The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 19, 1990
Filed:
May. 25, 1989
Koji Hayata, Shizuoka, JP;
Bailey Japan Co., Ltd., Shizuoka, JP;
Abstract
A pressure sensing transmitter comprises a housing, a sensor base, a ceramic sensor, thick film resistor members, an isolation diaphragm, and an isolation fluid. A sensing surface contacting with the isolation fluid is formed with a spherical surface form, the thick film resistor members are sintered on a sintering surface of an opposite side against the sensing surface projection area, and a test fluid flow is isolated from the sensing mechanism by a metal diaphragm so that a process fluid pressure is transferred indirectly to the sensing element. According to the invention, since each of the thick film resistor members 14A and 14B are sintered at both the interior and exterior of the sensing surface projection area 13C, a sintering area can be made larger than that of a conventional one, so that a larger output can be maintained without losing any characteristic of the thick film resistor member. This arrangement also provides a higher degree of precision, long life stability, as well as increased safety and reliability.