Fluid handling – Systems – Closed circulating system
Patent
1995-09-13
1998-02-10
Chambers, A. Michael
Fluid handling
Systems
Closed circulating system
137576, 251 636, E03B 707
Patent
active
057158649
ABSTRACT:
A device for relieving the pressure of pressurized materials, such as sprayable hot melt adhesives includes a storage tank (40), a manifold (44), a source of pressure for pressurizing the pressurized materials, and a dump valve (10) for relieving the pressure of the pressurized materials when the device is deactivated or turned off. The dump valve (10) includes a relief port (22) and a spring and compressed air arrangement for opening and closing the relief port (22). The dump valve (10) can be combined with a pressure relief valve and can be retrofitted to existing manifolds (44). A method of depressurizing a pressurized device for spraying pressurized material is also disclosed and includes the steps of activating a pressure means for pressurizing materials within a manifold, pressurizing the materials via the pressure means, deactivating the pressure means, and relieving the pressure of the materials when the pressurizing means is deactivated.
REFERENCES:
patent: 3115894 (1963-12-01), Marx
patent: 4360132 (1982-11-01), Vilagi et al.
patent: 4565217 (1986-01-01), McIntyre
patent: 4657047 (1987-04-01), Kolibas
patent: 5289810 (1994-03-01), Bauer et al.
Andel David F.
Jeter David R.
Chambers A. Michael
Emerson, Esq. Roger D.
Nordson Corporation
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