Patent ID: 7621082

Claim:
A window assembly comprising a rectangular outer sash frame including a set of elongated sash frame members of extruded rigid plastics material with said sash frame members rigidly connected at corner portions of said sash frame, a set of parallel spaced rectangular inner and outer glass panels surrounded by said outer sash frame, said sash frame members including flange portions projecting laterally inwardly and overlapping a peripheral edge portion of said outer glass panel, said flange portions having integral flexible lip seals engaging said outer glass panel, a rectangular inner sub-sash frame disposed within said outer sash frame and including elongated sub-sash frame members of extruded rigid plastics material, said sub-sash frame members rigidly connected at corner portions of said sub-sash frame and including laterally inwardly projecting flange portions overlapping a peripheral edge portion of said outer glass panel, a bonding material securing said flange portions of said sub-sash frame members to said peripheral edge portion of said outer glass panel, said flange portions of said sash frame members having inwardly projecting longitudinally extending ribs, said sub-sash frame members have base portions with longitudinally extending slots receiving said ribs to limit lateral movement of said sub-sash frame within said outer sash frame, a set of elongated glazing members of extruded plastics material, said glazing members including laterally inwardly projecting flange portions overlapping a peripheral edge portion of said inner glass panel, and said glazing members including retaining portions releasably engaging said outer sash frame and spring-like flange portions releasably engaging said base portions of said sub-sash frame members.