Fluid system with signal-mimicking device and associated method

Details Fluid system with signal-mimicking device and associated method Fluid system with signal-mimicking device and associated method

2006-08-25

2008-11-18

Leslie, Michael (Department: 3745)

Motors: expansible chamber type

Plural relatively movable or rigidly interconnected working...

Condition responsive means for modifying working member...

C060S422000

Reexamination Certificate

active

07451686

ABSTRACT:
A fluid system comprises a static LS valve, a dynamic LS valve, a priority valve biased to preferentially supply pressurized fluid to both the static LS valve and the dynamic LS valve, and a signal-mimicking device fluidly coupled to a static LS port of the static LS valve, a dynamic LS port of the dynamic LS valve, and a dynamic LS pilot port of the priority valve for mimicking a static LS signal from the static LS port of the static LS valve into a dynamic LS signal from the dynamic LS port of the dynamic LS valve to produce a combined LS signal communicated to the dynamic LS pilot port of the priority valve. Such a fluid system may be applied to a steering system. An associated method is disclosed.

REFERENCES:
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patent: 4665695 (1987-05-01), Rau et al.
patent: 5050696 (1991-09-01), McGovern et al.
patent: 5806561 (1998-09-01), Pedersen et al.
patent: 5826487 (1998-10-01), A'Hearn
patent: 6769348 (2004-08-01), Hudson et al.

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