Patent ID: 9237806
Filing Date: 2016-01-19
CPC Classification: A47B

Claim Text:
1. A sliding track assembly, wherein the sliding track assembly includes a first rail, a second rail and a third rail each having an inner end and an outer end, the second rail is slidably mounted on and supported by the first rail, and the third rail is slidably mounted on and supported by the second rail, the sliding track assembly comprising: a latch member mounted on the third rail of the third rail, and having at least one resilient or compressible asymmetric portion, wherein the least one resilient or compressible asymmetric portion rises above a base of the latch member, extends between an inner side and an outer side of the base of the latch member, and has an inward facing slope arising from the inner side of the base of the latch member and an outward facing slope arising from the outer sides of the base of the latch member; and a lock member mounted or formed on the second rail at a position of the second rail; wherein the third rail has a positioning feature integrally formed on a floor of the third rail, the latch member has a base disposed parallel to the floor of the third rail with a positioning feature integrally formed thereon, and the positioning feature of the third rail and the positioning feature of the base of the latch member engage with one another to mount the latch member to the third rail, whereby the third rail moves together with the second rail when the latch member and the lock member are engaged, and the third rail moves freely by itself when the latch member and the lock member are disengaged, wherein the at least one resilient or compressible asymmetric portion can be compressed by the lock member in a direction perpendicular to the floor of the third rail such that the latch member may pass the lock member as the second and third rails move relatively so that as the second rail reaches a hard stop at its fully extended or retracted positions, the third rail can still be moved further to its fully extended or retracted positions.