System for unlocking/locking and opening/closing windows

A lever mechanism system for a vent sash, the system comprising:

• a plurality of push arms, each of the plurality of push arms comprising a first push arm end and a second push arm end, and each of the plurality of push arms pivotably coupled to the vent sash at the second push arm end;
• a plurality of drive arms, each of the plurality of drive arms comprising a first drive arm end and a second drive arm end, each of the plurality of drive arms pivotably coupled at the second drive arm end to the first push arm end of a corresponding one of the plurality of push arms;
• a plurality of first gears, each of the plurality of first gears coupled to the first drive arm end of a corresponding one of the plurality of drive arms;
• a locking gear slide operable to interface with a locking mechanism of the vent sash;
• and
• a handle operable to:
• radially rotate approximately one hundred eighty degrees in a first direction in a single plane to:
• pivot the locking gear slide to move the locking mechanism of the vent sash to an unlocked position, and
• rotate the plurality of first gears to extend the plurality of drive arms and the plurality of push arms such that the vent sash is pushed to an open position, and
• radially rotate approximately one hundred eighty degrees in a second direction in the single plane to:
• rotate the plurality of first gears to retract the plurality of drive arms and the plurality of push arms such that the vent sash is pulled to a closed position, and
• pivot the locking gear slide to move the locking mechanism of the vent sash to a locked position.