Global Patent Index - EP 1847710 A1

EP 1847710 A1 20071024 - Improved open circuit oleodynamic system to actuate and control a concrete piston pump

Title (en)

Improved open circuit oleodynamic system to actuate and control a concrete piston pump

Title (de)

Hydrodynamisches System mit offenem Kreislauf für eine Kolbenbetonpumpe.

Title (fr)

Systeme à circuit ouvert de distribution oleodynamique pour une pompe à béton.

Publication

EP 1847710 A1 20071024 (EN)

Application

EP 06425273 A 20060420

Priority

EP 06425273 A 20060420

Abstract (en)

An actuating oleodynamic system for pumps pumping viscous material, and in particular concrete, of the open-circuit and high-pressure type supplied by one or more hydraulic pumps, with direct, automatic-sequence driving system for the actuation of the hydraulic cylinders which displace the pistons in the liners of said pump and of the cylinders of a deviation valve through which said liners are alternately put in communication with a loading hopper and with a supply pipe. The system comprises a hydraulic valve assembly to control the displacement direction of said pistons, consisting of two hydraulic distributors, each actuated by a 5-way electrovalve to invert said direction between a pumping function and an intake function. The hydraulic circuit driving the hydraulic cylinders of the pump is symmetrical with respect to a plane transversal to the centreline of the two cylinders arranged side by side, in correspondence of which the hydraulic supply assembly is also arranged, resulting in a simple and quick switching of the supply from "shaft side" to "piston side" and viceversa.

IPC 8 full level

F04B 9/117 (2006.01); F04B 7/02 (2006.01); F04B 15/02 (2006.01)

CPC (source: EP)

F04B 7/0233 (2013.01); F04B 7/0241 (2013.01); F04B 9/1172 (2013.01); F04B 9/1178 (2013.01); F04B 15/023 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA HR MK YU

DOCDB simple family (publication)

EP 1847710 A1 20071024; EP 1847710 B1 20090617; AT E434130 T1 20090715; DE 602006007318 D1 20090730; DK 1847710 T3 20090907; ES 2329714 T3 20091130

DOCDB simple family (application)

EP 06425273 A 20060420; AT 06425273 T 20060420; DE 602006007318 T 20060420; DK 06425273 T 20060420; ES 06425273 T 20060420