Measuring and testing – Fluid pressure gauge – Combined
Patent
1996-08-05
1997-04-15
Chilcot, Richard
Measuring and testing
Fluid pressure gauge
Combined
73700, G01L 700
Patent
active
056211767
ABSTRACT:
A pressure sensor into which the internal pressure of a fuel tank is introduced through a nipple portion and the atmospheric pressure is introduced through an atmosphere introducing hole, and a pressure difference between the internal pressure and the atmospheric pressure is detected by a diaphragm, comprises a check valve provided in the nipple portion to prevent fuel from leaking out to the atmospheric side. A pressure buffer chamber in the nipple portion of the pressure sensor is provided in which a ball is installed. A bottom face of the pressure buffer chamber is formed to be concave, and a receiving seat for receiving the ball is provided on the bottom face. Therefore, no fuel leaks outside, even when the vehicle comes across an accident and overturns sideways under the condition that the diaphragm used as a sensor element is fractured in the measurement of internal pressure of the fuel tank.
REFERENCES:
patent: 3995710 (1976-12-01), Courtot
patent: 4041967 (1977-08-01), Tsukisaka
patent: 4171712 (1979-10-01), DeForrest
patent: 4212316 (1980-07-01), Basch
patent: 5220837 (1993-06-01), Silverwater
patent: 5375472 (1994-12-01), Mitani et al.
patent: 5386730 (1995-02-01), Ikeda et al.
patent: 5419182 (1995-05-01), Koshimizu et al.
Mitani Tateki
Nagano Susumu
Chilcot Richard
Mitsubishi Denki & Kabushiki Kaisha
Noori Max H.
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