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Current content: 157 117 910 patent documents

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139 301 new documents added

1 340 825 documents amended

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EP 0765448 A2 19970402 - CHECK VALVE

Title (en)

CHECK VALVE

Title (de)

RÜCKSCHLAGVENTIL

Title (fr)

SOUPAPE ANTIRETOUR

Publication

EP 0765448 A2 19970402 (DE)

Application

EP 95936983 A 19951127

Priority

DE 9501667 W 19951127
DE 4445650 A 19941221

Abstract (en)

[origin: DE4445650A1] To simplify the construction of a check valve, the invention proposes a valve closing component (12) integral with a curved washer (10). The valve closing component (12) takes the form of a ball cap at the centre of the curved washer (10). The curved washer has helical spring leaves (14).

IPC 1-7

F16K 15/02

IPC 8 full level

F16K 15/02 (2006.01); F16K 15/14 (2006.01)

CPC (source: EP KR)

F16K 15/02 (2013.01 - EP KR); F16K 15/144 (2013.01 - EP)

Citation (search report)

See references of WO 9619688A2

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

DE 4445650 A1 19960627; EP 0765448 A2 19970402; JP H09509728 A 19970930; KR 970701325 A 19970317; PL 316308 A1 19970106; WO 9619688 A2 19960627; WO 9619688 A3 19960829

DOCDB simple family (application)

DE 4445650 A 19941221; DE 9501667 W 19951127; EP 95936983 A 19951127; JP 51941096 A 19951127; KR 19960704572 A 19960821; PL 31630895 A 19951127