EP 0672221 B1 19960918 - METERING PUMP WITH VENT
Title (en)
METERING PUMP WITH VENT
Title (de)
DOSIERPUMPE MIT ENTLÜFTUNGSVENTIL
Title (fr)
POMPE DE DOSAGE COMPORTANT UNE SOUPAPE DE DEGAGEMENT D'AIR
Publication
Application
Priority
- DE 4241030 A 19921205
- EP 9303333 W 19931127
Abstract (en)
[origin: US5588809A] PCT No. PCT/EP93/03333 Sec. 371 Date Aug. 7, 1995 Sec. 102(e) Date Aug. 7, 1995 PCT Filed Nov. 27, 1993 PCT Pub. No. WO94/13956 PCT Pub. Date Jun. 23, 1994Metering pumps for the metered feed of liquids are fitted with an intake valve built into an intake line from an intake container, a pump chamber downstream of it with a pumping component altering its displacement volume, a pressure valve leading to the metering connector and a vent and by-pass valve built into a return line leading to the intake container. In order to keep the quality of by-passed metering liquid as small as possible while maintaining adequate venting, there is valve chamber between the pressure valve and the pump chamber and separated from the latter by a return valve and a movable control wall, in which is incorporated the vent controlled by the control wall, opening on the suction stroke of the pumping component and closing on its delivery stroke. .There is also preferably in the valve chamber a prestressed displacement wall altering the volume of the valve chamber in the opposite direction to that of the control wall.
IPC 1-7
IPC 8 full level
F04B 13/00 (2006.01); F04B 53/06 (2006.01)
CPC (source: EP US)
F04B 53/06 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FR IT LI NL SE
DOCDB simple family (publication)
US 5588809 A 19961231; AT E143101 T1 19961015; CA 2151030 A1 19940623; DE 4241030 C1 19940601; DE 59303903 D1 19961024; DK 0672221 T3 19970317; EP 0672221 A1 19950920; EP 0672221 B1 19960918; ES 2091686 T3 19961101; WO 9413956 A1 19940623
DOCDB simple family (application)
US 44851695 A 19950807; AT 94901899 T 19931127; CA 2151030 A 19931127; DE 4241030 A 19921205; DE 59303903 T 19931127; DK 94901899 T 19931127; EP 9303333 W 19931127; EP 94901899 A 19931127; ES 94901899 T 19931127