Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1976-12-01
1978-02-28
Weakley, Harold W.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
137510, F16K 3112
Patent
active
040760421
ABSTRACT:
The invention relates to a cut-off valve assembly for an oil burner assembly. The cut-off valve is of the type which is spring biased and rapidly opens and closes above and below a predetermined pump pressure. The rapid closing is to prevent fuel oil from dripping from the nozzle. The valve assembly has an expansible chamber formed with a diaphragm. The chamber has inlet and outlet ports with a valve seat formed on the outlet port. A spring biased adjustment element has a disk shaped portion below the diaphragm which carries a closure member for the outlet port. The face of the closure member is displaceable relative to the disk shaped portion and is of a larger diameter than the diameter of the valve seat for the outlet port. The closure member is a member loaded by a lever and the lever is supported on the one side approximately centrally on a bearing loaded by the desired value spring and on the other side, the side opposite the closure member, at an eccentric position of the servo-element by way of a shorter lever arm. With this construction the elastic force loading the closure member is derived from the desired value spring but converted by the lever to a value corresponding to the size of the closure member. This construction facilitates the rapid opening and closing of the cut-off valve assembly.
REFERENCES:
patent: 3099997 (1963-08-01), Krottke
patent: 3414009 (1968-12-01), Merchant
patent: 3419039 (1968-12-01), Monnich
patent: 3754567 (1973-08-01), Whitten
Danfoss A/S
Weakley Harold W.
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