US 12,290,171 B2
Telescopic rail
Christoph Neuhaus, Niederelbert (DE); and Christian Satony, Urbar (DE)
Assigned to ACCURIDE INTERNATIONAL GMBH, Diez (DE)
Appl. No. 17/919,610
Filed by Accuride International GmbH, Diez (DE)
PCT Filed May 26, 2021, PCT No. PCT/EP2021/063953
§ 371(c)(1), (2) Date Oct. 18, 2022,
PCT Pub. No. WO2021/244907, PCT Pub. Date Dec. 9, 2021.
Claims priority of application No. 20178409 (EP), filed on Jun. 5, 2020.
Prior Publication US 2023/0337820 A1, Oct. 26, 2023
Int. Cl. A47B 88/493 (2017.01); A47B 88/457 (2017.01); A47B 88/46 (2017.01)
CPC A47B 88/493 (2017.01) [A47B 88/457 (2017.01); A47B 88/46 (2017.01)] 26 Claims
OG exemplary drawing
 
1. A telescopic rail (4) comprising
a first rail element (1),
a second rail element (2),
a third rail element (3), and
a drive device (13),
wherein the first rail element (1) and the second rail element (2) are mounted together such that the first rail element (1) and the second rail element (2) are linearly displaceable relative to one another in and counter to a pull-out direction (7);
wherein the third rail element (3) and the second rail element (2) are mounted together such that the third rail element (3) and the second rail element (2) are linearly displaceable relative to one another in and counter to the pull-out direction (7),
wherein the drive device (13) is mounted on the first rail element (1) or is mountable on a holding element connectable to the first rail element;
wherein the drive device (13) is configured such that, in an operation of the telescopic rail (4), the drive device (13) causes a linear movement of the second rail element (2) relative to the first rail element (1) in or counter to the pull-out direction (7),
characterised in that the telescopic rail (4) comprises a traction element (5),
wherein the traction element (5) is fixed to the first rail element (1) and to the third rail element (3);
wherein the traction element (5) is guided on the second rail element (2) in a direction parallel to the pull-out direction (7) such that a displacement movement of the second rail element (2) relative to the first rail element (1) leads to a displacement movement of the third rail element (3) relative to the second rail element (2); and
wherein the drive device (13) is a spindle drive (13) comprising a threaded spindle (19) which is rotatable relative to the first rail element (1) and is stationarily mounted in the pull-out direction (7) and an internal thread (38) which is fixed on the second rail element (1) in the pull-out direction (7).