Method for filling a cavity, such as a sensor cavity, with an in

Details Method for filling a cavity, such as a sensor cavity, with an in Method for filling a cavity, such as a sensor cavity, with an in

1989-07-31

1990-05-29

Gorski, Joseph M./

Metal working

Method of mechanical manufacture

Combined manufacture including applying or shaping of fluent...

29451, 295271, 29593, 29DIG44, 73756, 141 5, 141 59, 141 65, B23P 1904, B65B 304

Patent

active

049283766

ABSTRACT:
A method for oil filling an internal pressure sensor cavity (20) is disclosed which minimizes manufacturing process time and insures totally and properly filling the internal cavity with oil. A predetermined amount of oil (23) is added to a pressure sensor external cavity (21) connected through an opening (22) to an internal sensor cavity (20) having a sensing element (17) therein. A vacuum is drawn while the oil is in the external cavity thus providing at least a partial vacuum in at least the internal cavity. Then vacuum pressure is released causing the oil to be drawn into the internal cavity through the opening. Subsequently a sealing means (27) is force fit in the opening to seal the internal cavity.

REFERENCES:
patent: H606 (1989-03-01), Ahn et al.
patent: 4425799 (1984-01-01), Pak
patent: 4610256 (1986-09-01), Wallace
patent: 4655700 (1987-04-01), Ahmed
patent: 4686764 (1987-08-01), Adams et al.
patent: 4697643 (1987-10-01), Sassier
patent: 4732042 (1988-03-01), Adams
patent: 4746317 (1988-05-01), Kaiser et al.
patent: 4833922 (1989-05-01), Friek et al.

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