Fluid handling – Systems – Multi-way valve unit
Reexamination Certificate
2007-05-01
2007-05-01
Rivell, John (Department: 3753)
Fluid handling
Systems
Multi-way valve unit
C137S625270, C251S282000
Reexamination Certificate
active
10953701
ABSTRACT:
A fluid control valve includes a valve body having both fluid inlet and discharge ports. A flow passage axially extending within the valve body communicates with the inlet and discharge ports. A valve member within the flow passage is movable by an actuator force in a first direction to direct a pressurized fluid from the inlet to the discharge port. The valve member includes first and second valve heads having different diameters and a valve seating member. The valve seating member engages first and second sealing diameters of the flow passage, the second sealing diameter being smaller than the first. Fluid pressure acting on the different diameters of the first valve head and valve seating member in contact with the second sealing diameter creates a net return force directing the valve member in a second direction opposite to the first direction upon removal of the actuator force.
REFERENCES:
patent: 1590359 (1926-06-01), Foote
patent: 2342763 (1944-02-01), Smith
patent: 2485192 (1949-10-01), Eickstaedt
patent: 2912006 (1959-11-01), Cooksley
patent: 2934090 (1960-04-01), Kenann et al.
patent: 3016920 (1962-01-01), Thomsen et al.
patent: 3202182 (1965-08-01), Haviland
patent: 3498331 (1970-03-01), Grune
patent: 3732893 (1973-05-01), Ziesche et al.
patent: 4074700 (1978-02-01), Engle
patent: 4298027 (1981-11-01), Neff
patent: 4574844 (1986-03-01), Neff et al.
patent: 4641686 (1987-02-01), Thompson
patent: 4915134 (1990-04-01), Toliusis et al.
patent: 6668861 (2003-12-01), Williams
patent: 6802298 (2004-10-01), Yoshimura et al.
patent: 2003/0213523 (2003-11-01), Neff
European Search Report dated Jan. 17, 2006 (7 pgs).
Janssen Eric P
Long Lynn R
Neff Robert H
Harness & Dickey & Pierce P.L.C.
Mac Valves Inc.
Rivell John
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