sealing the housing with a cover constructed to seal the open end securely; measuring atmospheric pressure from the air in the sealed housing; receiving a pressure signal from a remote pressure sensor; and compensating the remote pressure signal based upon the measured atmospheric pressure. - View Dependent Claims (19, 20)
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Specification