Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Reexamination Certificate
2006-07-25
2006-07-25
Krishnamurthy, Ramesh (Department: 3753)
Fluid handling
Line condition change responsive valves
Pilot or servo controlled
C137S014000, C137S624110
Reexamination Certificate
active
07080658
ABSTRACT:
A fluid passage is emergently-closed in a short time without causing a water hammer by an extremely simple device and operation. A water hammerless closing device includes an actuator operated valve provided in a fluid passage, an electro-pneumatic conversion device for supplying a 2-step actuator operating pressure Pa to an actuator operated-type valve, a vibration sensor removably secured to the pipe passage on the upstream side of the actuator operated-type valve, and a tuning box receiving a vibration detection signal Pr from the vibration sensor and delivering a control signal Sc to the electro-pneumatic conversion device for controlling the step operating pressure Ps′ of the 2-step actuator operating pressure Pa so that, with the control signal Sc being regulated, the electro-pneumatic conversion device outputs the 2-step actuator operating pressure Pa with the step operating pressure Ps′ capable of bringing the vibration detection signal Pr substantially to zero.
REFERENCES:
patent: 5732929 (1998-03-01), Luppino et al.
patent: 6102072 (2000-08-01), Yokota et al.
patent: 6178997 (2001-01-01), Adams et al.
patent: 6889706 (2005-05-01), Fukano et al.
patent: 55-119923 (1980-08-01), None
patent: 59-45378 (1984-03-01), None
patent: 62113976 (1987-05-01), None
patent: 1-190235 (1989-07-01), None
patent: 11-82763 (1999-03-01), None
patent: 2000-10602 (2000-01-01), None
patent: 2002-295705 (2002-10-01), None
Waterhammer, “A Complex Phenomenon with a Simple Solution”, online search at Omega.com, Technical Reference Selection Guide.
International Search Report (PCT/JP03/16287), completed Mar. 2, 2004.
Dohi Kyousuke
Ikeda Nobukazu
Nagase Masaaki
Nishimura Ryutaro
Nishino Kouji
Fujikin Incorporated
Griffin & Szipl, P.C.
Krishnamurthy Ramesh
Ohmi Tadahiro
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