Injection valve with a capacitive valve lift sensor

Fluid sprinkling – spraying – and diffusing – With signals – indicators – recorders – meters or changeable... – Position or extent of motion indicator

Reexamination Certificate

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C239S071000, C239S102200, C239S584000, C239S585100, C073S114220, C123S617000

Reexamination Certificate

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07055762

ABSTRACT:
The invention relates to an injection valve in which the movable valve parts and the valve seat (4) form the electrodes of a capacitor that is connected in an electric circuit, the capacity of said capacitor changing with the valve lift of the closing element. According to the invention, the valve seat (4) is configured in the form of an electrically conductive nozzle body (2) that is connected to the electric circuit and the closing element is configured in the form of a valve needle (5) that is connected to the electric circuit by its end surface opposite the valve seat (4).

REFERENCES:
patent: 3942366 (1976-03-01), Hofmann
patent: 4183467 (1980-01-01), Sheraton et al.
patent: 4366706 (1983-01-01), Wolff
patent: 4397180 (1983-08-01), Wolff et al.
patent: 4414845 (1983-11-01), Hofmann
patent: 4573349 (1986-03-01), Slindee
patent: 6057692 (2000-05-01), Allmendinger et al.
patent: 6637697 (2003-10-01), Wienberg
patent: 31 17 779 (1982-11-01), None
patent: 34 38 048 (1985-05-01), None
patent: 198 30 667 (2000-01-01), None
patent: 197 51 661 (2000-08-01), None
patent: 2 295 247 (1976-07-01), None

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