EP 0969212 A3 20000405 - Back pressure check valve
Title (en)
Back pressure check valve
Title (de)
Vorspann-Rückschlagventil
Title (fr)
Valve anti-retour de précontrainte
Publication
Application
Priority
DE 19829232 A 19980630
Abstract (en)
[origin: EP0969212A2] The pilot piston (40) is movable via a pilot pressure connection (14) and raises the stop component (30) from its seat (20). On the pilot piston an intermediate piston is provided, effecting a pressure drop at a cross-section narrowed formation (22) and movable with the force of at least one screw spring (50) relatively to the pilot piston. The cross-section narrowed formation is arranged in the conduit between the stop component and the second connection (12). The intermediate piston is fitted inside the pilot piston.
IPC 1-7
IPC 8 full level
F15B 13/01 (2006.01)
CPC (source: EP)
F15B 13/01 (2013.01)
Citation (search report)
- [A] US 3857404 A 19741231 - JOHNSON H
- [A] US 3272086 A 19660913 - SOETERS RAYMOND A
- [A] US 2991759 A 19610711 - PILCH JOHN S
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0969212 A2 20000105; EP 0969212 A3 20000405; DE 19829232 C1 20000518
DOCDB simple family (application)
EP 99110208 A 19990526; DE 19829232 A 19980630