Patent ID: 7731805

Claim:
A dishwasher comprising: a cabinet; a tub mounted within said cabinet, said tub defining a wash chamber; a rack support coupled to a side wall of said tub; and a lower rack supported by said rack support such that said lower rack is movable between a retracted position within said wash chamber and an extended position wherein said lower rack extends from said wash chamber, said lower rack is movable within a range between a lowered position and an elevated position with said lower rack extended from said wash chamber; wherein said rack support further comprises a frame and a linkage system that interconnects said frame to said side wall, said lower rack supported by said frame, said linkage system comprising: a first linkage assembly comprising a first front link and a first rear link; a second linkage assembly comprising a second front link and a second rear link, said first linkage assembly and said second linkage assembly positioned on opposite sides of said lower rack; and a stabilizing bar coupling said first rear link to said second rear link; and a lock-and-release mechanism configured to lock said frame in the elevated position and to release said frame from a locked condition, said lock-and-release mechanism comprising a stop link rotatable coupled to a corresponding side member of said frame, said stop link forming a stop tab and a locking tab, and at least one of said first front link and said second front link comprising a stud, said locking tab configured to engage said stud to lock said lower rack in the elevated position.