Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Reexamination Certificate
2007-04-03
2007-04-03
Fox, John (Department: 3753)
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
C137S509000, C137S614030
Reexamination Certificate
active
11122697
ABSTRACT:
A decompression valve assembly is normally open thereby allowing thermal pressure build-up in an auxiliary circuit to be dissipated via a bleed path. During operation, the bleed path is sealed by a check valve, whereby high pressure flow can be fully directed to the work tool powered by the auxiliary circuit, for high system efficiency. In addition, a velocity fuse feature limits the rate of flow to the bleed path, thereby to allow for controlled release of pressure from the auxiliary circuit, as is desirable to protect against a rapidly falling load.
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Fox John
Parker-Hannifin Corporation
Renner , Otto, Boisselle & Sklar, LLP
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