Patent US4487243A successfully refreshed from Google Patents.
US4487243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Venetian blind
Assignee: Levolor Corp
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Filing: 1982-05-21
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Granted: 1984-12-11
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Expires: 2002-05-21
Abstract
Abstract A venetian blind with a very low head channel and narrow slats, having a lift cord lock, a tilter, and cradles, all of which can simply be snapped in place in the head channel. The cord lock has an integral, one-piece sheet metal housing. The tilter has a plastic housing open at the top through which the gear and worm shaft can be introduced before being closed with a cover. The blind has drums forming plastic sleeves split to fit over the tilt rod and with slits for receiving barbed end portions of ladders for suspending the slats. The lower ends of the ladders and of the lift cord are fastened to the bottom rail of the blind by button-like plastic caps.
Inventors
- 👤 Victor Debs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:59
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/28; E06B9/30; E06B9/303; E06B9/307; E06B9/32; E06B9/323; E06B9/38; E06B9/388; E06B2009/285
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
277 words
A venetian blind having a head channel with side walls and flanges extending inwardly from said side walls, a plurality of slats, means provided in said head channel for suspending said slats from said head channel, means provided in said head channel for lifting and lowering said slats, and means associated with said head channel for tilting said slats from essentially horizontal positions to tilted positions and vice versa, said tilting means including: a housing placed in said head channel, said housing being a unitary molded piece of plastic open at the top and having a bottom wall, and a side wall having a portion inclined at an angle with respect to said bottom wall, a worm gear inserted into said housing from said top and rotatably supported in said housing, a tilt rod extending through said worm gear and rotatably mounted in said head channel and held in fixed rotational relationship thereto, and a worm shaft inserted into said housing from the top and supported by said side wall portion and having a worm in meshing engagement with said worm gear, said worm shaft being provided with a groove extending essentially longitudinally over the entire length thereof, said groove permitting said worm shaft to be inserted from the top of said housing by accommodating the teeth of said gear during insertion until the teeth of the worm mesh with the teeth of the worm gear, and a separate cover placed on said open top of said housing for holding said gear shaft in place when said housing is placed in said head and said cover is clamped between said top of said housing and said flanges.
Claim 2
Dependent Claim
277 words
A venetian blind having a head channel with side walls and flanges extending inwardly from said side walls, a plurality of slats, means provided in said head channel for suspending said slats from said head channel, means provided in said head channel for lifting and lowering said slats, and means associated with said head channel for tilting said slats from essentially horizontal positions to tilted positions and vice versa, said tilting means including: a housing placed in said head channel, said housing being a unitary molded piece of plastic open at the top and having a bottom wall, and a side wall having a portion inclined at an angle with respect to said bottom wall, a worm gear inserted into said housing from said top and rotatably supported in said housing, a tilt rod extending through said worm gear and rotatably mounted in said head channel and held in fixed rotational relationship thereto, and a worm shaft inserted into said housing from the top and supported by said side wall portion and having a worm in meshing engagement with said worm gear, said worm shaft being provided with a groove extending essentially longitudinally over the entire length thereof, said groove permitting said worm shaft to be inserted from the top of said housing by accommodating the teeth of said gear during insertion until the teeth of the worm mesh with the teeth of the worm gear, and a separate cover placed on said open top of said housing for holding said gear shaft in place when said housing is placed in said head and said cover is clamped between said top of said housing and said flanges.
Claim 3
Dependent Claim
51 words
The venetian blind according to claim 1, wherein said head channel is provided with an essentially rectangular opening, the bottom wall of said housing being provided with a lip resting against an edge defining said opening, and said worm shaft extending through said opening to the outside of said head channel.
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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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |