US3818969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inclined-plane venetian-blind installation
Assignee: Levolor Corp
•
Filing: 1971-11-22
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Granted: 1974-06-25
•
Expires: 1991-11-22
Abstract
Abstract A building wall inclines to the vertical and has a window opening therein which is provided with a Venetian blind. The general plane of the window opening inclines similarly to the inclination of the wall, and the plane of the ladder-and-slat assembly of the blind is inclined to correspond with the inclination of the window opening.
Inventors
- 👤 V Debs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:12
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/28; E06B9/30; E06B9/32; E06B9/327
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
176 words
A Venetian blind installation in which (a) the Venetian blind has a head and a ladder-and-slat assembly that depends from the head, (b) tensioned wires which are anchored top and bottom extend throughout the height of the ladder-and-slat assembly, and (c) the tensioned wires are inclined and dispose the ladder-andslat assembly in an inclined plane - wherein the improvement comprises: the tensioned wires are at least three in number, the tensioned wires include two end wires and an intervening wire, the end wires are toward the opposite ends of the slats and the intervening wire is remote from the ends of the slats, these tensioned wires extend upwardly through individual tiers of holes in the slats, each end wire, after passing upwardly through the tier of holes in the slats, terminate substantially straight ahead at a location which is generally in prolongation of the tier of holes in the slats, the ladder-and-slat assembly includes end ladders and at least one intervening ladder, and an intervening ladder is aligned front to rear with said intervening tensioned wire.
Claim 2
Dependent Claim
176 words
A Venetian blind installation in which (a) the Venetian blind has a head and a ladder-and-slat assembly that depends from the head, (b) tensioned wires which are anchored top and bottom extend throughout the height of the ladder-and-slat assembly, and (c) the tensioned wires are inclined and dispose the ladder-andslat assembly in an inclined plane - wherein the improvement comprises: the tensioned wires are at least three in number, the tensioned wires include two end wires and an intervening wire, the end wires are toward the opposite ends of the slats and the intervening wire is remote from the ends of the slats, these tensioned wires extend upwardly through individual tiers of holes in the slats, each end wire, after passing upwardly through the tier of holes in the slats, terminate substantially straight ahead at a location which is generally in prolongation of the tier of holes in the slats, the ladder-and-slat assembly includes end ladders and at least one intervening ladder, and an intervening ladder is aligned front to rear with said intervening tensioned wire.
Claim 3
Dependent Claim
44 words
A Venetian blind installation as in claim 1 in which the head of the blind is mounted on installation brackets, and wherein the improvement additionally comprises: the end wires, after passing upwardly through the slats, terminate at and are fastened to the installation brackets.
Claim 4
Dependent Claim
25 words
A Venetian blind installation as in claim 2 wherein the improvement additionally comprises: the end wires are fastened to the installation brackets by quick-attachable connections.
Claim 5
Dependent Claim
58 words
A Venetian blind installation as in claim 2 in which the head is mountable on and demountable from the installation brackets, and wherein the improvement additionally comprises: the end wires are fastened to the installation brackets by quick-detachable connections, and the head, when mounted on the installation brackets, prevents detachment of the end wires from the installation brackets.
Claim 6
Dependent Claim
38 words
A Venetian blind installation as in claim 1 wherein the improvement additionally comprises: said intervening tensioned wire, after passing upwardly through the slats, enters the head of the blind and is anchored on the interior of the head.
Claim 7
Dependent Claim
37 words
A Venetian blind installation as in claim 1 in which the head includes at least one tilt-rod cradle, and wherein the improvement additionally comprises: the upper end of said intervening wire is anchored to the tilt-rod cradle.
Claim 8
Dependent Claim
60 words
A Venetian blind installation as in claim 1 in which the ladder-and-slat assembly includes a bottom bar that serves as the lowermost slat and is of the same length as the next higher slat, and wherein the improvement additionally comprises: the body of the bottom bar is provided with holes through which the end wires and said interveniNg wire pass.
Claim 9
Dependent Claim
155 words
A Venetian blind installation in which (a) the Venetian blind has a head and a ladder-and-slat assembly that depends from the head, (b) there are installation brackets at the opposite ends of the head, (c) the head is mountable on and demountable from the installation brackets, (d) tensioned wires which are anchored top and bottom extend throughout the height of the ladder-and-slat assembly, and (e) the tensioned wires are inclined and dispose the ladder-and-slat assembly in an inclined plane - wherein the improvement comprises: the tensioned wires include at least two wires which are end wires that are toward the opposite ends of the slats, these end wires extend upwardly through individual tiers of holes in the slats, these end wires, after passing upwardly through the slats, are attached to the installation brackets by quick-detachable connections, and the head, when mounted on the installation brackets, prevents detachment of these end wires from the installation brackets.
Claim 10
Dependent Claim
155 words
A Venetian blind installation in which (a) the Venetian blind has a head and a ladder-and-slat assembly that depends from the head, (b) there are installation brackets at the opposite ends of the head, (c) the head is mountable on and demountable from the installation brackets, (d) tensioned wires which are anchored top and bottom extend throughout the height of the ladder-and-slat assembly, and (e) the tensioned wires are inclined and dispose the ladder-and-slat assembly in an inclined plane - wherein the improvement comprises: the tensioned wires include at least two wires which are end wires that are toward the opposite ends of the slats, these end wires extend upwardly through individual tiers of holes in the slats, these end wires, after passing upwardly through the slats, are attached to the installation brackets by quick-detachable connections, and the head, when mounted on the installation brackets, prevents detachment of these end wires from the installation brackets.
Claim 11
Dependent Claim
79 words
A Venetian blind installation as in claim 8 wherein the improvement additionally comprises: the quick-detachable connection for each of the end wires includes a slot in the installation bracket that receives the wire sidewise and an abutment on the wire which prevents the wire from being pulled longitudinally through the slot, and the head of the blind, when mounted on the installation bracket, blocks reverse sidewise movement of the wire that would disengage the wire from the installation bracket.
Claim 12
Dependent Claim
62 words
A Venetian blind installation as in claim 9 wherein the improvement additionally comprises: the slot which receives the wire sidewise is the narrow portion of a key-hole slot, and the wide portion of the key-hole slot receives the wire-attached abutment by movement of the wire longitudinally of itself, preparatory to moving the wire sidewise into the narrow portion of the key-hole slot.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |