# US 8,739,481 B2 · Hidden rail type window and door system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,739,481 B2 - Document ID: US8739481B2 - Status: Granted - Kind: B2 - Application number: 13/983,060 - Filed: 2011-08-24 - Published: 2013-12-26 - Granted: 2014-06-03 - Earliest claimed: 2011-03-17 - Applicants: Soon Seok Kim - Inventors: Soon Seok Kim - Web page: https://patentgrep.com/patent/US8739481B2 ## CPC - E06B 3/4609: {for windows (E06B3/4654 - E06B3/4681 take precedence)} - E05D 15/0686: {Tracks (E05D15/0665 - E05D15/0682 and E05D15/0691 take precedence)} - E05D 15/08: consisting of two or more independent parts movable each in its own guides - E06B 3/08: Constructions depending on the use of specified materials (E06B3/24 takes precedence) - E06B 3/26347: {specially adapted for sliding doors or windows} - E06B 3/4636: {for doors (E06B3/4609 and E06B3/4654 - E06B3/4681 take precedence; sliding shower doors A47K3/34)} - E06B 7/22: by means of elastic edgings, e.g. elastic rubber tubes; by means of resilient edgings, e.g. felt or plush strips, resilient metal strips (E06B7/18 takes precedence) - E05Y 2900/132: Doors - E05Y 2900/148: Windows - E06B 3/26303: {with thin strips, e.g. defining a hollow space between the metal section members} - E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00) - E05D: HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS (pivotal connections in general F16C11/00) - E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF ## Abstract There is provided a window/door system having a hidden rail structure wherein a rail structure is detachably installed at a substructure, the substructure installed where a window/door is to be installed, thereby making it very easy to replace and to maintain/repair the rail. In addition, the rail is hidden so as not to be visible to the outside when a window/door is opened/closed. That is, the present invention is to provide a window/door system having a hidden rail structure, wherein the rail structure is detachably installed at a substructure positioned where a window/door frame is to be installed, thereby making it very easy to replace and to maintain/repair the rail. Since the window/door system having a hidden rail structure according to the present invention also hides the rail so as not to be visible to the outside when a window/door is opened/closed by a sliding motion and the top of the hidden rail structure is processed so as to be flat, it not only provides a neat appearance but also makes it easy to clean. Furthermore, it has a new structure of improving air tightness against any draft and/or noise by a multileveled shielding structure. ## Claims ### Claim 1 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). ### Claim 2 (depends on 1) The window or door system having a hidden rail structure according to claim 1, wherein the fastening structure (400) to connect and fasten the chassis frame (110) of the window/door and the window/door driving structure (500) comprises: a horizontal assembling plate (402) to be assembled at a bottom of the chassis frame (110) of the window/door; and a vertical fastening plate (404) formed in a single body on an under surface of the horizontal assembling plate (402), to be inserted into an opening (514) formed on the top plate (502) of the window/door driving structure (500). ### Claim 3 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) to prevent the detachable rail structure (200) from being exposed or visible to the outside, comprising: a horizontal plate (304) having a sliding hole (306) being lengthwise cut and formed at a central part of the horizontal plate (304); and a vertical plate (308) formed in a single body at the inside and outside ends of the horizontal plate (304), to be secured to 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, a bottom plate (520) formed in a single body with the lower ends of the inside plate (504) and outside plate (506), a roller supporting rod (516) in a straight line shape formed in a single body at a central position on an under surface of the bottom plate (520), and rollers (512) mounted under a roller supporting plate (518) formed in a single body at a lower end of the roller supporting rod (516), so that the rollers (512) are secured to roll along the rails (206) of the detachable rail structure (200), wherein the detachable rail structure (200) has a flat shaped structure and comprises securing projections (208) protruding on the inside and outside ends of the rail structure (200), to secure the rail covering structure (300), and wherein the rail covering structure (300) comprises securing supporting parts (310) formed in a single body at both lower ends of the vertical plate (308), to be secured at the securing projections (208) of the detachable rail structure (200). ### Claim 4 (depends on 3) The window or door system having a hidden rail structure according to claim 3, wherein the rail covering structure (300) comprises airtight packing units (312) positioned on the rail covering structure (300) and secured to an outside surface of the roller supporting rod (516). ### Claim 5 (depends on 3) The window or door system having a hidden rail structure according to claim 3, wherein the fastening structure (400) connecting and fastening the chassis frame (110) of the window/door and the top plate (502) of the window/door driving structure (500) comprises: press-fitting elements (430) to be press-fit into the top plate (502) of the window/door driving structure (500), and binding ends (120) formed in a single body at under surfaces of the chassis frame (110), to be partially inserted into tops of the press-fitting elements (430).