Patent ID: 7367162

Claim:
A system supporting a sash that is laterally removable from between opposed window jambs, the system comprising: a. a pair of sash support arms mounted to hang freely downward on respective opposite stiles of the sash and to pivot from downwardly hanging positions to outwardly extended positions that the support arms assume when supporting the sash; b. the sash support arms in the downwardly hanging positions being disposed so that as the sash is lowered toward a supported position, the downwardly hanging arms engage sash supporting platforms of counterbalanced sash shoes locked into the jambs so that sash lowering engagement between the arms and the platforms pivots the arms outward along the platforms toward the outwardly extended positions; and c. the shoes including locking elements deployable to lock the shoes to jamb projections during removal and replacement of the sash from the window jambs, the locking elements also being deployable to engage pins extending from the support arms so as to lock the sash support arms on the shoes when not deployed to lock the shoes to said jamb projections.