Multifunctional window

A multifunctional window comprising a frame profile member (63) fixedly mounted circumferentially in a wall opening that is adapted to receive an opening sash arrangement (62) that is connected therein with hinges (113) allowing rotation thereof by an angle of 180° and provided with a tilting mechanism, said sash arrangement (62) houses a window comprising a pair of superimposing lower and upper window sashes (64) and (65) respectively, each of the vertically extending sides of said sashes (64, 65) being provided with a pair of laterally extending shafts (49) proximally to the edges thereof, said shafts (49) of said upper window sash (65) being introduced within holes (116) of an elongated insert guide profile member (19) mounted onto said sash arrangement (62) thereby maintaining said upper window sash (65) stationary, said shafts (49) being laterally displaceable to allow removal of said upper sash (65) if a requirement arises, whilst each of said shafts (49) of said lower window sash (64) is provided with a roller wheel (50) that is adapted to move within a predetermined channel comprising consecutively arranged grooves provided in said insert guide profile member (19) and in diverter insert guide members (66, 68);

• said sash arrangement (62) being provided with a cavity (3) adapted to receive a rubber sealant (4) and a cavity (2) adapted to house a lifting mechanism (46) of said lower window sash (64) that is adapted to be diverted and lifted upwardly with the roller wheels thereof moving within said predetermined channel so as to alternately raise said lower window sash (64) to an opened position superimposing said stationary upper sash (65) and a closure position of alignment with said stationary upper sash (65), a locking device (91) being adapted to automatically lock said lower sash (64) with said upper sash (65) when an alignment is reached, to achieve a water proof and air tight fitting of said lower and upper sashes (64, 65) when they are brought in alignment and abut said rubber sealant (4) provided within said cavity (3) of said sash arrangement (62) and further through abutment onto said rubber sealants (4) provided onto a profile member (88) that is snapped onto a bottom side of said upper sash (65) along a plane of abutment of said lower sash (64) when aligned with said upper sash (65), said lifting mechanism (46) comprises a hoist with rollers (47) and a spring (109) acting so as to provide reduction of the effort required for raising said lower sash (64), said mechanism being housed within a housing (112) that is H-shaped in cross-section, a nut (82) being provided proximally to a bottom of said housing (112), a regulatory screw (84) with an interiorly threaded hole (85) being adapted to receive a retaining screw (86), said retaining screw (86) passing through a hole (123) of a retaining member (107) and firmly screwed into the interiorly threaded hole (85) of the regulatory screw (84), a plastic washer (87) being provided in between said retaining screw (86) and the retaining member (107), said washer (87) providing for a reduction of friction so as to maintain the retaining member (107) stationary without the spring (109) being forced to rotate during rotation of said regulatory screw (84), wherein rotation of said regulatory screw (84) results in adjustment of a pretension of said spring (109) to adjust a force required for lifting and lowering said lower sash (64).