Patent ID: 9441410
Filing Date: 2016-09-13
CPC Classification: E05C,E06B

Claim Text:
1. An opening system for a building wall, comprising: a peripheral frame having opposite front and rear faces and defining an empty space bounded by said peripheral frame between opposite sides and between a top and a bottom of said peripheral frame and being open at said opposite front and rear faces of said peripheral frame; a mullion having opposite front and rear sides and opposite lateral sides, said mullion front side being disposed proximate to said peripheral frame front face and said mullion rear side being spaced forwardly from said peripheral frame rear face, said mullion extending upright, between, and interconnecting said top and bottom of said peripheral frame proximate said front face thereof, said mullion being spaced from said opposite sides of said peripheral frame so as to divide said empty space into a pair of empty sub-spaces adjacent to opposite lateral sides of said mullion; a pair of frameworks each comprising a plurality of hinges disposed at said rear face of said peripheral frame and rear sides of said frameworks and connecting each of said frameworks to one of said opposite sides of said peripheral frame at said rear face thereof so that said frameworks can undergo swinging movement toward and away from closed positions within said respective empty sub-spaces adjacent to said opposite lateral sides of said mullion; and a pair of latching assemblies each installed in a respective one of said inner side framework members of said pair of frameworks, said pair of latching assemblies being disposed proximate to one another between and equidistant from said top and bottom framework members of each of said pair of frameworks, and adjacent to one of said opposite lateral sides of said mullion such that each latching assembly extends through said respective one of said inner side framework members of said pair of frameworks from proximate said front sides and toward said rear sides of said frameworks and is disposed adjacent to said front side, along said opposite lateral sides, and past said opposite rear side of said mullion; wherein each of said pair of latching assemblies comprises also wherein said latch mechanisms of said pair of latching assemblies are axially offset from one another along the longitudinal axes of said parallel spindles so that one of said latch mechanisms of one of said pair of latching assemblies is latchably engageable with a portion of an adjacent one of said lateral sides of said mullion and the other of said latch mechanisms of the other of said pair of latching assemblies is latchably engageable with a portion of an adjacent one of said inner side framework members of said pair of frameworks being located past said rear side of said mullion.