EP 0027654 A1 19810429 - Concrete pump with hydraulically relieved slide valve.
Title (en)
Concrete pump with hydraulically relieved slide valve.
Title (de)
Betonpumpe mit hydraulisch entlastetem Schieber.
Title (fr)
Pompe à béton avec un tiroir à soulagement hydraulique.
Publication
Application
Priority
DE 2942560 A 19791020
Abstract (en)
In order to connect the concrete slide valve through with low expenditure of force, the main control slide valve (11) has a central position (43, 44, 45) which is long relative to the travel of its actuating piston and in which the connections (23, 24) of the working cylinders (1) of the concrete delivery pistons are connected to the low pressure or tank connection (10) of the hydraulic circuit. <IMAGE>
Abstract (de)
Um den Betonschieber mit geringem Kraftaufwand durchzuschalten, weist der Hauptsteuerschieber (11) eine, relativ zum Weg seines Steuerkolbens, lange Mittelstellung (43,44,45) auf bei welchem die Anschlüsse (23,24) der Antriebszylinder (1) der Betonförderkolben mit dem Niederdruck bzw. dem Tankanschluß (10) des Hydrokreislaufes in Verbindung stehen.
IPC 1-7
IPC 8 full level
F04B 7/02 (2006.01); F04B 9/117 (2006.01)
CPC (source: EP)
F04B 7/0233 (2013.01); F04B 9/1178 (2013.01)
Citation (search report)
- DE 2447054 A1 19750417 - ITALIANA FORME ACCIAIO
- FR 2247628 A1 19750509 - ITALIANA FORME ACCIAIO COMPAGN [IT]
- CH 224724 A 19421215 - SULZER AG [CH]
- DE 2126446 A1 19721207
- DE 2411391 A1 19750918 - SCHEELE MASCHF W
Designated contracting state (EPC)
BE DE FR GB IT
DOCDB simple family (publication)
DOCDB simple family (application)
EP 80106348 A 19801018; DE 2942560 A 19791020