Global patent index - EP 1070231 A1

EP 1070231 A1 2001-01-24 - GAS METER INCORPORATING CALORIFIC MEASUREMENT

Title (en)

GAS METER INCORPORATING CALORIFIC MEASUREMENT

Title (de)

GASZÄHLER MIT EINER KALORISCHEN MESSUNG

Title (fr)

COMPTEUR A GAZ INCORPORANT UNE MESURE CALORIFIQUE

Publication

EP 1070231 A1 (EN)

Application

EP 99913009 A

Priority

  • AU 9900259 W
  • AU PP293098 A

Abstract (en)

[origin: WO9953273A1] A gas meter (10) determining the calorific value of the gas passing through the meter is disclosed. The meter includes a reaction chamber (28) that draws gas from the gas flow path and an air intake (30). The calorific value is determined using a resistor (36), coated with a catalyst material, that forms part of a wheatstone bridge circuit. Oxidation of the gas/air mixture on the surface of the resistor (36) causes a temperature and resistance change dependent on the calorific value of the gas that can be detected by the wheatstone bridge.

IPC 1-7 (main, further and additional classification)

G01F 1/66; G01F 1/69; G01N 25/30

IPC 8 full level (invention and additional information)

G01N 27/16 (2006.01); G01N 33/22 (2006.01)

CPC (invention and additional information)

G01N 33/225 (2013.01); G01N 27/16 (2013.01)

Designated contracting state (EPC)

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

EPO simple patent family

WO 9953273 A1 19991021; AU PP293098 D0 19980507; EP 1070231 A1 20010124; EP 1070231 A4 20020116; NZ 507220 A 20020828

INPADOC legal status

2004-05-12 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20031103

2002-01-16 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 20011205

2002-01-16 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2002-01-16 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- Free Format Text: 7G 01F 1/66 A, 7G 01F 1/69 B, 7G 01N 25/30 B, 7G 01N 33/22 B

2001-01-24 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20001017

2001-01-24 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE