Fluid handling – With indicator – register – recorder – alarm or inspection means – Plural
Reexamination Certificate
2008-07-15
2008-07-15
Rivell, John (Department: 3753)
Fluid handling
With indicator, register, recorder, alarm or inspection means
Plural
C137S554000, C137S884000
Reexamination Certificate
active
11149904
ABSTRACT:
The invention concerns a valve arrangement (1) with a high-pressure connection (P), a low-pressure connection (T), at least one control valve (2to5), which is accommodated in a control valve module and has at least one working connection (A, B) for a hydraulic consumer (7to10), and a safety valve (6), which is accommodated in a safety valve module, and which releases or blocks a passage between the high-pressure connection (P) and the control valves (2to5), the control valve module (2to5) and the safety valve module (6) being connected to one component group. It is endeavoured to provide a valve arrangement with a high safety level. For this purpose, it is ensured that each control valve (2to5, 2′ to5′) has an error detection device (19), that the safety valve module (6) has a safety switch device (21) and that the component group has a connection (20) between the safety switch device (21) and the error detection device (19).
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Sauer Danfoss PVSK Module Technical Information for “PVSK Module with Integrated Diverter Valve and P-Disconnect Function” dated Jan. 2003, Rev. A, pp. 1-7 and Appendix.
Danfoss Hydraulics Catalogue for “Load-Independent Proportional Valve Type PVG 32” dated Dec. 1998, Book 8, Partition 2, pp. 1-40.
Hjorth Henrik
Vester Jens
McCormick Paulding & Huber LLP
Rivell John
Sauer-Danfoss Aps
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