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WO1995016100A1 - Sun protection - Google Patents

Sun protection Download PDF

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Publication number
WO1995016100A1
WO1995016100A1 PCT/NL1994/000311 NL9400311W WO9516100A1 WO 1995016100 A1 WO1995016100 A1 WO 1995016100A1 NL 9400311 W NL9400311 W NL 9400311W WO 9516100 A1 WO9516100 A1 WO 9516100A1
Authority
WO
WIPO (PCT)
Prior art keywords
elements
strip
sun protection
sun
group
Prior art date
Application number
PCT/NL1994/000311
Other languages
French (fr)
Inventor
Wubbo DANIËLS
Original Assignee
Openbaar Lichaam Werkvoorzieningsschap Marrelân Groep
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Openbaar Lichaam Werkvoorzieningsschap Marrelân Groep filed Critical Openbaar Lichaam Werkvoorzieningsschap Marrelân Groep
Publication of WO1995016100A1 publication Critical patent/WO1995016100A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/03—Sky-lights; Domes; Ventilating sky-lights
    • E04D13/033—Sky-lights; Domes; Ventilating sky-lights provided with means for controlling the light-transmission or the heat-reflection, (e.g. shields, reflectors, cleaning devices)
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds

Definitions

  • the invention relates to a sun protection for substantially horizontal windows.
  • substantially horizontal windows Understood by substantially horizontal windows are for instance dome lights in flat roofs or skylights in slightly sloping roofs.
  • horizontal windows generally give a very good incidence of light into the space located therebelow, they also provide free access to insolation into the space.
  • An undesirably high light intensity can hereby result locally, while furthermore the warming by the direct insolation is usually undesired.
  • the invention now has for its object to provide a sun protection for substantially horizontal windows with which the direct insolation can be prevented without reducing to a significant extent the amount of incident light.
  • the step of claim 2 is applied. Direct insolation early in the morning or late in the afternoon are hereby also prevented.
  • a suitable embodiment is herein characterized in claim 3.
  • the strip-like elements are mutually supporting so that a sturdy whole can still be obtained with a relatively light construction.
  • Another possible embodiment of the sun protection according to the invention is characterized in claim 4.
  • Such an embodiment is particularly suitable for round windows such as round dome lights. Dome lights are usually used in double-walled form. In such dome lights the invention can be applied in very favourable manner as characterized in claim 5.
  • a suitable embodiment is herein characterized in claim 7.
  • the step of claim 8 is preferably applied. With this step is achieved that not only the light from the sky directly vertically above the window enters but also the external light radiating at an angle. With the step of claim 9 is achieved that heating of the space under the window is prevented to a significant extent. Only infrared radiation from the sky directly vertically above the window can penetrate through the window into the space. Infrared externally radiating at an angle is for the greater part absorbed by the surface of the strip- like elements and thus does not reach the space under the window.
  • Fig. 1 shows a perspective view of a sun protection according to the invention disposed above a dome light.
  • Fig. 2 shows in side view the partial section according to arrow II-II in fig. 1.
  • Fig. 3 shows the section according to arrow II-II in perspective view.
  • Fig. 4 is a partly broken away perspective view of another embodiment of the sun protection according to the invention.
  • Fig. 5 shows another favourable embodiment of the invention.
  • Fig. 6 shows a further development of the sun protection according to the invention.
  • Fig. 1 shows a sun protection 1 which is disposed above a dome light 2 which is arranged in a roof 3 of a building. This dome light 2 forms a substantially horizontal window with light incidence from the sky above.
  • the sun protection 1 also prevents direct solar radiation from being able to penetrate through the window into the underlying space.
  • Sun protection 1 comprises a framework 5 of U-profile which is supported by four legs 4.
  • Four assemblies 6 of strip-like elements are mounted in the framework 5.
  • each assembly 6 comprises a first group of strip-like elements 7 which extend with their side surfaces facing each other at substantially equal mutual distance.
  • the strip-like elements are disposed vertically in their width direction.
  • the strip-like elements are arranged at a mutual distance 10 such that the quotient of the height 11, which in this case is the same as the width of each strip-like element 7, and the distance 10 is at least equal to the tangent of the angle 8 at which the sun lies in its highest position.
  • a fixedly arranged sun protection of the type as shown for instance in fig. 1 will be disposed such that the strip ⁇ like elements 7 extend in east-west direction. This means that early and later in the day the sun comes to lie more in the plane of strip-like elements 7 and can thus shine through between strip-like elements 7.
  • a second group of strip-like elements 15 is therefore preferably applied which extends transversely of the first group of elements 7.
  • the strip-like elements 15, 7 are each provided at the position of intersection of the strip ⁇ like elements with slots extending respectively over the upper and the lower half-height, and these strips 7, 15 are placed into each other.
  • the strip-like elements support each other for torsional load so that a rigid whole is obtained.
  • the strip-like elements can herein be given a very thin form and still extend over a considerable length.
  • the sun protection 20 as shown in fig. 4 makes use of the same principle, but has a different embodiment.
  • the strip-like elements which extend with their side surfaces facing each other and at substantially equal mutual distance are embodied herein as concentric rings 22. Such an embodiment is particularly suitable for use with a round dome light 21.
  • Fig. 5 shows a per se known double-walled dome light into which the invention is integrated.
  • the dome light 35 contains an outer dome 36 and an inner dome 37 with a small curvature. Formed between outer dome 36 and inner dome 37 is an interspace in which is enclosed a quantity of air which serves as insulation.
  • outer dome 36 and inner dome 37 In the space between outer dome 36 and inner dome 37 is arranged a number of rings 38, 39 which form the strip-like elements which prevent direct insolation.
  • the assembly of outer dome 36, inner dome 37 and rings 38, 39 accommodated therein is mounted integrally on an upstand 40 arranged on a roof.
  • the dome light has a square base.
  • the rings 38, 39 will accordingly not have a circular form but a rectangular form with corners rounded to a greater or lesser degree.
  • the rings do not have to be fixed to one or both domes 36, 37. They remain automatically locked in the interspace between the outer dome 36 and inner dome 37 which becomes steadily narrower towards the sides.
  • the strip-like elements 27 are arranged fixedly, while the strip-like elements 26 of the other group are mounted for pivoting parallel to their longitudinal direction.
  • Strip-like elements 26 are provided at the position of the intersection with strip-like elements 27 with a slot over their whole height and are connected on the underside to a pivot shaft 29.
  • the pivot shafts 29 are mounted in a side frame part 28. Mounted on the ends of the pivot shafts 29 protruding outside the frame part 28 are arms 30 which are connected non-movably to pivot shaft 29. The free ends of the arms 30 are hingedly connected to a control rod 31. Through reciprocal movement of control rod 31 in the direction of arrow 32 all strip-like elements 26 will swivel reciprocally in the direction of arrow 33. It is hereby possible to adapt the position of the strip-like elements 26 to the position of the sun. At a low position of the sun the strip-like elements 26 can be tilted further to the right as seen in fig. 5 and, at a high position of the sun, to the left. The appropriate distance and height of the strip-like elements are then of course the horizontal distance from the top edge of one element to the bottom edge of the following element, while the height is the vertical height of the elements in their inclining position.
  • the drive means for turning strip-like elements 26 can for instance be coupled to a time control which ensures that the strip-like elements 26 are turned in accordance with the variation of the position of the sun during the day. Adjustment during the course of the year taking into account the difference in the highest position of the sun in summer and winter is also possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
  • Building Environments (AREA)

Abstract

The invention relates to a sun protection (1) for substantially horizontal windows (2), comprising an assembly of a group of strip-like elements (6) for disposing parallel to the window (2), which elements extend with their side surfaces facing each other at substantially equal mutual distance. The quotient of the height of the elements and their mutual distance is therein at least equal to the tangent of the angle at which the sun lies in its highest position.

