Patent ID: 8002317
Filing Date: 2011-08-23
Classification: E05B,E05C,Y10T

Abstract:
1. A window lock for securing a first frame member of a window to a keeper structure attached to a second frame member of the window and thereby preventing a relative adjustment of the first and second window frame members in a first direction of motion, the lock comprising: a housing configured to be secured to the first window frame member and defining an internal space; a latch member slidably mounted in the internal space of the housing and configured to be slidably adjusted in alternate rearward and forward directions between a retracted position and an extended position, the latch member in the extended position configured to extend in the forward direction from the housing to engage the keeper structure, and the latch member in the retracted position configured to retract in the rearward direction at least partially into the housing to disengage the keeper structure; a rotatable handle defining a shaft and a grip portion, the shaft extending through the housing and configured to actuate the latch member, and the grip portion defining an end distal to the shaft, wherein the handle is rotatably adjustable about an axis generally defined by the shaft between a locked position and an unlocked position; a rotatable disk mounted in the internal space of the housing and connected to the shaft of the handle and the latch member, wherein the disk is configured to rotate with the shaft and the handle about the axis generally defined by the shaft of the handle, wherein the disk is also configured to adjust such that when the end of the grip portion is rotated in the rearward direction the latch member from the extended position to the retracted position when the end of the grip portion of the handle is rotated, and wherein the handle extends in the rearward direction to indicate that the latch member is retracted; and a retention mechanism configured to automatically retain the latch member in the retracted position such that the first and second window frame members can be relatively adjusted until the first and second window frame members are relatively adjusted to a closed configuration; wherein the retention mechanism comprises: a rocker arm defining an axis perpendicular to the handle shaft and a hook portion, the rocker arm being configured to rotate about the axis perpendicular to the handle between an engaged position and a disengaged position, the hook portion in the engaged position being engaged with the disk to prevent the disk from rotating and thereby holds the latch member in the retracted position, and the hook portion in the disengaged position being disengaged from the disk so that the disk is configured to rotate; and a trigger member configured to rotate between an extended position and a retracted position, the trigger member in the extended position extending from the housing and the trigger member in the retracted position being retracted at least partially into the housing such that the trigger member is configured to contact the keeper structure and be adjusted to the retracted position by the keeper structure when the window frame members are relatively adjusted to a closed configuration and the lock is thereby adjusted to a position proximate the keeper structure, the trigger member being configured to engage the rocker arm to adjust the rocker arm to the disengaged position when the trigger member is adjusted to the retracted position.