US4060010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction gear, especially for camera lens motors
Assignee: Individual
•
Filing: 1975-09-25
•
Granted: 1977-11-29
•
Expires: 1995-09-25
Abstract
Abstract A camera lens drive comprises a small electric motor and a transmission for driving a lens part. The transmission is formed solely by a number of planetary gear sets arranged in series. The planetary gears are ball bearings having adjustable prestressing. The prestress of a group of input sets is adjustable independently of the prestress of a group of output sets.
Inventors
- 👤 Bjorn Harald Heden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:03
CPC Classifications
F; F16; F16H; F16H13/00; F16H13/06; F16H13/10; G; G02; G02B; G02B7/00; G02B7/02; G02B7/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
177 words
A transmission for a camera lens motor, comprising a. a transmission housing; b. a motor adjacent to the housing; c. an input shaft driven by the motor; d. an output shaft for driving a lens part; e. a reduction gear means between the input and output shafts; f. the reduction gear means comprising at least two friction planetary gear sets arranged axially in series, and divided into first and second groups; the first said group being arranged on the transmission input side and the second said group on the transmission output side, each of said groups comprising at least one planetary gear set; h. variable slip clutch means associated with at least one planetary gear set of said second group and with said output shaft for setting a predetermined maximum torque on said output shaft; and i. separate means associated with a planetary gear set of said first group and with said input shaft for setting a predetermined maximum torque on said input shaft, whereby pre-stressing of each of said first and second groups is independently adjustable.
Claim 2
Dependent Claim
177 words
A transmission for a camera lens motor, comprising a. a transmission housing; b. a motor adjacent to the housing; c. an input shaft driven by the motor; d. an output shaft for driving a lens part; e. a reduction gear means between the input and output shafts; f. the reduction gear means comprising at least two friction planetary gear sets arranged axially in series, and divided into first and second groups; the first said group being arranged on the transmission input side and the second said group on the transmission output side, each of said groups comprising at least one planetary gear set; h. variable slip clutch means associated with at least one planetary gear set of said second group and with said output shaft for setting a predetermined maximum torque on said output shaft; and i. separate means associated with a planetary gear set of said first group and with said input shaft for setting a predetermined maximum torque on said input shaft, whereby pre-stressing of each of said first and second groups is independently adjustable.
Claim 3
Dependent Claim
73 words
A transmission according to claim 1, including a bore in the transmission housing, the axially movable internal gear halves being arranged in the bore, said variable slip clutch means and said separate means each said comprising members axially movable in an end wall of said housing, said members being axially adjustable from the exterior of each said end wall so as to influence the internal gear half located closest to such end wall.
Claim 4
Dependent Claim
22 words
A transmission according to claim 2, including a prestressing spring between each of the adjustment members and the associated movable gear half.
Claim 5
Dependent Claim
56 words
A transmission according to claim 2, including a disc for collectively adjusting the adjustment members, the disc cooperating with parts of said members which project outside of the respective end wall, said disc forming part of a cap threaded onto the transmission housing, whereby the disc is axially movable for axial advancement of said adjustment members.
Claim 6
Dependent Claim
25 words
A transmission according to claim 4, wherein the adjustment members are pins slidably guided in and extending through axial bores in the respective end wall.
Claim 7
Dependent Claim
147 words
A transmission according to claim 1, each of said planetary gear sets having an internal gear, a sun gear, a carrier having gears rotatably mounted thereon and coacting with said sun gear and said internal gear, said internal gears being non-rotatably positioned in the transmission housing, the carrier of one planetary gear set forming an input shaft acting as a sun gear of the next succeeding planetary gear set, the internal gear of at least two adjacent planetary gear sets being divided into two halves, the adjacent internal gear halves of two adjacent planetary gear sets belonging to said first and second groups, respectively, being immovable toward each other, the other, non-adjacent internal gear halves of said adjacent planetary gear sets facing away from each other being axially movable independently of each other, under the influence of said variable slip clutch means and said separate means, respectively.
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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) | 1980-11-28 | 1981-05-30 | 1981-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-28 | 1985-05-30 | 1985-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-28 | 1989-05-30 | 1989-11-29 | $7700.00 | Window Closed / Lapsed |