Differential pressure gauge
First Claim
1. A differential pressure gauge comprising:
- a tubular body having a terminal box formed on the circumference thereof, said box being unitary with said tubular body and extending outwardly of said circumference;
a first plate-like member having a through hole therein, said first plate-like member being fixed to the tubular body to close one end of said body, said first plate-like member and said tubular body being provided with portions that abut one another in a plane perpendicular to the axis of said tubular body;
a second plate-like member fixed to the tubular body to close the other end thereof;
a displacement transducer fixedly mounted on the tubular body within a region defined by the tubular body and the first and second plate-like members, the opposing sides of said displacement transducer being disposed in facing relation respectively to surfaces of said first and second plate-like members and being spaced from said surfaces of said first and second plate-like members by intervening air gaps operative to assure that any deformation of either of said plate-like members is incapable of achieving contact between said surface of said plate-like member and the facing side of said transducer,a first pressure receiving member mounted on the tubular body on the outside of the first plate-like member;
first pressure transmitting means for transmitting to the displacement transducer an external pressure received by the first pressure receiving member; and
first limiting means for receiving by the first plate-like member a deflection of the first pressure receiving member in excess of a predetermined value caused by an overpressure from the outside, whereby the overpressure received by the first plate-like member is supported by the tubular body.
1 Assignment
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Accused Products
Abstract
A tubular body is closed at both ends by first and second plate-like members, respectively and a transducer for converting a deflection into an electric signal is provided between the first and second plate-like members. A through hole is made in at least one of the plate-like members and, on the outside of the plate-like member, a pressure receiving member is disposed. A pressure received by the pressure receiving member is transmitted to the transducer to deflect its moving part. When an overpressure larger than a measuring pressure is applied to the pressure receiving member to deflect it in excess of a predetermined value, the deflection is limited by one of the plate-like members to define a space between the plate-like member and the transducer, thereby to prevent the transducer from being affected by the overpressure received by the plate-like member.
51 Citations
16 Claims
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1. A differential pressure gauge comprising:
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a tubular body having a terminal box formed on the circumference thereof, said box being unitary with said tubular body and extending outwardly of said circumference; a first plate-like member having a through hole therein, said first plate-like member being fixed to the tubular body to close one end of said body, said first plate-like member and said tubular body being provided with portions that abut one another in a plane perpendicular to the axis of said tubular body; a second plate-like member fixed to the tubular body to close the other end thereof; a displacement transducer fixedly mounted on the tubular body within a region defined by the tubular body and the first and second plate-like members, the opposing sides of said displacement transducer being disposed in facing relation respectively to surfaces of said first and second plate-like members and being spaced from said surfaces of said first and second plate-like members by intervening air gaps operative to assure that any deformation of either of said plate-like members is incapable of achieving contact between said surface of said plate-like member and the facing side of said transducer, a first pressure receiving member mounted on the tubular body on the outside of the first plate-like member; first pressure transmitting means for transmitting to the displacement transducer an external pressure received by the first pressure receiving member; and first limiting means for receiving by the first plate-like member a deflection of the first pressure receiving member in excess of a predetermined value caused by an overpressure from the outside, whereby the overpressure received by the first plate-like member is supported by the tubular body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification