Global Patent Index - EP 1069312 A1

EP 1069312 A1 2001-01-17 - Method and device for the evalution of a hydraulic system

Title (en)

Method and device for the evalution of a hydraulic system

Title (de)

Verfahren und Vorrichtung zum Auswerten eines hydraulischen Systems

Title (fr)

Procédé et dispositif d'évaluation d'un système hydraulique

Publication

EP 1069312 A1 (EN)

Application

EP 00202417 A

Priority

NL 1012606 A

Abstract (en)

To evaluate the state of a hydraulic system, particularly a hydraulic aircraft system, one determines, with the system at rest and the pump (8) operating, at inlet (6), outlet (12) and leak outlet (18) of the pump temperature and pressure at those places with the pump operating as a pump with external leak outlet, while measuring the leak flow and operating the pump as a pump with internal leak return, and determines, using the known thermodynamic equations for these states, the pump efficiency and the system leak flow respectively. <IMAGE>

IPC 1-7 (main, further and additional classification)

F04B 51/00

IPC 8 full level (invention and additional information)

F04B 51/00 (2006.01)

CPC (invention and additional information)

F04B 51/00 (2013.01)

Citation (search report)

  • [Y] US 5628229 A 19970513 - KRONE JOHN J [US], et al
  • [A] FR 2372422 A1 19780623 - HOFFLINGER WERNER [DE]
  • [A] DE 2557044 A1 19770623 - HOEFFLINGER WERNER [DE]
  • [DY] WITT K.: "Thermodynamisches Messen in der Ölhydraulik", ÖLHYDRAULIK UND PNEUMATIK, vol. 20, no. 3 e.v., 1 September 1976 (1976-09-01) - 1 January 1978 (1978-01-01), Mainz, pages 20.603 - 22.36, XP002131924

Designated contracting state (EPC)

DE ES FR GB IT NL

EPO simple patent family

EP 1069312 A1 20010117; NL 1012606 C2 20010116

INPADOC legal status


2005-07-27 [18D] DEEMED TO BE WITHDRAWN

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2004-10-27 [17Q] FIRST EXAMINATION REPORT

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2001-01-24 [17P] REQUEST FOR EXAMINATION FILED

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2001-01-17 [AK] DESIGNATED CONTRACTING STATES:

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2001-01-17 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

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