EP 0995060 A1 20000426 - DUCKBILL VALVE
Title (en)
DUCKBILL VALVE
Title (de)
LIPPENVENTIL
Title (fr)
CLAPET EN BEC DE CANARD
Publication
Application
Priority
- EP 9804225 W 19980706
- US 89259497 A 19970715
- US 8132898 A 19980519
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
IPC 8 full level
F16K 15/14 (2006.01)
CPC (source: EP)
F16K 15/147 (2013.01)
Citation (search report)
See references of WO 9904187A1
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
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
DOCDB simple family (application)
EP 9804225 W 19980706; AU 8858698 A 19980706; BR 9811109 A 19980706; CA 2294914 A 19980706; CN 98807210 A 19980706; EP 98940173 A 19980706; ID 20000069 A 19980706; JP 2000503358 A 19980706