Description

SUN PROTECTION
The invention relates to a sun protection for substantially horizontal windows.
Understood by substantially horizontal windows are for instance dome lights in flat roofs or skylights in slightly sloping roofs. Although horizontal windows generally give a very good incidence of light into the space located therebelow, they also provide free access to insolation into the space. An undesirably high light intensity can hereby result locally, while furthermore the warming by the direct insolation is usually undesired.
In view of these drawbacks it is known to provide the horizontal windows with a layer of limewash in order to prevent direct insolation. Hereby, however, the amount of light allowed through likewise decreases considerably. The invention now has for its object to provide a sun protection for substantially horizontal windows with which the direct insolation can be prevented without reducing to a significant extent the amount of incident light.
This object is achieved with a sun protection according to the invention as characterized in claim 1. Seen from the direction of the sun the strip-like elements together cover the whole window, so that direct solar radiation through the window cannot occur. The incidence of light from the sky directly above the window is however not obstructed, so that the desired good and uniform lighting of the space under the window is still achieved.
According to a further development the step of claim 2 is applied. Direct insolation early in the morning or late in the afternoon are hereby also prevented. A suitable embodiment is herein characterized in claim 3. The strip-like elements are mutually supporting so that a sturdy whole can still be obtained with a relatively light construction. Another possible embodiment of the sun protection according to the invention is characterized in claim 4. Such an embodiment is particularly suitable for round windows such as round dome lights. Dome lights are usually used in double-walled form. In such dome lights the invention can be applied in very favourable manner as characterized in claim 5.
A favourable further development is characterized in claim 6. By rotating the strip-like elements so far that the direct insolation is only just prevented, the maximum incidence of light is achieved without inconvenient direct insolation.
A suitable embodiment is herein characterized in claim 7. For optimum incidence of light the step of claim 8 is preferably applied. With this step is achieved that not only the light from the sky directly vertically above the window enters but also the external light radiating at an angle. With the step of claim 9 is achieved that heating of the space under the window is prevented to a significant extent. Only infrared radiation from the sky directly vertically above the window can penetrate through the window into the space. Infrared externally radiating at an angle is for the greater part absorbed by the surface of the strip- like elements and thus does not reach the space under the window.
The invention will be further elucidated in the following description with reference to a number of embodiments shown in the figures. Fig. 1 shows a perspective view of a sun protection according to the invention disposed above a dome light.
Fig. 2 shows in side view the partial section according to arrow II-II in fig. 1.
Fig. 3 shows the section according to arrow II-II in perspective view.
Fig. 4 is a partly broken away perspective view of another embodiment of the sun protection according to the invention. Fig. 5 shows another favourable embodiment of the invention.
Fig. 6 shows a further development of the sun protection according to the invention. Fig. 1 shows a sun protection 1 which is disposed above a dome light 2 which is arranged in a roof 3 of a building. This dome light 2 forms a substantially horizontal window with light incidence from the sky above.
The sun protection 1 also prevents direct solar radiation from being able to penetrate through the window into the underlying space.
Sun protection 1 comprises a framework 5 of U-profile which is supported by four legs 4. Four assemblies 6 of strip-like elements are mounted in the framework 5. As shown in fig. 2 and 3, each assembly 6 comprises a first group of strip-like elements 7 which extend with their side surfaces facing each other at substantially equal mutual distance. In the shown embodiment the strip-like elements are disposed vertically in their width direction. The strip-like elements are arranged at a mutual distance 10 such that the quotient of the height 11, which in this case is the same as the width of each strip-like element 7, and the distance 10 is at least equal to the tangent of the angle 8 at which the sun lies in its highest position.
It will be apparent from fig. 2 that at the highest position of the sun, wherein the sun therefore lies at the angle 8, the solar rays designated with the line 12 can just not fall directly between the strip-like elements 7. On the other hand, the incidence of light from above is not obstructed. A large amount of light can thus enter through the window 2 between strip-like elements 7, while direct insolation is obstructed. Nor at lower positions of the sun, such as designated for instance with the angle 9, can any direct insolation occur.
