Control box

Details Control box Control box

2005-11-29

2005-11-29

Oen, William (Department: 2855)

Measuring and testing

Fluid pressure gauge

With protective separator

Reexamination Certificate

active

06968742

ABSTRACT:
A control box for use, for example, to open and close a bypass valve (18, 19) of a turbocharger, in which the closing movement occurs with higher force than the opening movement, wherein the closing movement occurs in the direction of a spring force and the opening movement in the direction against said spring force. The control box comprises two pressure chambers (4, 6) and both pressure chambers may be set to either atmospheric pressure or negative pressure.

REFERENCES:
patent: 4028441 (1977-06-01), Richards
patent: 4052969 (1977-10-01), Ando et al.
patent: 4148334 (1979-04-01), Richards
patent: 4484445 (1984-11-01), Gillbrand
patent: 4683863 (1987-08-01), Sugiura
patent: 4727848 (1988-03-01), Stumpp et al.
patent: 4741163 (1988-05-01), Hidaka et al.
patent: 5333456 (1994-08-01), Bollinger

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