EP 0365805 A3 19901205 - A DEVICE FOR THE CONTROL OF FLOW AND A HIGH PRESSURE PUMP
Title (en)
A DEVICE FOR THE CONTROL OF FLOW AND A HIGH PRESSURE PUMP
Publication
Application
Priority
DE 3836126 A 19881022
Abstract (en)
[origin: EP0365805A2] A fluid motor (97) is set into the return flow of a hydraulic or pneuma-machinery. This fluid motor (97) has a relatively large consumption capacity to revolve at low speed, but it can be a low pressure motor. The motor (97) is utilized to revolve or oscilate one or more control devices which may be used to control the operation of the machinery with the return flow whereinto the fluid motor (97) is set. Specific additional matters are then proposed to secure the smoothly timed and reliable operation of the fluid motor and of the controller(s) which it drives. This control arrangement with the fluid motor (97) in the return flow fluid line may be utilized to control the operation of a high pressure pump. This pump may have medial pressure (8, 9) and high pressure (5, 6) pistons, reciprocating in respective cylinders, as well as inner- and outer- chambers with deflectible separators (58) between these chambers in order that the outer chamber may contain a lubricatious fluid while the inner chamber can then contain a non-lubricative fluid, as for example, water. The fluid motor (97) in the return fluid line may be replaced by another motor, for example, an electric motor with a reduction gear, to enforce a low speed operation of the control device(s). If the apparatus of the invention is a complete use of all details of the invention, a pump can provide a flow of water with pressures in excess of 30 000 psi.
IPC 1-7
IPC 8 full level
F04B 43/067 (2006.01)
CPC (source: EP US)
F04B 43/067 (2013.01 - EP US)
Citation (search report)
- [E] DE 3806502 A1 19890921 - EICKMANN KARL [DE]
- [E] DE 3810415 A1 19891130 - EICKMANN KARL [DE]
- [E] DE 3811625 A1 19891026 - EICKMANN KARL [DE]
- [A] DE 3151764 A1 19820902 - OTT KG LEWA [DE]
- [A] DE 3535001 A1 19870409 - BREINLICH RICHARD DR [DE]
- [A] EP 0075618 A1 19830406 - HARBIDGE JOHN
- [A] US 3022738 A 19620227 - ARCHIE KRUTE EVERETT
- [AD] US 4373874 A 19830215 - PHILLIPS ALBERT [US]
Designated contracting state (EPC)
AT CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0365805 A2 19900502; EP 0365805 A3 19901205; DE 3934964 A1 19910508; DE 3935185 A1 19910523; DE 3935185 C2 19940929
DOCDB simple family (application)
EP 89116750 A 19890911; DE 3934964 A 19891020; DE 3935185 A 19891023