Global Patent Index - EP 1152818 A4

EP 1152818 A4 20050914 - VOLUMETRIC GAS MIXING DEVICE

Title (en)

VOLUMETRIC GAS MIXING DEVICE

Title (de)

VOLUMETRISCHES GASMISCHGERÄT

Title (fr)

DISPOSITIF VOLUMETRIQUE DE MELANGEAGE DE GAZ

Publication

EP 1152818 A4 20050914 (EN)

Application

EP 99968408 A 19991223

Priority

  • AU PP793498 A 19981224
  • AU PQ257399 A 19990901
  • IB 9902113 W 19991223

Abstract (en)

[origin: WO0038497A2] A gas mixing apparatus including a plurality of selected volume gas chambers (20, 22; 66, 67, 68), a pressure regulated gas supply line (15, 16) to each chamber, a valve (40, 41; 69, 70, 71) in the supply line, an outlet line (42, 43; 88, 89, 90) of each chamber to a mixed gas reservoir (46, 73), and an outlet valve (47, 48; 69, 70, 71) in each outlet line. Each outlet line may also include a variable orifice throttle valve (85, 86, 87), enabling proportional mixing during the whole cycle of emptying the chamber. The selected volume gas chambers (66, 67, 68) may have variable volumes and may be cylinders (25, 31) with pistons (24, 30; 66a, 67a, 68a) moveable to change the selected volumes of the chambers. The inlet and outlet valves to the chambers may be a single three-way valve (69, 70, 71) having three gas lines extending therefrom, with one being the pressure regulated gas supply line, a second being a combination of inlet line and outlet line, and a third being a line to the mixed gas reservoir. A baffle (81) in the mixed gas reservoir (46, 73) is useful in mixing the gases upon entry.

IPC 1-7

B01F 1/00; F17C 5/06; F17C 7/00; G05D 11/16

IPC 8 full level

F17D 1/02 (2006.01); B01F 3/02 (2006.01); B01F 15/04 (2006.01); F17C 5/06 (2006.01); F17C 7/00 (2006.01); G05D 11/16 (2006.01)

CPC (source: EP)

B01F 3/026 (2013.01); F17C 5/06 (2013.01); F17C 7/00 (2013.01); F17C 2201/0109 (2013.01); F17C 2201/0119 (2013.01); F17C 2205/0146 (2013.01); F17C 2205/0326 (2013.01); F17C 2205/0332 (2013.01); F17C 2205/0335 (2013.01); F17C 2205/0338 (2013.01); F17C 2227/0142 (2013.01); F17C 2250/032 (2013.01); F17C 2250/0426 (2013.01); F17C 2250/043 (2013.01); F17C 2250/0626 (2013.01); F17C 2250/0636 (2013.01); F17C 2265/025 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

WO 0038497 A2 20000706; WO 0038497 A3 20001019; CA 2353979 A1 20000706; EP 1152818 A2 20011114; EP 1152818 A4 20050914; JP 2002533202 A 20021008; KR 20010099895 A 20011109

DOCDB simple family (application)

IB 9902113 W 19991223; CA 2353979 A 19991223; EP 99968408 A 19991223; JP 2000590463 A 19991223; KR 20017007955 A 20010622