EP 0314994 B1 19910717 - PUMP ARRANGEMENT WITH DOUBLE PUMP
Title (en)
PUMP ARRANGEMENT WITH DOUBLE PUMP
Publication
Application
Priority
DE 3737350 A 19871104
Abstract (en)
[origin: EP0314994A1] A pump arrangement (1) has two alternately conveying separate pumps (2, 3) and one axial piston motor (14). The piston rod (19) of the latter is divided into two sections (20, 21) each assigned to a separate pump (2, 3). Their spacing is variable by means of an adjusting device (22). Each section (20, 21) is connected to an actuating element (39, 40), each of which is assigned to one of the two limit position switch elements (37, 38) and actuates this at the end of each motor stroke. The axial piston motor (14) has two pistons (6, 11), each connected to a piston rod section (20, 21), which pistons are located in the area of an end surface (41, 42) of the piston displacement (15, 16) when the associated limit position switch element (37, 38) is actuated. If a minimum of two double pumps are used, a pump arrangement is created for two-component or multiple- component operation in which the component pumps are steplessly lift- adjustable, do not have to perform any dead travel and thereby work with low pulsation. <IMAGE>
IPC 1-7
IPC 8 full level
F04B 9/12 (2006.01); F04B 9/135 (2006.01); F04B 43/06 (2006.01); F04B 43/067 (2006.01); F04B 43/073 (2006.01); F04B 49/12 (2006.01)
CPC (source: EP US)
F04B 9/135 (2013.01 - EP US); F04B 43/067 (2013.01 - EP US); F04B 43/0736 (2013.01 - EP US); F04B 49/12 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE FR GB IT NL SE
DOCDB simple family (publication)
EP 0314994 A1 19890510; EP 0314994 B1 19910717; AT E65296 T1 19910815; DE 3737350 A1 19890524; DE 3737350 C2 19900329
DOCDB simple family (application)
EP 88117547 A 19881021; AT 88117547 T 19881021; DE 3737350 A 19871104