Global Patent Index - EP 1017956 A1

EP 1017956 A1 2000-07-12 - IMPROVEMENTS IN BURNERS

Title (en)

IMPROVEMENTS IN BURNERS

Title (de)

VERBESSERUNGEN AN BRENNERN

Title (fr)

PERFECTIONNEMENT DE BRULEURS

Publication

EP 1017956 A1 (EN)

Application

EP 98932333 A

Priority

  • GB 9801932 W
  • GB 9713995 A

Abstract (en)

[origin: GB2341441A] A gas burner which can use a hydrocarbon fuel other than acetylene or methylacetylene as the fuel gas and air as the oxidant has means (18) for preheating the oxidant gas and means (14) for preheating the fuel gas which becomes cracked. These gases are delivered into a chamber (67) where they become mixed under highly turbulent conditions, and then pass through nozzle (86) and shroud (100) and form a flame (97) of high intensity and high turbulence. The flame typically produces more than 150 MW/metre<SP>3</SP>, e.g. 300-500 MW/metre<SP>3</SP> for lower temperature operations and at least 500 MW/metre<SP>3</SP> for welding or cutting steel. Its turbulence, indicated by its acoustic/thermal ratio, is typically about 6x10<SP>-6</SP> and enables air of the boundary layer which insulates the workpiece to be stripped off. In an alternative arrangement configured as a gas cutting torch, preheated air or other cutting gas is supplied to a jet adjacent the main flame. A gas torch or gas cutting torch according to the invention can be fuelled with propane or propylene which are inexpensive to store and use, but can achieve a performance comparable to that of an oxyacetylene torch.

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

F23D 14/38; F23D 14/62; F23D 14/54; F23D 14/66

IPC 8 full level (invention and additional information)

F23D 14/28 (2006.01); F23D 14/38 (2006.01); F23D 14/62 (2006.01); F23D 14/66 (2006.01)

CPC (invention and additional information)

F23D 14/62 (2013.01); F23D 14/28 (2013.01); F23D 14/38 (2013.01); F23D 14/66 (2013.01); F23L 2900/15042 (2013.01); Y02E 20/348 (2013.01)

Designated contracting state (EPC)

CH DE ES FR GB IE IT LI NL SE

EPO simple patent family

GB 2326934 A 19990106; GB 9713995 D0 19970910; AU 8227498 A 19990125; EP 1017956 A1 20000712; GB 2341441 A 20000315; GB 9930747 D0 20000216; WO 9901698 A1 19990114

INPADOC legal status


2002-09-04 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020201

2001-06-20 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION):

- Designated State(s): CH DE ES FR GB IE IT LI NL SE

2001-04-25 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010313

2000-07-12 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000201

2000-07-12 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): CH DE ES FR GB IE IT LI NL SE