Window sash latch
AssigneeVision Industries Group, Inc.
InventorLuke Liang
Life of this patent
Estimating the term…
Abstract
An improved window sash latch which has a locking mechanism and a keeper is provided with a handle that rotates from a “locked” to an “unlocked” position. An inner cavity of the handle has a spring assembly having a sliding part that can be forced into a detent as the handle slides around a cylindrical extension of an outer surface of the latch. The detents correspond to a “locked” and an “unlocked” position of the latch. The latch also provides two cams where both cams revolve relative to each other; one cam is activated by the handle through the handle's shaft, the other cam engages the keeper, and both cams engage each other.
Claims18
A window latch securable to a window sash that provides a locking function to at least one sliding sash, comprising:
- a handle with a manually graspable portion and with a cavity formed therein said cavity having a sliding member that is adapted to move from an engaged position to a disengaged position;
- a housing that has a raised portion extending above a top surface of said housing, said raised portion having at least one recess for receiving at least a portion of said sliding member, and wherein when said sliding member is in an engaged position in said recess, said recess provides a detent to signal to a user whether the latch is in a locked or unlocked position.
A window latch securable to a window sash that provides a locking function to at least one sliding sash, comprising:
- a housing having an orifice thereon,
- a handle with a manually graspable portion, said handle having a shaft extending from said handle through said orifice in said housing, said handle being adapted to move from at least a first position to a second position;
- said shaft being secured to a locking mechanism, said locking mechanism comprising a first cam secured to said shaft, and a second cam said second cam having an orifice, said shaft passing through said orifice, said second cam being in contact with said first cam, and
- wherein when said locking mechanism is in an unlocked position, said first cam is adapted to rotate from a first position to a second position while rotating said second cam and said first cam being adapted to rotate from said second position to a third position without driving said second cam, and
- wherein when said locking mechanism is in a locked position said first cam is adapted to rotate from a first position to a second position without rotating said second cam, said first cam being adapted to drive said second cam from a first position to a second position when said first cam is rotated from said second position to a third position.
10 The latch according to claim 9 wherein said pin does not engage said second cam when said first cam rotates from said second position to said third position.
The latch according to claim 10 wherein when said locking mechanism is in a locked position said pin is adapted to travel in said groove without engaging said second cam when said first cam rotates from a first position to a second position and said pin engages said second cam when said first cam moves from said second position to said third position.
Dependencies are inferred from the claim text.