Window tilt latch

An interlock device for retaining a window sash in place between a pair of mutually opposed jamb liners with which opposite sides of the sash are slidably engaged, comprising:

• a latch member having a body with a protruding jamb-engagement portion and a mounting portion spaced from said jamb-engagement portion;
• said body having a size and shape to be operably mounted upon said sash in a position generally orthogonal with respect to and generally adjacent to at least one of said opposed jamb liners, and said mounting portion defining a pivot mount by which said jamb-engagement portion may be pivoted toward and away from said one generally adjacent jamb liner;
• said protruding jamb-engagement portion having a size and shape to interfit with and retentively index behind a surface portion of said jamb liner when pivoted toward it, to thereby prevent unintended movement of the sash laterally away from the jamb liner in the vicinity of the interlock device;
• said pivot mount providing for pivotal movement of said jamb-engagement portion away from said jamb liner to free said sash for disengagement from said jamb liner and thereby enable angular tilting movement of the sash with respect to said jamb liner;
• and wherein:
• said hook element has a curved surface shaped to hook around a portion of said jamb liner.

An interlock device for retaining a window sash in place between a pair of mutually opposed jamb liners with which opposite sides of the sash are slidably engaged, comprising:

• a latch member having a body with a protruding jamb-engagement portion and a mounting portion spaced from said jamb-engagement potion;
• said body having a size and shape to be operably mounted upon said sash in a position generally orthogonal with respect to and generally adjacent to at least one of said opposed jamb liners, and said mounting portion defining a pivot mount by which said jamb-engagement portion may be pivoted toward and away from said one generally adjacent jamb liner;
• said protruding jamb-engagement potion having a size and shape to interfit with and retentively index behind a surface portion of said jamb liner when pivoted toward it, to thereby prevent unintended movement of the sash laterally away from the jamb liner in the vicinity of the interlock device;
• said pivot mount providing for pivotal movement of said jamb-engagement portion away from said jamb liner to free said sash for disengagement from said jamb liner and thereby enable angular tilting movement of the sash with respect to said jamb liner;
• a housing which encloses at least portions of said latch member;
• a resilient biasing element operably disposed between said housing and said latch member to urge the latch member toward said jamb liner.

A window assembly including a window sash and an interlock device for retaining the window sash in place between a pair of mutually opposed jamb liners with which opposite sides of the sash are slidably engaged, said window assembly comprising:

• a latch member having a body with a protruding jamb-engagement portion and a mounting portion spaced from said jamb-engagement portion;
• a housing which encloses portions of said latch member including said mounting portion thereof, at least said jamb-engagement portion of said latch member projecting out of said housing;
• and
• a pivot mount structure for at least one of said latch member and housing, whereby at least said latch member is pivotally movable in a plane;
• and wherein:
• said window sash defines first and second opposed vertical side faces and at least a portion of said jamb-engaging portion of said latch member is positionable in a laterally offset position outside said first side face when engaging said jamb.

A window assembly including a window sash and an interlock device for retaining the window sash in place between a pair of mutually opposed jamb liners with which opposite sides of the sash are slidably engaged, said window assembly comprising:

• a latch member having a body with a protruding jamb-engagement portion and a mounting portion spaced from said jamb-engagement portion;
• a housing which encloses portions of said latch member including said mounting portion thereof, at least said jamb-engagement portion of said latch member projecting out of said housing;
• a pivot mount structure for at least one of said latch member and housing, whereby at least said latch member is pivotally movable in a plane;
• a resilient biasing member disposed within said housing and acting on said latch member to urge it in one direction of its pivotal movement;
• and wherein:
• said window sash defines first and second opposed vertical side faces and at least a portion of said jamb-engaging portion of said latch member is positionable in a laterally offset position outside said first side face when engaging said jamb.