US4697630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tilt mechanism for venetian blinds
Assignee: Rollease Inc
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Filing: 1987-03-17
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Granted: 1987-10-06
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Expires: 2007-03-17
Abstract
Abstract A tilt mechanism for monocontrol Venetian blinds uses band brakes to the ends of which the ladder cords are attached. The weight of the blind provides the tightening forces to cause the band brakes to grip the rotating control rod and rotate the slats to open and close the blind. Stops loosen the band brakes allowing further rotation for raising or lowering of the blind to take place with a minimum of torque.
Inventors
- 👤 Edward T. Rude
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:48
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/28; E06B9/30; E06B9/303; E06B9/307
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
34 words
A tilter for a monocontrol Venetian blind comprising a helix adapted for rotatable disposition about a central rod, each end of said helix being configured for attachment to one leg of a ladder cord.
Claim 2
Dependent Claim
34 words
A tilter for a monocontrol Venetian blind comprising a helix adapted for rotatable disposition about a central rod, each end of said helix being configured for attachment to one leg of a ladder cord.
Claim 3
Dependent Claim
63 words
A tilter for a monocontrol Venetian blind in accordance with claim 1 wherein said helix is configured to grip said central rod to rotate therewith when the tensions in said ladder cord legs produce a net component of force in a direction that tends to tighten said tilter about said central rod and to slip when said net component of force is absent.
Claim 4
Independent Claim
104 words
A system for controlling the tilt of a monocontrol Venetian blind comprising a helical tilter adapted for rotatable disposition about a central rod, each end of said helical tilter being configured for attachment to one leg of a ladder cord; and a sleeve of a generally cylindrical shape mounted for rotation with said central rod; said helical tilter being configured to grip said sleeve to rotate therewith when the tensions in said ladder cord legs produce a net component of force in a direction that tends to tighten said tilter about said sleeve and to slip when said net component of force is absent.
Claim 5
Independent Claim
104 words
A system for controlling the tilt of a monocontrol Venetian blind comprising a helical tilter adapted for rotatable disposition about a central rod, each end of said helical tilter being configured for attachment to one leg of a ladder cord; and a sleeve of a generally cylindrical shape mounted for rotation with said central rod; said helical tilter being configured to grip said sleeve to rotate therewith when the tensions in said ladder cord legs produce a net component of force in a direction that tends to tighten said tilter about said sleeve and to slip when said net component of force is absent.
Claim 6
Dependent Claim
59 words
A system for controlling the tilt of a monocontrol Venetian blind in accordance with claim 3 wherein said tilter ends are configured such that said ladder cord legs are positioned beyond the end of said sleeve to provide clearance for said legs to lie closer to the axis of said central rod than the outside radius of said sleeve.
Claim 7
Dependent Claim
43 words
A system for controlling the tilt of a monocontrol Venetian blind in accordance with claim 3 further including a stop positioned for loosening the grip of said tilter on said rod at the position corresponding to full tilt for either direction of rotation.
Claim 8
Dependent Claim
37 words
A system for controlling the tilt of a monocontrol Venetian blind in accordance with claim 5 in which said stop is positioned to loosen said tilter when said tilter is rotated to at least a vertical orientation.
Claim 9
Dependent Claim
31 words
A system for controlling the tilt of a monocontrol Venetian blind in accordance with claim 5 in which said helical tilter has more than one turn disposed around said central rod.
Claim 10
Dependent Claim
25 words
A system for controlling the tilt of a monocontrol Venetian blind in accordance with claim 5 in which said tilter is made of plastic material.
Claim 11
Dependent Claim
31 words
A system for controlling the tilt of a monocontrol Venetian blind in accordance with claim 3 in which said helical tilter has more than one turn disposed around said central rod.
Claim 12
Dependent Claim
25 words
A system for controlling the tilt of a monocontrol Venetian blind in accordance with claim 3 in which said tilter is made of plastic material.
