Global Patent Index - EP 2971726 A4

EP 2971726 A4 20161116 - THRUST EFFICIENT TURBOFAN ENGINE

Title (en)

THRUST EFFICIENT TURBOFAN ENGINE

Title (de)

TURBOLÜFTERTRIEBWERK MIT EFFIZIENTEM SCHUB

Title (fr)

MOTEUR À DOUBLE FLUX À POUSSÉE EFFICACE

Publication

EP 2971726 A4 20161116 (EN)

Application

EP 14807688 A 20140314

Priority

  • US 201361787321 P 20130315
  • US 201313854225 A 20130401
  • US 201361884327 P 20130930
  • US 2014027105 W 20140314

Abstract (en)

[origin: WO2014197075A2] A disclosed turbofan engine includes a gas generator section for generating a gas stream flow. A speed reduction device is driven by the power turbine. A propulsor section includes a fan driven by the power turbine through the speed reduction device at a second speed lower than the first speed for generating propulsive thrust as a mass flow rate of air through a bypass flow path. The fan includes a tip diameter greater than about fifty (50) inches and an Engine Unit Thrust Parameter ("EUTP") defined as net engine thrust divided by a product of the mass flow rate of air through the bypass flow path, a tip diameter of the fan and the first rotational speed of the power turbine is less than about 0.30 at a take-off condition.

IPC 8 full level

F02C 7/36 (2006.01); F02K 3/06 (2006.01)

CPC (source: EP)

F02C 7/36 (2013.01); F02K 3/06 (2013.01); F05D 2260/40311 (2013.01)

Citation (search report)

  • [XI] US 2011289900 A1 20111201 - STERN ALFRED M [US]
  • [X] US 2012171018 A1 20120705 - HASEL KARL L [US], et al
  • [I] MARK H WATERS ET AL: "NASA TECHNICAL MEMORANDUM ANALYSIS OF TURBOFAN PROPULSION SYSTEM WEIGHT AND DIMENSIGNS", 1 January 1977 (1977-01-01), XP055309222, Retrieved from the Internet <URL:http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19770012125.pdf> [retrieved on 20161010]
  • [A] DENÓS R ET AL: "GEARED FAN", AERO-ENGINE DESIGN: FROM STATE-OF-THE-ART TURBOFANS TOWARDS INNOVATIVE ARCHITECTURES - HARDCOVER. LECTURES SERIES 2008-03,, 3 March 2008 (2008-03-03), pages 1 - 26, XP003035510
  • [A] D P EDKINS ET AL: "NASA CR-120914 TF34 TURBOFAN QUIET ENGINE STUDY FINAL REPORT", 1 January 1972 (1972-01-01), XP055309404, Retrieved from the Internet <URL:http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19720026093.pdf> [retrieved on 20161011]
  • See references of WO 2014197075A2

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

WO 2014197075 A2 20141211; WO 2014197075 A3 20150305; EP 2971726 A2 20160120; EP 2971726 A4 20161116

DOCDB simple family (application)

US 2014027105 W 20140314; EP 14807688 A 20140314