EP 0048342 A3 19831123 - PROCESS AND APPARATUS TO SUPPLY A PRESSURE FLUID WHICH IS PUMPED WITH A VARIABLE PRESSURE
Title (en)
PROCESS AND APPARATUS TO SUPPLY A PRESSURE FLUID WHICH IS PUMPED WITH A VARIABLE PRESSURE
Publication
Application
Priority
CH 692480 A 19800916
Abstract (en)
[origin: EP0048342A2] 1. A method for supplying a pressurized medium, preferably an injection medium, to at least one consumer site, preferably an injection site, at a pressure not exceeding a reference value, comprising moving the pressurized medium at varying pressure by means of a regulatable pump device, and generating measuring value signals from the momentarily prevailing pressure of the pressurized medium, characterized by the fact that the maximum pressure value arisen within a predetermined time interval is determined from the measuring value signals within said interval, that an actual value is derived from that pressure value and a comparison value derived from at least one maximum value for a preceding time interval which has been determined in the above mentioned manner, and that regulation signals for the pump device are generated by virtue of a comparison of the actual values and a reference value.
IPC 1-7
E21B 47/00; G05D 16/20; F04B 49/00; E21B 33/138; E21B 47/06; E21D 11/38
IPC 8 full level
E21B 33/138 (2006.01); E21B 47/00 (2012.01); E21B 47/06 (2012.01); E21D 9/00 (2006.01); E21D 11/38 (2006.01); F04B 49/00 (2006.01); F04B 49/06 (2006.01); G05D 16/20 (2006.01)
CPC (source: EP US)
E21B 33/138 (2013.01 - EP); E21B 47/00 (2013.01 - EP US); E21B 47/06 (2013.01 - EP); E21D 9/001 (2013.01 - EP); F04B 49/06 (2013.01 - EP)
Citation (search report)
- [AD] FR 2307124 A1 19761105 - CAVALLIN CHRISTER [SE]
- [A] FR 2084885 A5 19711217 - ATLAS COPCO AB
- [A] US 4161782 A 19790717 - MCCRACKEN OLIVER W [US]
- [A] GB 1449852 A 19760915 - COPPEN J D
- [A] US 3665945 A 19720530 - OTTENSTEIN SIDNEY ALLAN
Designated contracting state (EPC)
AT DE FR GB IT SE
DOCDB simple family (publication)
EP 0048342 A2 19820331; EP 0048342 A3 19831123; EP 0048342 B1 19851030; AT E16301 T1 19851115; CH 648423 A5 19850315; DE 3172773 D1 19851205
DOCDB simple family (application)
EP 81106473 A 19810820; AT 81106473 T 19810820; CH 692480 A 19800916; DE 3172773 T 19810820