Patent ID: 9420892
Filing Date: 2016-08-23
CPC Classification: A47C,Y10T

Claim Text:
1. A seat box assembly, comprising: a main box including a front rail and a back rail separated by a pair of side rails to define an interior space; a back frame assembly extending vertically from said main box, said back frame assembly including a pair of side uprights and a middle upright, each of the uprights being affixed to an interior face of said back rail, each of the side uprights of said pair of side uprights extending upwards from a respective one of said pair of side rails of said main box to define an apex at an intersection of the side upright and said side rail; and a drop-in webbing assembly comprising: wherein said pair of side rails and said pair of side uprights cooperate to define a pair of rearward notches, one at each apex, each of said rearward notches including a first lead-in structure defined by the respective side upright of the respective apex and a second lead-in structure defined by the respective side rail of the respective apex; and wherein said protruding portions of said rearward spring rail are disposed in said pair of rearward notches.