Claim 13
Dependent Claim
103 words
A tilt mechanism for a Venetian blind comprising a helical band brake adapted for rotatable disposition about a central rod, each end of said helical band brake being configured for attachment to one leg of a ladder cord which, by the weight of the blind suspended therefrom, provides a downward tensile load to tighten said helical band brake about said central rod to provide frictional driving force therebetween whenever said helical band brake has an angular orientation in which the tensions in both of said ladder cords tend to increase the angle of wrap of said helical band brake about said central rod.
Claim 14
Dependent Claim
103 words
A tilt mechanism for a Venetian blind comprising a helical band brake adapted for rotatable disposition about a central rod, each end of said helical band brake being configured for attachment to one leg of a ladder cord which, by the weight of the blind suspended therefrom, provides a downward tensile load to tighten said helical band brake about said central rod to provide frictional driving force therebetween whenever said helical band brake has an angular orientation in which the tensions in both of said ladder cords tend to increase the angle of wrap of said helical band brake about said central rod.
Claim 15
Dependent Claim
39 words
A tilt mechanism for a Venetian blind in accordance with claim 11 further including a stop positioned for loosening the grip of said tilter on said rod at the position corresponding to full tilt for either direction of rotation.
Claim 16
Dependent Claim
80 words
A tilt mechanism for a Venetian blind in accordance with claim 11 further including a sleeve of a generally cylindrical shape mounted for rotation with said central rod, said helical band brake being configured to grip said sleeve to rotate therewith when the tensions in said ladder cord legs produce a net component of force in a direction that tends to tighten said helical band brake about said sleeve and to slip when said net component of force is absent.
Claim 17
Dependent Claim
56 words
A tilt mechanism for a Venetian blind in accordance with claim 13 wherein said band brake ends are configured such that said ladder cord legs are positioned beyond the end of said sleeve to provide clearance for said legs to lie closer to the axis to said central rod than the outside radius of said sleeve.
Claim 18
Dependent Claim
61 words
A tilt mechanism for a Venetian blind comprising a central rod and a tilter adapted for rotatable disposition about said central rod, characterized in that said tilter is in the form of a helical band brake having a central portion configured for gripping the central rod and two arms configured for receiving the ends of a pair of ladder cords legs.
Claim 19
Dependent Claim
61 words
A tilt mechanism for a Venetian blind comprising a central rod and a tilter adapted for rotatable disposition about said central rod, characterized in that said tilter is in the form of a helical band brake having a central portion configured for gripping the central rod and two arms configured for receiving the ends of a pair of ladder cords legs.
Claim 20
Dependent Claim
79 words
A tilt mechanism for a venetian blind in accordance with claim 15 wherein each of said ladder cord legs, by the weight of a blind suspended thereby, provides a downward tensile load to tighten said band brake about said central rod to provide frictional driving force therebetween whenever said band brake has an angular orientation in which the tensions in said ladder cord legs tend to increase the angle of wrap of said band brake about said central rod.
Claim 21
Dependent Claim
78 words
A tilt mechanism for a Venetian blind in accordance with claim 16 further including a sleeve of a generally cylindrical shape mounted for rotation with said central rod, said helical band brake configured to grip said sleeve to rotate therewith when the tensions in said ladder cord legs produce a net component of force in a direction that tends to tighten said band brake about said sleeve and to slip when said net component of force is absent.
Claim 22
Dependent Claim
53 words
A tilt mechanism for a Venetian blind in accordance with claim 17 in which said band brake arms axially position said ladder cord legs beyond the end of said sleeve to provide clearance for said legs to lie closer to the axis of said central rod than the outside radius of said sleeve.
Claim 23
Dependent Claim
39 words
A tilt mechanism for a Venetian blind in accordance with claim 18 further incorporating a stop positioned for loosening the grip of said tilter on said rod at the position corresponding to full tilt for either direction of rotation.
Claim 24
Dependent Claim
39 words
A tilt mechanism for a Venetian blind in accordance with claim 16 further incorporating a stop positioned for loosening the grip of said tilter on said rod at the position corresponding to full tilt for either direction of rotation.
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) | 1990-10-05 | 1991-04-06 | 1991-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-05 | 1995-04-06 | 1995-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-05 | 1999-04-06 | 1999-10-06 | $7700.00 | Window Closed / Lapsed |