US4238969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical gearing for roller blinds and awnings
Assignee: Klafft and Kluppelholz
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Filing: 1978-11-20
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Granted: 1980-12-16
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Expires: 1998-11-20
Abstract
Abstract A transmission or mechanical gearing for roller blinds or gates, window shades and awnings or the like, with a self-locking worm gear drive in a two part housing on one end of a shaft and an abutment for limiting of the number of rotations of the shaft in the unwinding direction. The abutment comprises an abutment pinion with the teeth number (n), the abutment pinion meshing with the worm wheel, a locking disc with the tooth number (n-1), the locking disc likewise meshing with the worm wheel, the locking disc being mounted coaxial to the abutment pinion, and an axially moveable abutment pin arranged in the abutment pinion, the abutment pin being prestressed with a spring and by means of a slot in the locking disc is able to engage in a double-sided abutment in the housing.
Inventors
- 👤 Bruno Krause
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:01
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/56; E06B9/68; E06B9/76; E06B9/80; E06B9/82; E06B9/88; E06B2009/6809; E06B2009/6872; E06B2009/6881; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19637; Y10T74/19642; Y10T74/19698; Y10T74/19828
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
177 words
Transmission for roller blinds and awnings with a self-locking worm wheel drive having a worm wheel, comprising a housing formed in two parts, a shaft being mounted in said housing, the worm wheel drive being mounted on an end of said shaft, an abutment means disposed in said housing for limitation of the number of rotations of the shaft in the unwinding direction, said abutment means comprises: an abutment pinion having a number of teeth, said abutment pinion meshing with said worm wheel; a locking disc having a different number of teeth than that of said abutment pinion, said locking disc meshing with said worm wheel, said locking disc and said abutment pinion being mounted coaxial to each other in said housing; an abutment pin axially moveably disposed in said abutment pinion; an abutment secured to said housing; spring means for prestressing said abutment pin, said locking disc being formed with a slot displaceably operatively adjacent said abutment pin, said abutment pin operatively engages said abutment in a predetermined position with said pin extending through said slot.
Claim 2
Dependent Claim
177 words
Transmission for roller blinds and awnings with a self-locking worm wheel drive having a worm wheel, comprising a housing formed in two parts, a shaft being mounted in said housing, the worm wheel drive being mounted on an end of said shaft, an abutment means disposed in said housing for limitation of the number of rotations of the shaft in the unwinding direction, said abutment means comprises: an abutment pinion having a number of teeth, said abutment pinion meshing with said worm wheel; a locking disc having a different number of teeth than that of said abutment pinion, said locking disc meshing with said worm wheel, said locking disc and said abutment pinion being mounted coaxial to each other in said housing; an abutment pin axially moveably disposed in said abutment pinion; an abutment secured to said housing; spring means for prestressing said abutment pin, said locking disc being formed with a slot displaceably operatively adjacent said abutment pin, said abutment pin operatively engages said abutment in a predetermined position with said pin extending through said slot.
Claim 3
Dependent Claim
43 words
The transmission according to claim 1, wherein said housing adjacent said abutment defines inlet and outlet ends, the ends of said slot as well as said inlet and outlet ends are formed with inclined surfaces, said abutment pin slides against said ends, respectively.
Claim 4
Dependent Claim
20 words
The transmission according to claim 1, wherein said abutment on both sides thereof, respectively, is operatively abutable by said pin.
Claim 5
Dependent Claim
20 words
The transmission according to claim 1, wherein said locking disc has one less tooth than that of said abutment pinion.
Claim 6
Dependent Claim
47 words
The transmission according to claim 1, further comprising an axle means for mounting said abutment pinion and said locking disc thereon, said axle means is formed in one-piece with said abutment and is operatively fastened with said abutment in one of said two parts of said housing.
Claim 7
Dependent Claim
67 words
The transmission according to claim 5, wherein said locking disc and said abutment pinion are disposed against one another, said abutment is disposed between said housing and against said locking disc, said abutment constitutes a member extending diametrically relative to said axle by a distance from the center of said axle at least equal to the distance from the center of said axle to said abutment pin.
References Cited (Backward Citations)
US3813958A
Cited
US4055092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |