Measuring and testing – Fluid pressure gauge – Diaphragm
Patent
1996-07-26
1998-05-05
Oen, William L.
Measuring and testing
Fluid pressure gauge
Diaphragm
G01L 900
Patent
active
057476942
ABSTRACT:
A pressure sensor has a resin housing containing a pressure sensor positioned between a reference pressure chamber and a pressure to be measured. A terminal extends through the housing toward the sensor. A wire connects the terminal to the sensor. When a connector is connected to the terminal, it may compress air around the terminal. The compressed air may travel along the terminal and break the wire connected to the sensor. To prevent such breakage, a barrier wall is provided to block the compressed air from penetrating toward the wire. The reference pressure chamber is divided into a main chamber and a subchamber by the barrier wall. Since the barrier wall blocks the compressed air, the compressed air can not reach a silicon gel on the sensor and the wire in the main chamber. Therefore, the wire is protected.
REFERENCES:
patent: 3678753 (1972-07-01), Eggleston et al.
patent: 4866989 (1989-09-01), Lawless
patent: 5014557 (1991-05-01), Lawless
patent: 5029479 (1991-07-01), Bryan
patent: 5595939 (1997-01-01), Otake
Journal of Nippondenso Technical Disclosure No. 14-065 A Pedestal is fixed to a housing via a stem (Apr. 20, 1979).
Journal of Nippondenso Technical Disclosure No. 75-085. A pedestal is fixed to a housing via stem Nov. 15, 1995.
Journal of Nippondenso Technical Disclosure No. 57-129. A filter 2 is provided Mar. 15, 1985.
Journal of Nippondenso Technical Disclosure No. 61-053. A tip of a pressure introduction pipe is formed as illustrated in Figure 2. Sep. 15, 1988.
Journal of Nippondenso Technical Disclosure No. 40-108. Atip of a projection port is formed in tapered shape Mar. 15, 1985.
Baba Horonobu
Imai Masahito
Mizuno Tiaki
Shimoyama Yasuki
Takakuwa Masaki
Nippondenso Co. Ltd.
Oen William L.
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