Patent ID: 8220846

Claim:
A latch, for use in a frame of a tiltable single-hung or double-hung sash window to permit sliding of the sash by at least a tongue of said latch tracking against a side jamb of a master window frame, and to also permit releasable engagement of said tongue of said latch with the side jamb, where said engagement secures the sash against inadvertent sash tilting by said latch resisting twist-out effect when the window and latch experience high wind loading resulting in deformation, said latch comprising: (a) a latch bolt; said latch bolt comprising: a housing, said housing comprising a top plate, a bottom wall, and first and second side walls, said first and second sidewalls extending from at least a portion of a bottom surface of said top plate, said bottom wall connecting to at least a portion of said first and second side walls, said top plate, said bottom wall, and said first and second side walls forming a cavity, a first end of said housing having an opening into said cavity; and a tongue, said tongue extending from a second end of said housing and having a front bearing face extending between a top surface and a bottom surface, said front bearing face comprising a groove being oriented generally in a vertical direction with said groove comprising a groove face being angled with respect to said front bearing face, said groove further comprising first and second lateral faces extending between said groove face and said front bearing face of said tongue; (b) a fixed member, said fixed member being slidably disposed within said cavity of said latch bolt housing, wherein at least a portion of said fixed member protrudes out from said first opening in said latch bolt housing; and (c) a spring, said spring biasing said latch bolt relative to said fixed member.