A fixedly arranged sun protection of the type as shown for instance in fig. 1 will be disposed such that the strip¬ like elements 7 extend in east-west direction. This means that early and later in the day the sun comes to lie more in the plane of strip-like elements 7 and can thus shine through between strip-like elements 7. In such a fixedly arranged embodiment a second group of strip-like elements 15 is therefore preferably applied which extends transversely of the first group of elements 7.
As shown in fig. 3, the strip-like elements 15, 7 are each provided at the position of intersection of the strip¬ like elements with slots extending respectively over the upper and the lower half-height, and these strips 7, 15 are placed into each other. The strip-like elements support each other for torsional load so that a rigid whole is obtained. The strip-like elements can herein be given a very thin form and still extend over a considerable length. The sun protection 20 as shown in fig. 4 makes use of the same principle, but has a different embodiment. The strip-like elements which extend with their side surfaces facing each other and at substantially equal mutual distance are embodied herein as concentric rings 22. Such an embodiment is particularly suitable for use with a round dome light 21. The mutual distance of the concentrically arranged strip-like elements is such that the insolation at the angle 23, which can for instance correspond with the highest position of the sun, is blocked. If it is desired to position the strip-like elements 22 higher towards the middle, for instance to adapt to the convex form of dome light 21, it may be desired to opt for a greater height of the strip-like elements on the south side than on the north side or to opt for a smaller distance between the strip-like elements on the south side than on the north side. Another solution is to allow the height of all elements to be determined by the necessary distance and height on the north side. Only then can a uniform construction be obtained. Fig. 5 shows a per se known double-walled dome light into which the invention is integrated. The dome light 35 contains an outer dome 36 and an inner dome 37 with a small curvature. Formed between outer dome 36 and inner dome 37 is an interspace in which is enclosed a quantity of air which serves as insulation.
In the space between outer dome 36 and inner dome 37 is arranged a number of rings 38, 39 which form the strip-like elements which prevent direct insolation. The assembly of outer dome 36, inner dome 37 and rings 38, 39 accommodated therein is mounted integrally on an upstand 40 arranged on a roof.
An embodiment is shown wherein the dome light has a square base. The rings 38, 39 will accordingly not have a circular form but a rectangular form with corners rounded to a greater or lesser degree. The rings do not have to be fixed to one or both domes 36, 37. They remain automatically locked in the interspace between the outer dome 36 and inner dome 37 which becomes steadily narrower towards the sides. In the embodiment of the sun protection 25 as shown in fig. 6, the strip-like elements 27 are arranged fixedly, while the strip-like elements 26 of the other group are mounted for pivoting parallel to their longitudinal direction. Strip-like elements 26 are provided at the position of the intersection with strip-like elements 27 with a slot over their whole height and are connected on the underside to a pivot shaft 29. The pivot shafts 29 are mounted in a side frame part 28. Mounted on the ends of the pivot shafts 29 protruding outside the frame part 28 are arms 30 which are connected non-movably to pivot shaft 29. The free ends of the arms 30 are hingedly connected to a control rod 31. Through reciprocal movement of control rod 31 in the direction of arrow 32 all strip-like elements 26 will swivel reciprocally in the direction of arrow 33. It is hereby possible to adapt the position of the strip-like elements 26 to the position of the sun. At a low position of the sun the strip-like elements 26 can be tilted further to the right as seen in fig. 5 and, at a high position of the sun, to the left. The appropriate distance and height of the strip-like elements are then of course the horizontal distance from the top edge of one element to the bottom edge of the following element, while the height is the vertical height of the elements in their inclining position.
The drive means for turning strip-like elements 26 can for instance be coupled to a time control which ensures that the strip-like elements 26 are turned in accordance with the variation of the position of the sun during the day. Adjustment during the course of the year taking into account the difference in the highest position of the sun in summer and winter is also possible.

