Impact resistant lock and tilt latch combination for a sliding sash window

A window fastener, for use on a sash window configured to at least slide with respect to a master window frame, said window fastener comprising:

• a sash lock assembly comprising a lock housing, a cam, and an arm, said arm being pivotable with respect to said lock housing;
• and said earn being pivotable with respect to said lock housing to occupy an extended locking position, and at least a first retracted unlock position;
• a latch assembly comprising:
• a latch housing, a biasing means, and a latch member, said latch member comprising a hole;
• said latch member being selectively interconnected with said sash lock assembly and thereby configured to occupy two positions comprising urn extended latch position and a retracted latch position;
• a fitting configured to be secured within a track of the master window frame;
• said fitting comprising a post configured to protrude upwardly a distance and configured to be selectively received within said hole in a slight clearance fit;
• wherein said post comprises a circular cross-sectional shape;
• wherein when the sash window is in a closed window position and said cam is at said extended locking position:
• said cam is engaged with a keeper on the master window frame to lock the sash window;
• a portion of said latch assembly is engaged within a track of the master window frame;
• and said post is received within said hole for said latch member to engage said fitting to secure the sash window against impact loading;
• wherein when said cam is moved into said first retracted unlock position, said cam is disengaged from the keeper to unlock the sash window to permit sliding away from the closed window position;
• and
• wherein when the sash window is moved at least said distance away from the closed window position into an open position, said latch member is moved away from said post and disengages from said fitting.

A window fastener, for use on a sash window configured to at least slide with respect to a master window frame, said window fastener comprising:

• a sash lock assembly comprising a lock housing, a cam, and an arm, said arm being pivotable with respect to said lock housing;
• and said cam being pivotable with respect to said lock housing to occupy an extended locking position, and at least a first retracted unlock position;
• a latch assembly comprising:
• a latch housing, a biasing means, and a latch member, said latch member comprising a hole;
• said latch member being selectively interconnected with said sash lock assembly and thereby configured to occupy two positions comprising an extended latch position and a retracted latch position;
• a fitting configured to be secured within a track of the master window frame:
• said fitting comprising a post configured to protrude upwardly a distance and configured to be selectively received within said hole in a slight clearance fit;
• wherein said post comprises a rectangular cross-sectional shape;
• wherein when the sash window is in a closed window position and said cam is at said extended locking position:
• said cam is engaged with a keeper on the master window frame to lock the sash window;
• a portion of said latch assembly is engaged within a track of the master window frame;
• and said post is received within said hole for said latch member to engage said fitting to secure the sash window against impact loading;
• wherein when said cam is moved into said first retracted unlock position, said cam is disengaged from the keeper to unlock the sash window to permit sliding away from the closed window position;
• and
• wherein when sash window is moved at least said distance way from the closed window position into an open position, said latch member is moved away from said post and disengages from said fitting.