Patent · US Active

Device with counter-rotating propellers having a propeller pitch altering means

US8834119B2 · kind B2 · utility

9Cited by

4References

5Claims

0Family size

Assignee

SNECMA · FR

Inventors

Wouter Balk · Weesp, NL
Francois Gallet · Paris, FR

Key dates

Filing date	Feb 25, 2010
Grant date	Sep 16, 2014
Priority date	—
Expiry date	Oct 8, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T50/60
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A device including a pair of counter rotating propellers with variable pitch which may be modified by an actuator located in a central cavity of the shafts. A system for transporting energy to the actuator includes a conduit passing into a static case in proximity to an epicycloidal gear train, and then control conduits leading to the actuator and crossing the planet carrier of an epicycloidal gear train. The junction is affected by a dynamic joint with a collector. This transport path avoids a high temperature turbine.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.