Patent ID: 8739481

Claim:
A window or door system having a hidden rail structure comprising: a substructure ( 100 ) to be open at a top and installed in a two or more parallel line arrangement where a window/door frame is to be installed, comprising: a shielding plate ( 102 ) installed at a bottom side of the substructure ( 100 ), and rail holding parts ( 104 ) formed in a single body with two inside walls of the substructure ( 100 ), above the shielding plate ( 102 ) in a direction of the length of the substructure ( 100 ); a rail structure ( 200 ) to be detachably secured on the rail holding parts ( 104 ) of the substructure ( 100 ); a rail covering structure ( 300 ) having a flat shaped structure, to prevent the detachable rail structure ( 200 ) from being exposed or visible to the outside, comprising connection parts ( 302 ) formed in a single body with an under side of the rail covering structure ( 300 ), so that the connection parts ( 302 ) are connected within a connection element ( 202 ) of the detachable rail structure ( 200 ); and a window/door driving structure ( 500 ) comprising: a top plate ( 502 ) to be connected with a chassis frame ( 110 ) of a window/door by a fastening structure ( 400 ), an inside plate ( 504 ) and an outside plate ( 506 ) downwardly extending from the inside and outside ends of the top plate ( 502 ), respectively, an inside roller supporting plate ( 508 ) and an outside roller supporting plate ( 510 ) respectively inwardly and outwardly extending from the lower ends of the inside plate ( 504 ) and outside plate ( 506 ), and rollers ( 512 ) positioned at bottoms of the inside and outside roller supporting plates ( 508 , 510 ) and secured to roll along rails ( 206 ) of the rail structure ( 200 ), wherein the detachable rail structure ( 200 ) comprises: securing parts ( 204 ) formed in a single body with the inside and outside ends of the rail structure ( 200 ), so that the securing parts ( 204 ) are secured to the rail holding parts ( 104 ) of the substructure ( 100 ), wherein the connection element ( 202 ) protrudes at a central part of the rail structure ( 200 ), so that the connection parts ( 302 ) of the rail covering structure ( 300 ) are inserted in the connection element ( 202 ), and wherein the rails ( 206 ) are respectively positioned between one of the securing parts ( 204 ) and the connection element ( 202 ) and between the other of the securing parts ( 204 ) and the connection element ( 202 ).