Claims

1. Sun protection for substantially horizontal windows, comprising an assembly of a group of strip-like elements for disposing parallel to the window, which elements extend with their side surfaces facing each other at substantially equal mutual distance and wherein the quotient of the height of the elements and their mutual distance is at least equal to the tangent of the angle at which the sun lies in its highest position.
2. Sun protection as claimed in claim 1, wherein a second group of strip-like elements extends transversely of the first group of strip-like elements.
3. Sun protection as claimed in claim 2, wherein at the position of the intersection of the strip-like elements these latter are provided with slots extending respectively over the upper and lower half-height, and are placed into each other.
4. Sun protection as claimed in claim 1, wherein the strip-like elements form a number of concentric rings.
5. Sun protection as claimed in claim 4, wherein the window is a double-walled dome light and the concentric rings of strip-like elements are received between the two walls of the dome.
6. Sun protection as claimed in claim 1 or 2, wherein at least a number of strip-like elements of a group are mounted for pivoting parallel to their longitudinal direction and drive means are arranged for turning these elements.
7. Sun protection as claimed in claim 6, comprising coupling means connected to the number of elements for causing synchronous movement of all elements of the number.
8. Sun protection as claimed in any of the foregoing claims, wherein the surface of the strip-like elements is embodied for reflecting visible light.
9. Sun protection as claimed in any of the foregoing claims, wherein the surface of the strip-like elements is embodied for absorbing infrared light.
PCT/NL1994/000311 1993-12-08 1994-12-07 Sun protection WO1995016100A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9302141A NL9302141A (en) 1993-12-08 1993-12-08 Sun protection.
NL9302141 1993-12-08

Publications (1)

Publication Number Publication Date
WO1995016100A1 true WO1995016100A1 (en) 1995-06-15

Family

ID=19863247

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1994/000311 WO1995016100A1 (en) 1993-12-08 1994-12-07 Sun protection

Country Status (2)

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NL (1) NL9302141A (en)
WO (1) WO1995016100A1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2313869A (en) * 1996-06-03 1997-12-10 Gen Electric Thermoplastic safety sheet for roof lights
GB2356216A (en) * 1999-11-10 2001-05-16 David John Anderson Heat reflective sheet member for a glazed roof
DE10202830A1 (en) * 2002-01-24 2003-08-14 Colt Internat Holdings Ag Baar Device for adjusting a technical light element uses difference sensor between solar position sensor and light adjustment device sensor
WO2003080955A1 (en) * 2002-03-21 2003-10-02 Forbis Jack R Sr Cooling shade assembly and method of use thereof
DE20313025U1 (en) 2003-08-21 2003-10-30 Essmann GmbH & Co. KG, 32107 Bad Salzuflen Sunshades for domed roof skylights has part-perforated pyramid of sheet metal panels on base frame
DE10211566A1 (en) * 2002-03-15 2003-11-06 Strunz Heinrich Gmbh Sun protection unit has a visor for fitting into roofs, winter gardens etc and has holes and a spacer
GB2388865A (en) * 2002-05-20 2003-11-26 Nigel John Sunter Egg-crate sun-screen louvres
US7246468B2 (en) 2002-03-21 2007-07-24 Forbis Sr Jack R Shade assembly for storage tank and method of use thereof
NL1031645C2 (en) * 2006-04-20 2007-10-23 Axeon B V Roof window, especially for installing in protected monument building, has cover designed to camouflage window when viewed at acute angle from outside
WO2015085442A1 (en) * 2013-12-10 2015-06-18 Hermosilla Salazar Guillermo David Home-automated bioclimatic roof
US9194128B1 (en) * 2015-04-20 2015-11-24 Arizona Sky Shades, Llc Exterior mounted solar shade screen for skylights
US9416542B2 (en) * 2014-09-16 2016-08-16 Entech Solar, Inc. Passive skylight dome configured to increase light to increase collection at low sun elevation angles and to reduce light at high sun elevation angles
US9976308B1 (en) 2017-02-21 2018-05-22 Entech Solar Inc Tall skylight dome with sun shade and diffusing partial cap to strengthen dome to capture low sun elevation angle light
US10208909B2 (en) 2016-06-08 2019-02-19 Entech Solar, Inc Passive skylight with two parabolic reflector segments

