Patent ID: 7147255

Claim:
A single hung or double hung window assembly having a frame and comprising a latch reinforcing block and a tilt latch assembly, said block for engagement with a nose portion of the tilt latch assembly, said block having a top and bottom and having extending from proximate the top to proximate the bottom there-through fastening portions to fasten said reinforcing block to the frame of the window assembly and within a track of the window assembly proximate the bottom thereof, said reinforcing block having disposed proximate the top thereof at least one cutout, notch or pocket extending towards the bottom of the block and for receipt of the nose portion of the latch assembly to pass loads, such as wind loads, to the frame of the window assembly to which the reinforcing block is attached, the reinforcing block further comprising a counter balance spring mounting block for engagement with a counter balance spring of the single or double hung window assembly, said reinforcing block having means for engaging the counter balance spring and for fastening thereto, wherein the counter balance spring is mounted on or fastened to the reinforcing block fastened to a sash track allowing motion of the spring while the block is fixed into position relative to said track.