# US 10,499,738 B2 · Slide rail assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,499,738 B2 - Document ID: US10499738B2 - Status: Granted - Kind: B2 - Application number: 15/996,679 - Filed: 2018-06-04 - Published: 2019-07-04 - Granted: 2019-12-10 - Earliest claimed: 2017-12-28 - Assignees: King Slide Works Co., Ltd.; King Slide Technology Co., Ltd. - Applicants: King Slide Works Co., Ltd.; King Slide Technology Co., Ltd. - Inventors: Ken-Ching Chen; Shun-Ho Yang; Kai-Wen Yu; Chun-Chiang Wang - Web page: https://patentgrep.com/patent/US10499738B2 ## CPC - A47B 88/487: with rollers, ball bearings, wheels, or the like - A47B 88/443: Successive movement of rails within drawer slides, i.e. at least one rail element is not moving during the movement of other elements - A47B 88/45: Synchronisation of cooperating drawer slides, i.e. with a coordination of the rail movement of different drawer slides - A47B 88/477: Buffers; End stops - F16C 29/04: Ball or roller bearings - A47B 88/493: with rollers, ball bearings, wheels, or the like - A47B 2210/0059: Guide located at the side of the drawer - A47B 2210/0081: Telescopic drawer rails with stop blocks, e.g. synchronization buffers - A47B: TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE (furniture jointing F16B) - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS ## Abstract A slide rail assembly includes a first rail, a second rail, a mounting member, a third rail, a fourth rail and an engaging member. The mounting member includes a first part, a second part and a third part. The first part and the second part are connected to the third part and respectively extended along different directions. The third rail is connected to the first part of the mounting member, and the third rail is movable relative to the first rail. The fourth rail is connected to the second part of the mounting member, and the second rail is movable relative to the fourth rail. The engaging member is movably mounted to the mounting member. The engaging member is configured to allow the mounting member to be synchronously moved with the second rail along a predetermined direction. ## Claims ### Claim 1 A slide rail assembly, comprising: a first rail; a second rail; a mounting member comprising a first part, a second part and a third part, wherein the first part and the second part are connected to the third part and respectively extended along different directions; a third rail connected to the first part of the mounting member, wherein the third rail is movable relative to the first rail; a fourth rail connected to the second part of the mounting member, wherein the second rail is movable relative to the fourth rail; an engaging member movably mounted to the mounting member; and an elastic member configured to provide an elastic force to the engaging member; wherein when the second rail is moved from a retracted position to a first predetermined position along a first direction, the engaging member is engaged with the second rail in response to the elastic force of the elastic member, so as to allow the mounting member to be synchronously moved with the second rail along the first direction; wherein the fourth rail comprises a first wall, a second wall and a side wall connected between the first wall and the second wall of the fourth rail, the second rail comprises a first wall, a second wall and a side wall connected between the first wall and the second wall of the second rail, the engaging member is pivoted to the mounting member, one of the first wall and the second wall of the fourth rail has a notch, the notch is configured to allow an engaging part of the engaging member to insert therein, and one of the first wall and the second wall of the second rail has an abutting part; when the second rail is located at the first predetermined position, the engaging part of the engaging member contacts the abutting part, in order to allow the second rail to drive the mounting member to move along the first direction through the abutting part. ### Claim 2 (depends on 1) The slide rail assembly of claim 1, further comprising a working member arranged on the first rail, wherein when the second rail is moved from the first predetermined position to a second predetermined position along the first direction, the engaging member is moved by the working member to disengage the engaging part of the engaging member from the abutting part, such that the mounting member is no longer synchronously moved with the second rail. ### Claim 3 (depends on 2) The slide rail assembly of claim 2, wherein the first part and the second part are substantially perpendicularly connected to the third part. ### Claim 4 (depends on 3) The slide rail assembly of claim 3, wherein the mounting member has a first side and a second side, the third rail is connected to the first part of the mounting member and located at the first side of the mounting member, and the fourth rail is connected to the second part of the mounting member and located at the second side of the mounting member. ### Claim 5 (depends on 4) The slide rail assembly of claim 4, wherein the first side is opposite to the second side. ### Claim 6 (depends on 4) The slide rail assembly of claim 4, wherein the first rail comprises a first wall, a second wall and a side wall connected between the first wall and the second wall of the first rail, a first passage is defined by the first wall, the second wall and the side wall of the first rail, and the third rail is movable relative to the first rail through the first passage. ### Claim 7 (depends on 6) The slide rail assembly of claim 6, wherein the third rail comprises a first wall, a second wall and a side wall connected between the first wall and the second wall of the third rail, the side wall of the third rail is connected to the first part of the mounting member, and the first wall and the second wall of the third rail are located within the first passage. ### Claim 