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH383602A (en) * 1958-12-22 1964-10-31 Strub Roessler Hermann Roofing with light grid
DE1509074A1 (en) * 1963-03-01 1970-03-26 G A Bartenbach Gmbh Skylights
DE2640231B1 (en) * 1976-09-07 1977-12-22 Katsuyuki Akiyoshi Filter device
DE2720617A1 (en) * 1977-05-07 1978-11-09 Harald Ing Grad Vetter Ventilation flap for flat roof - has internal blind, with light-dependent control, and insulating gas filling
US4505069A (en) * 1983-02-18 1985-03-19 Delbert Freeman Anti-intrusion skylight blind
WO1993015427A1 (en) * 1992-01-23 1993-08-05 Sea Corporation Energy efficient skylight and blind

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH383602A (en) * 1958-12-22 1964-10-31 Strub Roessler Hermann Roofing with light grid
DE1509074A1 (en) * 1963-03-01 1970-03-26 G A Bartenbach Gmbh Skylights
DE2640231B1 (en) * 1976-09-07 1977-12-22 Katsuyuki Akiyoshi Filter device
DE2720617A1 (en) * 1977-05-07 1978-11-09 Harald Ing Grad Vetter Ventilation flap for flat roof - has internal blind, with light-dependent control, and insulating gas filling
US4505069A (en) * 1983-02-18 1985-03-19 Delbert Freeman Anti-intrusion skylight blind
WO1993015427A1 (en) * 1992-01-23 1993-08-05 Sea Corporation Energy efficient skylight and blind

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2313869A (en) * 1996-06-03 1997-12-10 Gen Electric Thermoplastic safety sheet for roof lights
GB2356216A (en) * 1999-11-10 2001-05-16 David John Anderson Heat reflective sheet member for a glazed roof
GB2356216B (en) * 1999-11-10 2003-06-18 David John Anderson Improved solar reflective properties
DE10202830A1 (en) * 2002-01-24 2003-08-14 Colt Internat Holdings Ag Baar Device for adjusting a technical light element uses difference sensor between solar position sensor and light adjustment device sensor
DE10211566A1 (en) * 2002-03-15 2003-11-06 Strunz Heinrich Gmbh Sun protection unit has a visor for fitting into roofs, winter gardens etc and has holes and a spacer
US7246468B2 (en) 2002-03-21 2007-07-24 Forbis Sr Jack R Shade assembly for storage tank and method of use thereof
WO2003080955A1 (en) * 2002-03-21 2003-10-02 Forbis Jack R Sr Cooling shade assembly and method of use thereof
GB2388865A (en) * 2002-05-20 2003-11-26 Nigel John Sunter Egg-crate sun-screen louvres
DE20313025U1 (en) 2003-08-21 2003-10-30 Essmann GmbH & Co. KG, 32107 Bad Salzuflen Sunshades for domed roof skylights has part-perforated pyramid of sheet metal panels on base frame
NL1031645C2 (en) * 2006-04-20 2007-10-23 Axeon B V Roof window, especially for installing in protected monument building, has cover designed to camouflage window when viewed at acute angle from outside
WO2015085442A1 (en) * 2013-12-10 2015-06-18 Hermosilla Salazar Guillermo David Home-automated bioclimatic roof
US9416542B2 (en) * 2014-09-16 2016-08-16 Entech Solar, Inc. Passive skylight dome configured to increase light to increase collection at low sun elevation angles and to reduce light at high sun elevation angles
US9194128B1 (en) * 2015-04-20 2015-11-24 Arizona Sky Shades, Llc Exterior mounted solar shade screen for skylights
US10208909B2 (en) 2016-06-08 2019-02-19 Entech Solar, Inc Passive skylight with two parabolic reflector segments
US9976308B1 (en) 2017-02-21 2018-05-22 Entech Solar Inc Tall skylight dome with sun shade and diffusing partial cap to strengthen dome to capture low sun elevation angle light
US10329769B2 (en) 2017-02-21 2019-06-25 Entech Solar, Inc Tall skylight dome with sun shade and diffusing partial cap to strengthen dome to capture low sun elevation angle light

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Publication number Publication date
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