(19)
(11) EP 1 574 764 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 A2)

(48) Corrigendum issued on:
21.12.2005 Bulletin 2005/51

(88) Date of publication A3:
05.10.2005 Bulletin 2005/40

(43) Date of publication:
14.09.2005 Bulletin 2005/37

(21) Application number: 05004730.7

(22) Date of filing: 03.03.2005
(51) International Patent Classification (IPC)7: F16K 1/38, F16K 1/52
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR LV MK YU

(30) Priority: 09.03.2004 US 796811

(71) Applicant: WOODWARD GOVERNOR COMPANY
Fort Collins, Colorado 80525 (US)

(72) Inventors:
  • Brinks, Barry T.
    Fort Collins Colorado 80521 (US)
  • Gessaman, Jeff A.
    Fort Collins Colorado 80521 (US)
  • Suelter, Barry
    Fort Collins Colorado 80525 (US)

(74) Representative: Hoeger, Stellrecht & Partner Patentanwälte 
Uhlandstrasse 14 c
70182 Stuttgart
70182 Stuttgart (DE)

   


(54) High recovery sonic gas valve


(57) A high recovery sonic gas valve design with the inlet flow entering transverse and orthogonal to the outlet flow is presented. The configuration cancels the effects of the inlet flow entering orthogonal to the axis of the nozzle and diffuser. The inlet passage is curved in a manner to let the flow enter along the centerline of the nozzle and diffuser. The nozzle is contoured and provides upstream flow impedance. The diffuser is contoured with the area gradient varying from a low positive value at the nozzle throat then to a maximum value and finally dropping off significantly to near zero prior to the nozzle exit. The diffuser is nearly cylindrical and may extend past the valve outlet flange and protrude into adjacent piping.