Patent ID: 7431356

Claim:
A vent stop for use with a first sash member and a second sash member, wherein said first sash member slides with respect to said second sash member, wherein the vent stop comprises: a housing adapted to be disposed in a recess in said second sash member, said housing formed by a face plate, a front wall, a rear wall, and first and second sidewalls, said front and rear walls and said sidewalls extend from said face plate to thereby define a housing cavity; a tumbler that is pivotally mounted in said housing cavity, said tumbler including an apex which protrudes from said housing cavity when said tumbler is rotated from a retracted position to an extended position; said tumbler further including a recessed portion for receiving an end of a spring which biases the tumbler toward the extended position, where said tumbler is adapted to overlie an edge of said first sash member to prevent movement of said first sash member relative to said second sash member; a release member that is pivotally mounted in said housing cavity and has a first position which confines said tumbler within said housing cavity when said tumbler is in said retracted position, and a second position which allows said tumbler to rotate out from said housing cavity; said release member having a generally U-shaped head a first base end and a second base end, said base ends extend from said release member pivot point such that said release member is generally “T”-shaped, and wherein said release member includes first and second pins to pivotally mount said release member in said housing cavity; and a button disposed in said housing cavity but having a face exposed through an opening in said face plate of said housing so it is accessible when said housing is disposed in said recess; said button contacting said release member and when pressed, causes said release member to pivot to the second position where said release member no longer restrains said tumbler, and said spring-loaded tumbler rotates to said extended position.