Patent ID: 7553138
Filing Date: 2009-06-30
Classification: F01C,F04C

Abstract:
1. A rotary screw machine of volume type comprising: a body having a main axis X; two members further comprising: wherein an outer surface of the male member defines a male surface and an inner surface of the female member defines a female surface, said male and female surfaces being helical surfaces having respective axes Xm and Xf that are parallel and spaced apart by a length E, said male and female surfaces defining at least one working chamber by formation of linear contacts of said male and female surfaces and relative displacement of said male and female members, said male and female surfaces being further defined about said axes Xm and Xf, respectively, by a nominal profile in a cross section of the mechanism, said profile of the male surface defining a male profile having an order of symmetry Nm with respect to a center Om located on said male axis Xm, said profile of the female surface defining a female profile having an order of symmetry Nf with respect to a center Of located on said female axis Xf, said rotary screw machine further having a main synchronizing coupling comprising a crank like mechanism generating an eccentricity defined by said length E between said main axis X and one of the axes (Xm, Xf), in that a first one of said male member and said female member is hinged in said body and is able to rotate on itself about its fixed axis (Xm; Xf) according to a rotational motion, in that the crank like mechanism ( in that said crank like mechanism is connected to the other of said male member or said female member not hinged in said body to allow the axis (Xf; Xm) of said other of said male member or said female member to revolve about the fixed axis (Xm; Xf) of said first one of said male member and said female member according to an orbital revolution motion having said length E as a radius, and in that said rotary screw machine comprises a main synchronizer synchronizing said swiveling motion and said orbital revolution motion, one with respect to the other, so that said male and female mesh together.