Abstract: A lever mechanism system includes push arms pivotably coupled to a vent sash and drive arms pivotably coupled to the push arms. The system includes gears coupled to the drive arms and a locking gear slide coupled with a locking mechanism of the sash. The system includes a handle that rotates approximately 180 degrees in a first direction to pivot the gear slide to move the locking mechanism of the sash to an unlocked position and rotates the gears to extend the drive arms and the push arms such that the sash is pushed to an open position. The handle radially rotates approximately 180 degrees in a second direction to rotate the gears to retract the drive arms and the push arms such that the sash is pulled to a closed position and pivots the gear slide to move the locking mechanism of the sash to a locked position.

Abstract: A pump handle system includes a pump handle and a main shaft. The pump handle is operable to radially pivot from a starting position in a first pivot direction and back to the starting position in a second pivot direction opposite the first pivot direction. The main shaft is driven by the pump handle to rotate approximately a first half of a predetermined rotational distance in a first rotational direction a first time the pump handle is pivoted out from the starting position in the first pivot direction, and rotate approximately a second half of the predetermined rotational distance in the first rotational direction a first time the pump handle is pivoted back to the starting position in the second pivot direction. The main shaft rotates in a second rotational direction opposite the first rotational direction a second time the pump handle is pivoted in the two-movement push-pull motion.

Abstract: Certain embodiments provide systems and methods for providing a window wall with flush slab edge covers. A window wall system can include a sill receptor configured to fixably attach to a top surface of a slab. The window wall system may include a head receptor configured to fixably attach to an underside surface of the slab. The window wall system can include a window wall panel including panel infill and a panel sill configured to detachably couple to the sill receptor. The window wall system may include a slab edge cover including cover infill. The slab edge cover can be configured to detachably couple to the window wall panel and the head receptor. In various embodiments, an exterior surface of the panel infill and an exterior surface of the cover infill are configured to flushly align when the slab edge cover is detachably coupled to the window wall panel.

Abstract: Certain embodiments provide systems and methods for providing a window wall with flush slab edge covers. A window wall system can include a sill receptor configured to fixably attach to a top surface of a slab. The window wall system may include a head receptor configured to fixably attach to an underside surface of the slab. The window wall system can include a window wall panel including panel infill and a panel sill configured to detachably couple to the sill receptor. The window wall system may include a slab edge cover including cover infill. The slab edge cover can be configured to detachably couple to the window wall panel and the head receptor. In various embodiments, an exterior surface of the panel infill and an exterior surface of the cover infill are configured to flushly align when the slab edge cover is detachably coupled to the window wall panel.

Abstract: Certain embodiments provide systems and methods for providing a window wall with flush slab edge covers. A window wall system can include a sill receptor configured to fixably attach to a top surface of a slab. The window wall system may include a head receptor configured to fixably attach to an underside surface of the slab. The window wall system can include a window wall panel including panel infill and a panel sill configured to detachably couple to the sill receptor. The window wall system may include a slab edge cover including cover infill. The slab edge cover can be configured to detachably couple to the window wall panel and the head receptor. In various embodiments, an exterior surface of the panel infill and an exterior surface of the cover infill are configured to flushly align when the slab edge cover is detachably coupled to the window wall panel.

Abstract: Certain embodiments provide systems and methods for unlocking, opening, closing and locking a vent sash. The system may include a base configured to attach to one or more of a vent stop and a window frame. The system may include a lever pivotably or slidably attached to the base. The lever may be configured to pivotably attach to a locking mechanism interface of the vent sash. The lever may be configured to pivot substantially ninety degrees in a first direction to an unlocked position. The lever may be configured to pivot substantially ninety degrees in a second direction to an opened position. The lever may be configured to pivot substantially ninety degrees in a third direction to a closed position. The lever may be configured to pivot substantially ninety degrees in a fourth direction to a locked position.