Global patent index - EP 0995060 A1

EP 0995060 A1 2000-04-26 - DUCKBILL VALVE

Title (en)

DUCKBILL VALVE

Title (de)

LIPPENVENTIL

Title (fr)

CLAPET EN BEC DE CANARD

Publication

EP 0995060 A1 (EN)

Application

EP 98940173 A

Priority

  • EP 9804225 W
  • US 89259497 A
  • US 8132898 A

Abstract (en)

[origin: WO9904187A1] A duckbill valve is provided which includes a hollow cylindrical elastomeric body (2) with first (4) and second (6) ends. The first end (4) has walls (8) parabolically tapering to an elongate slit (10), the slit being surrounded by an upper and lower lip (12). The second end (6) has a non-uniformly round (e.g. oval) outer wall terminating in an open mouth. When inserted into a perfectly round apertured fitting, the non-uniformly round outer walled elastomeric body is bowed to form-fit the round configuration thereby forcing shut the lips and slit. Upon increased air pressure within the elastomeric body, the slit is forced open. In a further embodiment, the inner wall of the second end may be non-uniformly (e.g. oval) round. Insertion of a round tubular fitting within the non-round inner wall of the elastomeric body also achieves a bowed form-fit configuration which forces shut the lips and slit.

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

F16K 15/14

IPC 8 full level (invention and additional information)

F16K 15/14 (2006.01)

CPC (invention and additional information)

F16K 15/147 (2013.01)

Citation (search report)

See references of WO 9904187A1

Designated contracting state (EPC)

DE ES FR GB IT

EPO simple patent family

WO 9904187 A1 19990128; AU 728691 B2 20010118; AU 8858698 A 19990210; BR 9811109 A 20000718; CA 2294914 A1 19990128; CN 1264456 A 20000823; EP 0995060 A1 20000426; ID 24197 A 20000713; JP 2001510272 A 20010731

INPADOC legal status

2003-09-17 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20030304

2000-04-26 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19991214

2000-04-26 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE ES FR GB IT