Global patent index - EP 0764823 B1

EP 0764823 B1 2000-08-16 - Heat exchanger tube with counter flow channels

Title (en)

Heat exchanger tube with counter flow channels

Title (de)

Wärmetauscherrohr mit Gegenstromkanälen

Title (fr)

Tube d'échangeur de chaleur à canaux de circulation à contre-courant

Publication

EP 0764823 B1 (FR)

Application

EP 96114637 A

Priority

FR 9511046 A

Abstract (en)

[origin: EP0764823A1] The tube (10) is made from sheet metal cut out and rolled to form two parallel channels (12, 14) which allow a fluid to circulate in two opposite directions. The channels are made by turning in the two edges of the sheet metal to make a partition (26, 28) between them. They are connected at one end (30) to a fluid chamber divided into two compartments, and at the other end (32) they are closed separately by folds (36) in the metal sheet. The fluid flow from one channel to the other has two or more apertures (38, 40, 42) in the partition which are rectangular in shape. The tube has one main flat face (16), two semi-circular edges (18, 20), and a second flat face formed by the two in-turned edges (22, 24) of the metal sheet. Its upper edge has two pairs of opposite tabs (34) for attaching it to slots in the fluid chamber wall.

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

F28D 1/03

IPC 8 full level (invention and additional information)

F28F 1/02 (2006.01); F28D 1/03 (2006.01); F28F 9/18 (2006.01)

CPC (invention and additional information)

F28F 9/182 (2013.01); F28D 1/035 (2013.01); F28D 1/0391 (2013.01)

Designated contracting state (EPC)

DE ES GB IT

EPO simple patent family

EP 0764823 A1 19970326; EP 0764823 B1 20000816; DE 69609790 D1 20000921; FR 2738905 A1 19970321; FR 2738905 B1 19971205; JP H09170890 A 19970630; US 5762133 A 19980609

INPADOC legal status

2001-08-01 [26N] NO OPPOSITION FILED

- Ref Legal Event Code: 26N

2001-07-04 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

- Ref Legal Event Code: GBPC

- Effective date: 20001116

2000-11-17 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: DE

- Ref Legal Event Code: PG25

- Free Format Text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

- Effective date: 20001117

2000-11-16 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: GB

- Ref Legal Event Code: PG25

- Free Format Text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20001116

2000-09-21 [REF] CORRESPONDS TO:

- Ref Legal Event Code: REF

- Ref Document Number: 69609790

- Country of Ref Document: DE

- Date of Ref Document: 2000-09-21

2000-09-06 [GBT] GB: TRANSLATION OF EP PATENT FILED (GB SECTION 77(6)(A)/1977)

- Ref Legal Event Code: GBT

- Effective date: 20000816

2000-08-16 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE ES GB IT

2000-08-16 [PG25 ES] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: ES

- Ref Legal Event Code: PG25

- Free Format Text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

- Effective date: 20000816

2000-08-16 [PG25 IT] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: IT

- Ref Legal Event Code: PG25

- Free Format Text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

- Effective date: 20000816

1998-09-16 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 19980803

1997-10-15 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19970818

1997-03-26 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE ES GB IT