US3860056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical blind
Assignee: Franciaflex SAS
•
Filing: 1974-01-16
•
Granted: 1975-01-14
•
Expires: 1994-01-16
Abstract
Abstract A window blind comprising a horizontal section carrying and guiding displaceable carriages each of which supports a slat by means of a pivotable hook connected to a vertical pinion arranged to mesh with a horizontal worm screw, wherein each said hook is connected to a circular pivotable member separate from the respective pinion and arranged and adapted to co-operate with the latter by means of cam surfaces disposed in a plane at right angles to the pivot axis, the pinion being urged by a spring towards the position in which it co-operates with and thus drives the said pivotable member, the latter having arrestor stops for co-operating with a stationary radial cog.
Inventors
- 👤 Paul Bruneau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:54
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/36; E06B9/362; Y; Y10; Y10S; Y10S160/00; Y10S160/90
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
110 words
A window blind comprising a horizontal section carrying and guiding displaceable carriages each of which supports a slat by means of a pivotable hook connected to a vertical pinion arranged to mesh with a horizontal worm screw, wherein each said hook is connected to a circular pivotable member separate from the respective pinion and adapted to co-operate with the latter by means of cam surfaces disposed in a plane at right angles to the pivot axis, the pinion being urged by a spring towards the position in which it co-operates with and thus drives the said pivotable member, the latter having arrestor stops for cooperating with a stationery radial cog.
Claim 2
Dependent Claim
110 words
A window blind comprising a horizontal section carrying and guiding displaceable carriages each of which supports a slat by means of a pivotable hook connected to a vertical pinion arranged to mesh with a horizontal worm screw, wherein each said hook is connected to a circular pivotable member separate from the respective pinion and adapted to co-operate with the latter by means of cam surfaces disposed in a plane at right angles to the pivot axis, the pinion being urged by a spring towards the position in which it co-operates with and thus drives the said pivotable member, the latter having arrestor stops for cooperating with a stationery radial cog.
Claim 3
Dependent Claim
68 words
A window blind as claimed in claim 1, wherein each cam surface comprises a circular shoulder having two diametrically opposite projections and two diametrically opposite seats situated between the said projections and offset by 90* with respect to the latter, the projections and seats on each pivotable member being arranged and adapted to engage the seats and projections respectively of the cam surface of the respective associated pinion.
Claim 4
Dependent Claim
53 words
A window blind as claimed in claim 1 wherein the pivotable member is situated within a well which forms part of the carriage and acts as its pivoting guide, the said cog being situated in the bottom of the well, the said bottom of the well having an axial passage for the hook.
Claim 5
Dependent Claim
42 words
A window blind as claimed in claim 1 wherein the hook comprises a vertical shank of non-circular cross-section which passes through an axial hole of identical cross-section situated in the said pivotable member and through a circular axial passage in the pinion.
Claim 6
Dependent Claim
75 words
A window blind as claimed in claim 1 wherein the pinion is externally equipped with a hollow barrel provided with an internal shoulder on which is supported the said spring arranged around the shank of the hook and compressed axially by a cap retained by means of lugs or the like integral with the upper extremity of the shank of the hook, the hollow barrel being situated within a stationary well integral with the carriage.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |