Fluid handling – Pressure modulating relays or followers – With counter-balancing pressure feedback to the modulating...
Reexamination Certificate
2007-06-26
2007-06-26
Krishnamurthy, Ramesh (Department: 3753)
Fluid handling
Pressure modulating relays or followers
With counter-balancing pressure feedback to the modulating...
C137S489000, C251S030010, C251S333000
Reexamination Certificate
active
10859028
ABSTRACT:
An electro-pneumatic air pressure regulator includes a primary pressure introduction port, a secondary pressure output port, a pilot pressure chamber, a main valve for opening and closing a communicating conduit, a floating piston which actuates the main valve, a nozzle conduit via which the pilot pressure chamber is communicatively connected to the atmosphere, a flapper which includes a leaf spring facing an open end of the nozzle conduit, and an electromagnetic drive system which deforms the leaf spring to vary a position of the flapper relative to the open end of the nozzle conduit in accordance with the magnitude of an analogue input signal. The flapper includes a conical projection which projects toward the open end of the nozzle conduit. A conical recess corresponding to the conical projection is formed on an end face of the nozzle conduit around the open end thereof.
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European Search Report No. 04 01 2797 dated Jul. 8, 2005.
Aoki Toshikazu
Chinda Hiroshi
Fujita Tomomasa
Hayashi Akihiro
Kainuma Masakuni
Fujikura Rubber Ltd.
Krishnamurthy Ramesh
McCormick Paulding & Huber LLP
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