US 4,283,885 A · Emergency release closure

Abstract

A safety release closure suitable for use in a mass transit vehicle which can be rapidly and efficiently removed either inwardly or outwardly in case of an emergency. The closure includes a removable sash that is mounted within a frame opening and secured in place by means of inside and outside deformable seals disposed between the frame and the inside and outside margins of the sash. The perimeter walls of the opening that face the sash are contoured so that the opening is wider across both edges than it is along the middepth region whereby the sash can be easily removed in both directions without it becoming wedged or otherwise jammed in the frame. Means for stripping the seals on both sides of the sash are provided for as are handle means which enable a person to pull the sash out of the frame after the seal has been removed.

Claims12

Dependent claims

A safety release closure that is capable of opening toward either the interior or the exterior of a vehicle to provide an emergency exit from the vehicle, the closure including

a mounting frame having at least one opening for receiving a window sash therein, the inside surface of said opening having a raised center section extending about the middepth of the opening and bevelled walls sloping downwardly and outwardly from the raised section towards the interior and exterior edges of said opening whereby the opening is wider across it two edges than across its middepth region,
a sash generally complimenting the opening in the frame which is centered within said opening,
a first deformable margin seal positioned about the interior edge perimeter of the sash and a second deformable margin seal positioned about the exterior edge perimeter of the sash with the seals being disposed in biasing contact between the sash and the frame to support said sash within said frame,
first pull means attached to said first deformable margin seal and a second pull means secured to said second deformable margin seal that are independently engagable to enable the seal associated to be pulled from between the frame and the sash thereby allowing the sash to be removed from the frame.

1 more element

Dependencies are inferred from the claim text.

Emergency release closure

Life of this patent

Emergency release closure

Life of this patent

Abstract

Claims12