EP 0022851 B1 19830209 - TWIN-CYLINDER PUMP, IN PARTICULAR FOR PUMPING THICK LIQUIDS
Title (en)
TWIN-CYLINDER PUMP, IN PARTICULAR FOR PUMPING THICK LIQUIDS
Publication
Application
Priority
DE 2903749 A 19790201
Abstract (en)
[origin: WO8001594A1] The thick liquid pumps, in particular concrete pump comprise two cylinders leading to a chamber (1) and which suck alternately the product to be pumped from the chamber (1) and discharge the product into a discharge conduit through an S-shaped pipe (5) pivoting in the chamber (1). In order to achieve a sealing joint between a wear ring (20) supported by the pivoting pipe (5) and the backward wall (64) of the chamber (1) comprising the ports of the cylinders (2) and optionally reinforced by a pressure plate (22) and in order to ensure a uniform wearing on all the wearing ring surface (20), the bearing is arranged so that the pressure of the product to be pumped is converted into an axial force acting on the axially displaceable pivoting pipe (5). Hence, the bearing pressure of the wear ring (20) is increased. The wear ring (20) may rotate on the extremity of the pivoting pipe (5) which allows a very regular wearing of all the ring surface (20).
IPC 1-7
IPC 8 full level
F04B 7/00 (2006.01); F04B 7/02 (2006.01); F04B 15/02 (2006.01)
CPC (source: EP US)
F04B 7/0096 (2013.01 - EP US); Y10S 417/90 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB LU NL SE
DOCDB simple family (publication)
WO 8001594 A1 19800807; AT E2457 T1 19830315; DE 2903749 A1 19800814; DE 2903749 C2 19831110; DE 3061836 D1 19830317; EP 0022851 A1 19810128; EP 0022851 B1 19830209; ES 488121 A1 19800916; IT 1129587 B 19860611; IT 8019603 A0 19800131; JP S55501189 A 19801225; US 4382752 A 19830510
DOCDB simple family (application)
DE 8000011 W 19800131; AT 80900342 T 19800131; DE 2903749 A 19790201; DE 3061836 T 19800131; EP 80900342 A 19800815; ES 488121 A 19800131; IT 1960380 A 19800131; JP 50045980 A 19800131; US 20946580 A 19801001