Motion-activated stop for a vent window

A motion-activated stop for a vent window comprising a window frame and a vent disposed in the window frame and moveable toward an opened position in response to an opening force being applied to the vent, the motion-activated stop comprising:

• a connector configured to attach to the vent;
• a link comprising a first end and a second end, wherein the first end is pivotally coupled to the connector;
• a track configured to attach to the window frame, the track extending along a longitudinal direction and comprising:
• a recessed portion comprising a first wall and a second wall, the first wall being opposite the second wall and the second wall comprising a plurality of steps;
• a shoe assembly received in the recessed portion of the track and configured to be movable along the track in a first direction when the vent is moved toward the opened position, the shoe assembly comprising:
• a body extending along the longitudinal direction from a first body end to a second body end;
• a biasing member comprising a proximal end engaging the body and a distal end engaging the first wall of the recessed portion, wherein the biasing member applies a first force to the body at a first location to create a first torque acting on the body, the first torque having a first rotational direction;
• and
• a retaining pin coupled to the body and spaced from the first location along the longitudinal direction, wherein the second end of the link is pivotally coupled to the retaining pin;
• wherein, when the opening force is applied the vent, the link is configured to transfer a second force to the retaining pin to create a second torque acting on the body, the second torque having a second rotational direction that is opposed to the first rotational direction;
• and
• wherein, when the opening force applied the vent exceeds a predetermined value such that the second torque is greater than the first torque, the body of the shoe assembly rotates in the second rotational direction from an unlocked position to a locked position and the shoe assembly is prevented from moving along the track in the first direction.