8 (depends on 7) The slide rail assembly of claim 7, further comprising a first slide assisting device movably mounted between the first rail and the third rail, wherein the first slide assisting device comprises a plurality of slide assisting members configured to be supported between the first wall of the first rail and the first wall of the third rail, and configured to be supported between the second wall of the first rail and the second wall of the third rail. ### Claim 9 (depends on 6) The slide rail assembly of claim 6, wherein the first wall of the first rail has a first section and a second section bent relative to the first section, and the second wall of the first rail has a third section and a fourth section bent relative to the third section. ### Claim 10 (depends on 8) The slide rail assembly of claim 8, wherein the side wall of the fourth rail is connected to the second part of the mounting member, a second passage is defined by the first wall, the second wall and the side wall of the fourth rail, and the second rail is movable relative to the fourth rail through the second passage. ### Claim 11 (depends on 10) The slide rail assembly of claim 10, wherein the first wall and the second wall of the second rail are located within the second passage. ### Claim 12 (depends on 11) The slide rail assembly of claim 11, further comprising a second slide assisting device movably mounted between the fourth rail and the second rail, wherein the second slide assisting device comprises a plurality of slide assisting members configured to be supported between the first wall of the second rail and the first wall of the fourth rail, and configured to be supported between the second wall of the second rail and the second wall of the fourth rail. ### Claim 13 (depends on 12) The slide rail assembly of claim 12, wherein one of the first wall and the second wall of the first rail has a positioning part; when the mounting member is moved to a third predetermined position along the first direction, the engaging member is engaged with the positioning part of the first rail in response to the elastic force of the elastic member, in order to prevent the mounting member from being moved relative to the first rail along the first direction or a second direction. ### Claim 14 (depends on 12) The slide rail assembly of claim 12, further comprising a buffer member arranged on the first rail, and a contact member arranged on the third rail, wherein when the mounting member is moved a predetermined distance along the first direction, the contact member contacts the buffer member for providing a buffer effect. ### Claim 15 (depends on 14) The slide rail assembly of claim 14, wherein a first blocking base is arranged adjacent to a front part of the first rail, the slide rail assembly further comprises a holding base, and the buffer member is mounted between the first blocking base and the holding base. ### Claim 16 (depends on 13) The slide rail assembly of claim 13, wherein a second blocking base is arranged adjacent to a front part of the fourth rail, and a blocking member is movably connected to the second rail; when the second rail is moved relative to the fourth rail along the first direction to an open position, the blocking member is configured to contact a blocking part of the second blocking base at a blocking position, in order to prevent the second rail from being further moved along the first direction, and an operating member is configured to be operated to move the blocking member to be no longer at the blocking position. ### Claim 17 (depends on 16) The slide rail assembly of claim 16, wherein when the second rail is moved from the open position to a predetermined retracted position along the second direction, the second rail is configured to drive the engaging member to move, to disengage the engaging member from the positioning part of the first rail. ### Claim 18 A slide rail assembly, comprising: a first rail; a second rail; a mounting member comprising a first part, a second part and a third part, wherein the first part and the second part are substantially perpendicularly connected to the third part and respectively extended along different directions; a third rail connected to the first part of the mounting member, wherein the third rail is movable relative to the first rail; a fourth rail connected to the second part of the mounting member, wherein the second rail is movable relative to the fourth rail; and an engaging member arranged on the mounting member, wherein the engaging member is configured to engage with the second rail, so as to allow the mounting member to be synchronously moved with the second rail along a first direction; wherein the fourth rail comprises a first wall, a second wall and a side wall connected between the first wall and the second wall of the fourth rail, the second rail comprises a first wall, a second wall and a side wall connected between the first wall and the second wall of the second rail, the engaging member is pivoted to the mounting member, one of the first wall and the second wall of the fourth rail has a notch, the notch is configured to allow an engaging part of the engaging member to insert therein, and one of the first wall and the second wall of the second rail has an abutting part; when the second rail is located at the first predetermined position, the engaging part of the engaging member contacts the abutting part, in order to allow the second rail to drive the mounting member to move along the first direction through the abutting part; wherein the slide rail assembly further comprises a working member arranged on the first rail; when the second rail is moved to a second predetermined position along the first direction, the engaging member is moved by the working member to disengage the engaging part of the engaging member from the abutting part, such that the mounting member is no longer synchronously moved with the second rail.