Global Patent Index - EP 0991864 A1

EP 0991864 A1 2000-04-12 - PISTON PUMP FOR THICK MATTER

Title (en)

PISTON PUMP FOR THICK MATTER

Title (de)

KOLBENPUMPE FÜR DICKSTOFFE

Title (fr)

POMPE A PISTON POUR MATIERES CONSISTANTES

Publication

EP 0991864 A1 (DE)

Application

EP 98937452 A

Priority

  • DE 19727103 A
  • EP 9803403 W

Abstract (en)

[origin: DE19727103A1] The invention relates to a piston pump for thick matter such as concrete, sewage sludge, excavated tunnel material and similar. The inventive piston pump has at least one hydraulically operated pump cylinder (10, 12). The pump piston (30) of said pump cylinder (10, 12) is connected to the piston (38) of a hydraulic drive cylinder (26, 28) by a common piston rod (34). A water box (42) is situated between the pump cylinders (10, 12) and the drive cylinders (26, 28), the piston rod (34) passing through said water box (42) for cleaning purposes. Said water box (42) has an assembly opening (44) at the top end, said opening being accessible from above, and a closeable water outlet nozzle (66) located at the bottom end. The water box also has an assembly opening located at the bottom end for easier assembly. Said bottom-end assembly opening (54) can be closed in such a way that it is liquid-tight by means of a removable base plate (52).

IPC 1-7 (main, further and additional classification)

F04B 15/02

IPC 8 full level (invention and additional information)

F04B 15/02 (2006.01)

CPC (invention and additional information)

F04B 15/02 (2013.01); Y10S 417/90 (2013.01)

Citation (search report)

See references of WO 9900599A1

Designated contracting state (EPC)

DE ES FR GB IT

DOCDB simple family

DE 19727103 A1 19990107; EP 0991864 A1 20000412; EP 0991864 B1 20020403; ES 2173605 T3 20021016; US 6116865 A 20000912; WO 9900599 A1 19990107