US4813468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two and three position over-under window shade
Assignee: Hunter Douglas Inc
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Filing: 1987-09-08
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Granted: 1989-03-21
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Expires: 2007-09-08
Abstract
Abstract Two and three position over-under shades having at least three horizontal rails separated by pleated blinds. Single or double lift cords are provided to control the raising and lowering of the blinds. Material for the individual blinds may be any material which exhibits suitable properties and meets the aesthetic requirements of the user, this includes translucent single pleated fabric, honeycomb pleated material providing significant thermal insulation, or even insect screen. A blind may be omitted leaving the rail below suspended by its lift cord and providing an opening without raising the entire shade. The design allows a choice of window coverings to be in place and provides different window coverings while maintaining a uniform appearance.
Inventors
- 👤 Donald E. Fraser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:47
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/28; E06B9/30; E06B9/32; E06B9/262; E06B2009/2423; E06B2009/2447; E06B2009/2452; E06B2009/2625; E06B2009/2627
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
A three position window shade comprising: (a) a head rail having top and bottom sides and two ends; (b) a first midrail having top and bottom sides and two ends; (c) a second midrail having top and bottom sides and two ends; (d) a first lift cord passing through the head rail and affixed to the first midrail, providing a means of raising and lowering the first midrail; (e) a bottom rail having top and bottom sides and two ends; (f) a second lift cord passing through the head rail and affixed to the second midrail, providing a means of raising and lowering the second midrail. (g) support means for supporting the bottom rail; and (h) at least two blinds located between and attached to the head rail and first midrail, the first midrail and second midrail, and the second midrail and bottom rail.
Claim 2
Dependent Claim
144 words
A three position window shade comprising: (a) a head rail having top and bottom sides and two ends; (b) a first midrail having top and bottom sides and two ends; (c) a second midrail having top and bottom sides and two ends; (d) a first lift cord passing through the head rail and affixed to the first midrail, providing a means of raising and lowering the first midrail; (e) a bottom rail having top and bottom sides and two ends; (f) a second lift cord passing through the head rail and affixed to the second midrail, providing a means of raising and lowering the second midrail. (g) support means for supporting the bottom rail; and (h) at least two blinds located between and attached to the head rail and first midrail, the first midrail and second midrail, and the second midrail and bottom rail.
Claim 3
Dependent Claim
54 words
The window shade according to claim 1, having two blinds wherein: (a) the first blind is made of a pleated insulating material; and (b) the second blind is made of a single pleat material whereby a choice of insulating cover is provided for the window without altering the visual appearance of the window shade.
Claim 4
Dependent Claim
21 words
The window shade of claim 2 wherein: the pleated insulating material is made of two, side-by-side layers of single pleat material.
Claim 5
Dependent Claim
20 words
The window shade of claim 2 wherein: the pleated insulating material is made with a blind having a cellular structure.
Claim 6
Dependent Claim
58 words
The window shade according to claim 1 wherein: (a) the head rail has a first cord opening at one end and a second cord opening at the other of said ends; and (b) the first cord opening provides a passageway for the first lift cord and the second cord opening provides a passageway for the second lift cord.
Claim 7
Dependent Claim
189 words
A three position window shade comprising: (a) a head rail having top and bottom sides and two ends; (b) a first midrail having top and bottom sides and two ends; (c) a second midrail having top and bottom sides and two ends; (d) a first lift cord passing through the head rail and affixed to the first midrail, providing a means of raising and lowering the first midrail; (e) a bottom rail having top and bottom sides and two ends; (f) a second lift cord passing through the head rail and affixed to the second midrail. (g) a support means for supporting the bottom rail; and (h) at least two blinds located between and attached to the head rail and first midrail, the first midrail and second midrail, and the second midrail and bottom rail, the first of said at least two blinds being fabricated from a pleated insulating material of cellular structure and the second of said at least two blinds being fabricated from a single pleat material whereby a choice of insulating cover is provided for the window without altering the visual appearance of the window shade.
Claim 8
Dependent Claim
189 words
A three position window shade comprising: (a) a head rail having top and bottom sides and two ends; (b) a first midrail having top and bottom sides and two ends; (c) a second midrail having top and bottom sides and two ends; (d) a first lift cord passing through the head rail and affixed to the first midrail, providing a means of raising and lowering the first midrail; (e) a bottom rail having top and bottom sides and two ends; (f) a second lift cord passing through the head rail and affixed to the second midrail. (g) a support means for supporting the bottom rail; and (h) at least two blinds located between and attached to the head rail and first midrail, the first midrail and second midrail, and the second midrail and bottom rail, the first of said at least two blinds being fabricated from a pleated insulating material of cellular structure and the second of said at least two blinds being fabricated from a single pleat material whereby a choice of insulating cover is provided for the window without altering the visual appearance of the window shade.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |