# US 6,718,695 B1 · Railless 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 6,718,695 B1 - Document ID: US6718695B1 - Status: Granted - Kind: B1 - Application number: 10/089,757 - Filed: 2002-04-01 - Granted: 2004-04-13 - Earliest claimed: 1999-10-01 - Inventors: Ki-Young Park - Web page: https://patentgrep.com/patent/US6718695B1 ## CPC - E06B 3/4609: {for windows (E06B3/4654 - E06B3/4681 take precedence)} - E06B 3/4618: {the sliding wing being arranged beside a fixed wing (E06B3/4627 takes precedence)} - 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) ## Abstract The present invention relates to an improved lower member of a sliding window and door system, and it is an object of the present invention to provide a convenient, safe and high quality window and door system by solving problems of the conventional window and door system. To provide a flat structure of a railless window and door system of the present invention, a surface member is formed on a window (or door) frame lower member, and to provide a railless structure, a guide device is provided on the window (or door) frame lower member and the window (or door) lower member such that the window (or door) lower member is not inadvertently separated from the window (or door) frame lower member even when the roller is driven on the railless surface member as the window (or door) lower member is guided by the guide device. ## Claims ### Claim 1 A door or window system comprising: a frame including a frame lower member having a top surface, said top surface including a flat portion extending lengthwise of the frame lower member, a slidable panel mounted in the frame and including a panel lower member having first and second opposite faces, one of said first and second opposite faces being an inner face of the panel lower member and the other of said first and second opposite faces being an outer face of the panel lower member, a roller mounted on the panel lower member and engaging the flat portion of the top surface of the frame lower member, for supporting the panel lower member during sliding movement of the slidable panel, and a guide device comprising a first part provided on the frame lower member and a second part provided on the panel lower member, the guide device guiding sliding movement of the slidable panel along the frame lower member, and wherein the top surface of the frame lower member includes a portion that extends laterally beyond said first face of the panel lower member. ### Claim 2 (depends on 1) A door or window system according to claim 1, wherein the first part of the guide device includes a flange extending downwards from the top surface of the frame lower member, whereby the frame lower member defines a guide groove that extends lengthwise of the frame lower member and is open from below, and the second part of the guide device includes a guide member that is attached to the panel lower member and is received in the guide groove. ### Claim 3 (depends on 1) A door or window system according to claim 1, wherein the first part of the guide device includes a flange extending downwards from the top surface of the frame lower member, whereby the frame lower member defines a guide groove that extends lengthwise of the frame lower member, and the second part of the guide device includes a guide roller that is attached to the panel lower member and is received in the guide groove. ### Claim 4 (depends on 1) A door or window system according to claim 1, wherein the first part of the guide device includes a guide rail extending downwards from the top surface of the frame lower member, the second part of the guide device includes a lower extension portion extending from the panel lower member and including first and second portions defining a channel that extends lengthwise of the panel lower member and into which the guide rail extends. ### Claim 5 (depends on 4) A door or window system according to claim 4, wherein the first and second portions of the lower extension portion of the panel lower member are provided with grooves in confronting relationship with opposite respective sides of the rail, and the system further comprises sliding members that are received in the grooves respectively and engage the guide rail. ### Claim 6 (depends on 1) A door or window system according to claim 1, wherein the first part of the guide device includes a guide rail extending downwards from the top surface of the frame lower member, and the second part of the guide device includes a lower extension portion extending from the panel lower member and a guide roller that is attached to the lower extension portion of the panel lower member and is engaged by the guide rail. ### Claim 7 (depends on 6) A door or window system according to claim 6, wherein the guide roller has a peripheral groove and the guide rail engages the peripheral groove of the guide roller. ### Claim 8 (depends on 1) A door or window system according to claim 1, wherein the flat portion of the top surface of the frame lower member is a first portion of the top surface of the frame lower member, the top surface of the frame lower member has a second portion, alongside said first portion, said second portion of the top surface of the frame lower member is formed with a groove, and the system further comprises a fixed panel mounted in a first length portion of the groove and a groove cover mounted in a second length portion of the groove. ### Claim 9 (depends on 1) A door or window system according to claim 1, wherein the roller is removable from the panel lower member and is adjustable for adjusting the height of the panel lower member relative to the frame lower member. ### Claim 10 (depends on 1) A door or window system according to claim 1, wherein the portion of the top surface of the frame lower member that extends laterally beyond the first face of the panel lower member is sloped for directing water to flow away from the flat portion, and the system further comprises a means attached to the panel lower member at the first face thereof for resisting passage of air or water between the panel lower member and the frame lower member. ### Claim 11 (depends on 1) A door or window system according to claim 1, wherein the flat portion of the top surface of the frame lower member is a first portion of the top surface of the frame lower member, the top surface of the frame lower member has a second flat portion, alongside said first portion, and the system further comprises a second slidable panel mounted in the frame and a second roller mounted on the second slidable panel and engaging the second flat portion of the top surface of the frame lower member, for supporting the second slidable panel during sliding movement thereof. ### Claim 12 (depends on 1) A door or window system according to claim 1, wherein the first part of the guide device comprises a means defining a guide groove and the second part of the guide device comprises a guide roller mounted on a lower extension of the panel lower member. ### Claim 13 (depends on 1) A door or window system according to claim 1, wherein the first part of the guide device includes a flange portion that defines a channel that extends lengthwise of the frame lower member and is open downwards, and the second part of the guide device extends into said channel from below for guiding sliding movement of the slidable panel along the frame lower member. ### Claim 14 A door or window system comprising: a frame including an elongate frame lower member having an upper surface, the frame lower member including a flange portion that defines a channel that extends lengthwise of the frame lower member and is open downwards, a slidable panel mounted in the frame and including a panel lower member and a guide portion that extends into said channel from below for guiding sliding movement of the slidable panel along the frame lower member, said guide portion of the slidable panel including a guide roller that is attached to the panel lower member and is received in the channel, and a support roller mounted on the panel lower member and engaging the upper surface of the frame lower member, for supporting the panel lower member during sliding movement of the slidable panel. ### Claim 15 (depends on 14) A door or window system according to claim 14, wherein the guide portion of the slidable panel includes a lower extension portion extending from the panel lower member and the guide roller is attached to the lower extension portion of the panel lower member and is engaged by the flange portion of the frame lower member. ### Claim 16 (depends on 15) A door or window system according to claim 15, wherein the guide roller has a peripheral groove and the flange portion engages the peripheral groove of the guide roller. ### Claim 17 (depends on 14) A door or window system according to claim 14, wherein the upper surface of the frame lower member has a first portion that is engaged by the support roller mounted on the panel lower member and also has a second portion, alongside said first portion, said second portion of the upper surface of the frame lower member is formed with a groove, and the system further comprises a fixed panel mounted in a first length portion of the groove and a groove cover mounted in a second length portion of the groove. ### Claim 18 (depends on 14) A door or window system according to claim 14, wherein the support roller is removable from the panel lower member and is adjustable for adjusting the height of the panel lower member relative to the frame lower member. ### Claim 19 (depends on 14) A door or window system according to claim 14, wherein the upper surface of the frame lower member has a first portion that is engaged by the support roller mounted on the panel lower member and has a second portion that is sloped for directing water to flow away from the first portion, and the system further comprises a means attached to the panel lower member for resisting passage of air or water between the panel lower member and the frame lower member. ### Claim 20 (depends on 14) A door or window system according to claim 14, wherein the upper surface of the frame lower member has a first portion that is engaged by the support roller mounted on the panel lower member and has a second portion alongside said first portion, and the system further comprises a second slidable panel mounted in the frame and a second support roller mounted on the second slidable panel and engaging the second portion of the upper surface of the frame lower member, for supporting the second slidable panel during sliding movement thereof. ### Claim 21 A door or window system comprising: a frame including an elongate frame lower member having an upper surface, the frame lower member including a portion that defines a channel that extends lengthwise of the frame lower member and is closed from above, a slidable panel mounted in the frame and including a panel lower member and a guide portion that extends into said channel for guiding sliding movement of the slidable panel along the frame lower member, and a roller mounted on the panel lower member and engaging the upper surface of the frame lower member, for supporting the panel lower member during sliding movement of the slidable panel, and wherein the upper surface of the frame lower member has a first portion that is engaged by the roller mounted on the panel lower member and also has a second portion, alongside said first portion, said second portion of the upper surface of the frame lower member is formed with a groove, and the system further comprises a fixed panel mounted in a first length portion of the groove and a groove cover mounted in a second length portion of the groove. ### Claim 22 (depends on 21) A door or window system according to claim 21, wherein the frame lower member includes a guide rail extending downwards relative to the upper surface of the frame lower member, and the guide portion of the slidable panel includes an extension portion extending from the panel lower member and including first and second portions defining a channel that extends lengthwise of the panel lower member and into which the guide rail extends. ### Claim 23 (depends on 21) A door or window system according to claim 21, wherein the roller is removable from the panel lower member and is adjustable for adjusting the height of the panel lower member relative to the frame lower member. ### Claim 24 (depends on 21) A door or window system according to claim 21, wherein the upper surface of the frame lower member has a first portion that is engaged by the roller mounted on the panel lower member and has a second portion that is sloped for directing water to flow away from the first portion, and the system further comprises a means attached to the panel lower member for resisting passage of air or water between the panel lower member and the frame lower member. ### Claim 25 (depends on 21) A door or window system according to claim 21, wherein the upper surface of the frame lower member has a first portion that is engaged by the roller mounted on the panel lower member and has a second portion alongside said first portion, and the system further comprises a second slidable panel mounted in the frame and a second roller mounted on the second slidable panel and engaging the second portion of the upper surface of the frame lower member, for supporting the second slidable panel during sliding movement thereof.