Pressure sensor
First Claim
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1. A pressure sensor which comprises:
- a pressure sensor element;
a pedestal having a through-hole defined therein for guiding an external pressure to the pressure sensor element, said pressure sensor element being tightly mounted on the pedestal; and
a header, said pedestal being tightly mounted on the header; and
a cap for covering the pressure sensor element and the pedestal and mounted tightly on the header so as to enclose the pressure sensor element and the pedestal;
wherein a region of the header ranging from a joint between the cap and the header to a joint between the pedestal and the header is stepped so as to form a projection inside said cap and a recess opposite said projection.
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Abstract
A pressure sensor including a pressure sensor element, a pedestal having a through-hole defined therein for guiding an external pressure to the pressure sensor element and a header, all of which are successively tightly bonded together. The pressure sensor also includes a cap for covering the pressure sensor element and the pedestal and mounted tightly on the header. A region of the header ranging from a joint between the cap and the header to a joint between the pedestal and the header is stepped.
61 Citations
4 Claims
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1. A pressure sensor which comprises:
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a pressure sensor element; a pedestal having a through-hole defined therein for guiding an external pressure to the pressure sensor element, said pressure sensor element being tightly mounted on the pedestal; and a header, said pedestal being tightly mounted on the header; and a cap for covering the pressure sensor element and the pedestal and mounted tightly on the header so as to enclose the pressure sensor element and the pedestal; wherein a region of the header ranging from a joint between the cap and the header to a joint between the pedestal and the header is stepped so as to form a projection inside said cap and a recess opposite said projection.
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2. A pressure sensor which comprises:
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a pressure sensor element; a pedestal having a through-hole defined therein for guiding an external pressure to the pressure sensor element, said pressure sensor element being tightly mounted on the pedestal; and a header, said pedestal being tightly mounted on the header; and a cap for covering the pressure sensor element and the pedestal and mounted tightly on the header so as to enclose the pressure sensor element and the pedestal; wherein a region of the header ranging from a joint between the cap and the header to a joint between the pedestal and the header is stepped; and wherein said region of the header is stepped to provide a substantially cylindrical projection defined at a center portion of the header so as to protrude inside the cap, said cylindrical projection having a diameter greater than a diameter of the through-hole, but smaller than a diameter of an imaginary circle that inscribes the pedestal. - View Dependent Claims (3)
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4. A pressure sensor which comprises:
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a pressure sensor element; a pedestal having a through-hole defined therein for guiding an external pressure to the pressure sensor element, said pressure sensor element being tightly mounted on the pedestal; and a header, said pedestal being tightly mounted on the header; and a cap for covering the pressure sensor element and the pedestal and mounted tightly on the header so as to enclose the pressure sensor element and the pedestal; wherein a region of the header ranging from a joint between the cap and the header to a joint between the pedestal and the header is stepped; and wherein the header has an outer peripheral region set back a predetermined distance to a level below the remaining portion of the header to define an annular counter-flange where the cap is welded to the header.
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Specification