Patent ID: 8191313

Claim:
A sash window comprising: a window frame including a head member, a sill member and a pair of jamb members connected together into a rectangular configuration; and at least one sash having a sash frame including a top rail, a bottom rail and a pair of side rails connected together into a rectangular configuration, and a panel member disposed within the sash frame, said at least one sash being supported within the window frame and slidably movable along the jamb members between a fully closed position and a fully open position, wherein said at least one sash comprises a support device disposed on a lower end portion thereof and including a pivot shaft pivotally supporting said at least one sash relative to the window frame, and a latch device disposed on an upper end portion of said at least one sash and releasably engageable with each of the jamb members to lock said at least one sash in position against pivotal movement relative to the window frame, and wherein a vertical track of each of said jamb members has a first portion adapted for engagement with a latch bolt of the latch device when said at least one sash is in the fully closed position, and a first reinforcement member is disposed within said vertical track of each jamb member adjacent the first portion and indirectly reinforces said first portion from inside the jamb member such that the latch bolt directly engages an outer surface of the first portion and the first reinforcement member engages an inner surface of the first portion, the inner surface being opposite and spaced apart from the outer surface, and wherein the outer surface of the first portion directly engaged by the latch bolt is substantially perpendicular to a direction of pivot about the pivot shaft.