Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1990-10-15
1991-12-31
Hepperle, Stephen M.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
13750538, 137510, 137907, G05D 1602
Patent
active
050763229
ABSTRACT:
A device for limiting the applied vacuum in a fluid suctioning system comprising a chamber having an inlet at which a suction level or levels V.sub.x is or are to be maintained, and an outlet to which vacuum level V.sub.2 is applied, wherein V.sub.x <V.sub.2, fluid being sucked through the shapes via the inlet and outlet; an annular seat in the chamber, the chamber containing an upstream flow zone R.sub.1 between the inlet and the seat, and a downstream flow zone R.sub.2 between the seat and the outlet; and a diaphragm at the upstream side of the seat and extending crosswise thereof and crosswise of at least a portion of the zone R.sub.1, the diaphragm carried for movement toward the seat when the vacuum level in R.sub.1 rises to a predetermined level, to reduce or block fluid flow through the chamber, the diaphragm movable away from the seat when the vacuum level in R.sub.1 falls below a predetermined level.
REFERENCES:
patent: 2394911 (1946-02-01), Griswold
patent: 3144044 (1964-08-01), Anthes
patent: 3469582 (1969-09-01), Jackson
patent: 4044735 (1977-08-01), Sumiyoshi
patent: 4416307 (1983-11-01), Detweiler
patent: 4592385 (1986-06-01), Semon
Choksi Pradip
Choksi Rekha P.
Haefliger William W.
Hepperle Stephen M.
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