Patent ID: 8240089

Claim:
A carriage for sliding doors and windows; said doors and windows ( 2 ) comprising: a fixed frame ( 3 ), at least one sash ( 4 ) that slides relative to the, fixed frame ( 3 ) horizontally on at least one carriage ( 7 ) between an open position and a closed position, and a handle ( 9 ) mounted on the sash ( 4 ) and designed to control the carriage ( 7 ); the carriage ( 7 ) being provided with a supporting frame ( 11 ), mobile on wheels, and with a connecting member ( 13 ) interposed between the supporting frame ( 11 ) and a bottom sash ( 4 ) rail ( 8 ); the connecting member ( 13 ) being movably constrained to the supporting frame ( 11 ) to enable the sash ( 4 ) to be lifted and lowered relative to the supporting frame ( 11 ); the carriage ( 7 ) also comprising a drive system ( 25 ) whereby the handle ( 9 ) controls the lifting and lowering of the sash ( 4 ) relative to the supporting frame ( 11 ) of the carriage ( 7 ); the carriage ( 7 ) further comprising elastic means ( 44 ) interposed between the supporting frame ( 11 ) and the connecting member ( 13 ); wherein the elastic means ( 44 ) are in the form of a helical spring ( 44 ); wherein the connecting member ( 13 ) comprises an upper plate ( 14 ) coupled to the bottom rail ( 8 ) of the sash ( 4 ), and a bottom protrusion ( 16 ) extending from a middle portion of the plate ( 14 ) and movably constrained to a central portion of the supporting frame ( 11 ); the helical spring ( 44 ) being interposed between the protrusion ( 16 ) and the supporting frame ( 11 ); and wherein the protrusion ( 16 ) has a cylindrical hole ( 46 ) which accommodates one longitudinal end ( 45 ) of the spring ( 44 ); the supporting frame ( 11 ) comprising a pin ( 48 ) that fits into the other longitudinal end ( 47 ) of the spring ( 44 ).