US4335551A — Skylight construction and method of making same

Claim 1

Independent Claim 161 words

In a skylight comprising; a support; an outer sheet made of a light-transmitting material and having a peripheral portion adjoining said support; and an inner structure made of light-transmitting material and having a peripheral edge portion attached to said support defining a first air space between said outer sheet and said structure; the improvement wherein said inner structure comprises a pair of inner sheets each made of a light-transmitting material, said inner sheets being held in spaced relation defining a second air space therebetween, said sheets and first and second air spaces enabling provision of said skylight construction having mininmum weight yet providing minimum heat loss in winter and minimum heat gain in summer, said inner sheets being made of synthetic plastic material, and means holding said inner sheets to define said second air space therebetween, said holding means comprising a plurality of substantially identical spaced parallel ribs extending between said inner sheets and fixing same together in spaced parallel relation.

Claim 2

Dependent Claim 161 words

In a skylight comprising; a support; an outer sheet made of a light-transmitting material and having a peripheral portion adjoining said support; and an inner structure made of light-transmitting material and having a peripheral edge portion attached to said support defining a first air space between said outer sheet and said structure; the improvement wherein said inner structure comprises a pair of inner sheets each made of a light-transmitting material, said inner sheets being held in spaced relation defining a second air space therebetween, said sheets and first and second air spaces enabling provision of said skylight construction having mininmum weight yet providing minimum heat loss in winter and minimum heat gain in summer, said inner sheets being made of synthetic plastic material, and means holding said inner sheets to define said second air space therebetween, said holding means comprising a plurality of substantially identical spaced parallel ribs extending between said inner sheets and fixing same together in spaced parallel relation.

Claim 3

Dependent Claim 154 words

In a skylight construction comprising; a support; an outer sheet made of a light-transmitting material and having a peripheral portion adjoining said support; and an inner structure made of light-transmitting material and having a peripheral edge portion attached to said support defining a first air space between said outer sheet and said structure; the improvement wherein said inner structure comprises a pair of inner sheets each made of a light-transmitting material, said inner sheets being held in spaced relation defining a second air space therebetween, said sheets and first and second air spaces enabling provision of said skylight construction having minimum weight yet providing minimum heat loss in winter and minimum heat gain in summer, each of said sheets being made of polycarbonate, and means holding said inner sheets to define said second air space therebetween, said inner sheets and holding means being made of the same polycarbonate and as a single piece structure.

Claim 4

Dependent Claim 154 words

In a skylight construction comprising; a support; an outer sheet made of a light-transmitting material and having a peripheral portion adjoining said support; and an inner structure made of light-transmitting material and having a peripheral edge portion attached to said support defining a first air space between said outer sheet and said structure; the improvement wherein said inner structure comprises a pair of inner sheets each made of a light-transmitting material, said inner sheets being held in spaced relation defining a second air space therebetween, said sheets and first and second air spaces enabling provision of said skylight construction having minimum weight yet providing minimum heat loss in winter and minimum heat gain in summer, each of said sheets being made of polycarbonate, and means holding said inner sheets to define said second air space therebetween, said inner sheets and holding means being made of the same polycarbonate and as a single piece structure.

Claim 5

Dependent Claim 36 words

In a skylight construction as set forth in claim 2 the further improvement in which said holding means comprises a plurality of substantially identical spaced parallel ribs extending between said inner sheets and fixing same together.

Claim 6

Dependent Claim 38 words

In a skylight construction as set forth in claim 3 the further improvement in which said ribs are continuous surface ribs disposed perpendicular to said inner sheets, said ribs having substantially the same thickness as said inner sheets.

Claim 7

Dependent Claim 35 words

In a skylight construction as set forth in claim 4 the further improvement in which said thickness of said inner sheets and ribs is a small fractional part of the thickness of said outer sheet.

Claim 8

Dependent Claim 47 words

In a skylight construction as set forth in claim 5 the further improvement in which said inner sheets and ribs are in the form of extruded sheets and ribs and said holding means comprise defining said sheets and ribs during the extrusion process as said single-piece structure.

Claim 9

Dependent Claim 26 words

In a skylight construction as set forth in claim 2 the further improvement in which said outer sheet and support are defined as a single-piece structure.

Claim 10

Dependent Claim 57 words

In a skylight construction as set forth in claim 7 the further improvement in which said support has an L-shaped cross-sectional outline defined by a pair of legs adjoined at a common bight, one of said legs having said outer sheet blending smoothly therewith and the other of said legs being disposed perpendicular to said one leg.

Claim 11

Dependent Claim 43 words

In a skylight construction as set forth in claim 8 the further improvement in which said other leg has a plurality of openings therethrough for attaching thereof to a tubular curb structure extending from a roof and surrounding an opening in said roof.

Claim 12

Dependent Claim 38 words

In a skylight construction as set forth in claim 9 the further improvement in which said other leg has a lower edge provided with an outwardly flared skirt and said outer sheet has an outwardly convex dome-like configuration.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1985-06-21	1985-12-21	1986-06-22	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1989-06-21	1989-12-21	1990-06-22	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1993-06-21	1993-12-21	1994-06-22	$7700.00	Window Closed / Lapsed

Skylight construction and method of making same

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