Combined summing and underspeed valve

Details Combined summing and underspeed valve Combined summing and underspeed valve

1977-03-22

1978-03-28

Nilson, Robert G.

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

60449, 417216, F04B 4908

Patent

active

040809790

ABSTRACT:
A combined summing and underspeed valve including a valve body having a bore, a spool within the bore, an outlet from the bore in the body intermediate the ends of the bore, a pair of spaced inlets in the bore for receiving fluid under pressure to apply force to opposite ends of the spool, at least two additional inlets in the body for receiving fluid under pressure to apply force to one of the ends of the spool, and pistons for isolating fluid from the inlet of the pair applying force to the spool one end from fluid from the additional inlets while applying force to the spool.

REFERENCES:
patent: 3543508 (1970-12-01), Schwab
patent: 3732036 (1973-05-01), Busbey
patent: 3841795 (1974-10-01), Ferre

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