US4719955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blind
Assignee: Tachikawa Corp
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Filing: 1986-06-16
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Granted: 1988-01-19
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Expires: 2006-06-16
Abstract
Abstract Relates to a blind, comprising a head box, an operating rod dropped from one side of the head box, an angle control shaft in the head box which is driven to rotate by the operating rod, a multiplicity of slats controlled for angle by rotations of the angle control shaft, a slat angle controller having a gear mechanism provided between the operating rod and the angle control shaft, the gear mechanism comprising a first gear shaft extending diagonally in section of the head box, a second gear shaft extending longitudinally of the head box, and gears coupling the first and second gear shafts.
Inventors
- 👤 Koui Tachikawa
- 👤 Yuuichi Miura
- 👤 Masaharu Kawashima
- 👤 Satoru Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:59
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/28; E06B9/30; E06B9/303; E06B9/307; E06B9/32; E06B9/323; E06B9/324; E06B9/38; E06B9/388; E06B2009/285
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
161 words
A blind, comprising: (a) a head box; (b) an operating rod extending outwardly from one side of said head box; (c) an angle control shaft in said head box which is driven to rotate by said operating rod; (d) a multiplicity of slats controlled for angle by rotations of said angle control shaft; (e) a slat angle controller having a gear mechanism provided between said operating rod and angle control shaft, said gear mechanism comprising a first gear shaft provided with a first gear and extending diagonally insection of said head box, a second gear shaft provided with a second gear, said second shaft being coupled to said angle control shaft and extending longitudinally of said head box, the diagonal extension of said first gear shaft permitting the first gear provided thereupon to be disposed non-interferingly between said second gear and a corner of said head box with said first and second gears meshing so as to couple the gear shafts.
Claim 2
Dependent Claim
161 words
A blind, comprising: (a) a head box; (b) an operating rod extending outwardly from one side of said head box; (c) an angle control shaft in said head box which is driven to rotate by said operating rod; (d) a multiplicity of slats controlled for angle by rotations of said angle control shaft; (e) a slat angle controller having a gear mechanism provided between said operating rod and angle control shaft, said gear mechanism comprising a first gear shaft provided with a first gear and extending diagonally insection of said head box, a second gear shaft provided with a second gear, said second shaft being coupled to said angle control shaft and extending longitudinally of said head box, the diagonal extension of said first gear shaft permitting the first gear provided thereupon to be disposed non-interferingly between said second gear and a corner of said head box with said first and second gears meshing so as to couple the gear shafts.
Claim 3
Dependent Claim
17 words
The blind as defined in claim 1, further comprising a case for enclosing said gear mechanism therein.
Claim 4
Dependent Claim
83 words
The blind as defined in claim 2, wherein said second gear shaft has its base end portion extending outwardly of said gear case, and further comprising a support plate fixed on said base end of said second gear shaft, and a coil spring disposed between said support plate and said case, said coil spring urging said second gear shaft and the support plate fixed thereupon away from said gear case, thereby constantly urging said second gear into frictional engagement with said gear case.
Claim 5
Dependent Claim
87 words
The blind as defined in claim 2, further comprising a mounting hole provided on said head box; a front side of said case protruding forwardly to define a fitting projection, said case being installed in the head box with the fitting projection extending outwardly through said mounting hole, said fitting projection being provided with a mounting groove at a position along an outside surface of the head box; and a cap for fixing said case while coming in contact with an outer surface of said head box.
Claim 6
Dependent Claim
12 words
The blind as defined in claim 4, said gears being bevel gears.
Claim 7
Dependent Claim
30 words
The blind as defined in claim 5, wherein the bevel gear for the first gear shaft is positioned on a bevel of the bevel gear for the second gear shaft.
Claim 8
Dependent Claim
27 words
The blind as defined in claim 4, wherein said cap is formed hollowly and provided with a projection engagable with said mounting groove on the back thereof.
Claim 9
Dependent Claim
23 words
The blind as defined in claim 4, wherein said cap is tinged with a color in harmony with said head box and slats.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-18 | 1991-07-20 | 1992-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-18 | 1995-07-20 | 1996-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-18 | 1999-07-20 | 2000-01-19 | $7700.00 | Window Closed / Lapsed |