Patent ID: 7681360

Claim:
A sash window assembly comprising: a window frame including a head member, a sill member and a pair of jamb members connected together into a rectangular configuration; an upper sash and a lower sash each 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; and wherein said upper sash is a fixed sash, and the sash window assembly further comprises a pair of attachment members disposed inside opposite lower corner portions of the upper sash fixedly securing the upper sash to the window frame, and each of the attachment members includes a generally rectangular body having one surface facing a respective one of the jamb members, a retaining portion retaining a part of the upper sash, a through-hole extending from a side of said body opposite to the retaining portion to the one surface of the body, and an attachment screw received in the through-hole and threaded into the respective one of the jamb members, each said through-hole being partially disposed within said upper sash and extending diagonally with respect to longitudinal axis of said respective one of the jamb members.