Patent ID: 8336930
Filing Date: 2012-12-25
Classification: E05B,E05C,Y10S,Y10T

Abstract:
1. A window latch securable to a window sash that provides a locking function to at least one sliding sash, said latch comprising: a handle, said handle comprising a stem and a manually graspable portion, said manually graspable portion having a cavity formed therein, said handle having a top surface and a pair of side surfaces extending from said top surface, said surfaces forming said cavity in said handle, said cavity extending from at least said stem of said handle to an area of said handle opposite from said stem, said cavity having a sliding member disposed therein, said sliding member being adapted to move within said cavity between an engaged position and a disengaged position, said sliding member being biased toward said engaged position; a housing, said housing comprising an orifice, said housing further comprising a raised portion around at least a portion of said orifice, said handle stem mounting in said orifice, said raised portion having at least one recess for receiving at least a portion of said sliding member when in said engaged position, said sliding member engaging said recess serving to signal whether said latch is in a locked or an unlocked position, said sliding member engaging said housing recess in a direction transverse to said mounting of said stem, said engaged sliding member providing resistance to forced unlocking of said latch; a first cam and a delay cam; said delay cam being fixed to said stem; said first cam being adapted for movement relative to said stem, said relative movement selectively comprising pivotal movement and sliding movement; and wherein when said latch is in said unlocked position, rotation of said handle causes said delay cam to rotate and cause rotation of said first cam from said unlocked position to a position where at least a portion of said first cam protrudes out from said housing, said protruding portion of said first cam comprising an arcuate groove; and wherein further rotation of said shaft causes said delay cam to cause sliding movement of said first cam into a locked position in which a recess in said first cam engages a housing protrusion.