Patent ID: 7882932

Claim:
A transmission ( 6 ) for a helicopter ( 1 ), the transmission ( 6 ) comprising: at least one movable member ( 7 ); a casing ( 8 ) housing said movable member ( 7 ); a lubricated support ( 9 ) for supporting said movable member ( 7 ) inside said casing ( 8 ) and for rotation about an axis (A); a feed device ( 11 ) for feeding a lubricating fluid to said support ( 9 ); a storage device ( 25 ) permitting gradual release of said lubricating fluid, and is connected fluidically to said feed device ( 11 ) and to said support ( 9 ) to permit lubrication of said support ( 9 ) in the event of breakdown of said feed device ( 11 ); said storage device ( 25 ) being angularly integral with said movable member ( 7 ) and located radially inwards of said support ( 9 ) to feed said lubricating fluid centrifugally to said support ( 9 ); said storage device ( 25 ) being housed inside said movable member ( 7 ); said storage device ( 25 ) comprising a cylinder ( 50 ) for collecting said lubricating fluid supplied by said feed device ( 11 ) in normal operating conditions and a member ( 41 ) having passages for said lubricating fluid, cooperating radially with said cylinder ( 50 ) and connected fluidically to said support ( 9 ); a first chamber ( 30 ) through which said lubricating fluid flows in normal operating conditions and which is fed by said feed device ( 11 ), interposed radially between said member ( 41 ) with passages and said support ( 9 ), and in turn feeds the support ( 9 ); said member ( 41 ) being connected fluidically to said support ( 9 ) by said first chamber ( 30 ); a body ( 26 ) housed inside said movable member ( 7 ) and angularly integral with said movable member ( 7 ); said body ( 26 ) comprising: a second chamber ( 31 ) distinct and spaced from said cylinder ( 50 ) and fed, in use, with said lubricant fluid by said feed device ( 11 ); and a third chamber ( 33 ) housing said storage device ( 25 ); said second chamber ( 31 ) being fluidically connected to said first chamber ( 30 ) and to said cylinder ( 50 ); said body ( 26 ) comprising a number of holes ( 42 ) which connect said member ( 41 ) with said first chamber ( 30 ); said member ( 41 ) with passages comprising a portion made of porous material, the pores of which being sized to produce a predetermined resistance to the centrifugal flow of said lubricating fluid.