Flow control apparatus

Details Flow control apparatus Flow control apparatus

2007-05-15

2007-05-15

Hepperle, Stephen M. (Department: 3753)

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

C137S115070, C137S115150

Reexamination Certificate

active

11067673

ABSTRACT:
In a flow control apparatus, a fluid pressure is introduced from downstream of a metering orifice to a rear room of a spool while a relief valve in the spool is assembled in advance. A front section of a relief valve sub-assembly is press fitted to a hole provided on the spool and is opening to rear room of the spool so that a receiving room of a valve body in a relief valve casing communicates to a bypass path. A communicating path provided in a rod communicates to the rear room of the spool through outside of the relief valve sub-assembly. The relief valve casing is received in a receiving hole provided in the spool and a cylindrical room between the relief valve casing and the receiving room is used as a part of a communicating path.

REFERENCES:
patent: 3426785 (1969-02-01), Brady et al.
patent: 4247311 (1981-01-01), Seibert et al.
patent: 5580817 (1996-12-01), Kortge
patent: 6041807 (2000-03-01), Honaga et al.
patent: 6328535 (2001-12-01), Brighton et al.

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