US4235129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed reduction mechanism
Assignee: Individual
•
Filing: 1978-03-30
•
Granted: 1980-11-25
•
Expires: 1998-03-30
Abstract
Abstract A first drive element of a speed changer is rotatably supported in front of and coaxial with a stationary support, and a second drive element is rotatably supported by and coaxial with the stationary support. An intermediate disc is eccentrically mounted on the first drive element for transmitting rotary motion between the first and second drive elements; guiding and locking devices are connected with the support for locking the intermediate disc against rotation and for mounting it for movement in a closed circular path corresponding to the eccentric mounting of the intermediate disc; an inner gear is rigidly mounted on and coaxial with the intermediate disc and has external teeth; and an outer gear is rigidly mounted on and coaxial with the second drive element, surrounding the inner gear and having internal teeth in greater number than the external ones, for consecutive meshing engagements between the internal and external teeth.
Inventors
- 👤 Isamu Takasu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:00
CPC Classifications
F; F16; F16H; F16H1/00; F16H1/28; F16H1/32; F16H37/00; F16H37/02; F16H37/021; F16H37/022
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
225 words
A speed reducer comprising: a stationary support having a central bore and a flange-like disc surrounding said central bore, a driven element rotatably supported in said central bore of said stationary support and comprising a shaft, an annular flange projecting from said shaft and an annular first gear with internal teeth on said flange, a driving element surrounding said driven element and rotatably supported coaxially with said driven element, said driving element comprising a disc, an annular flange supported by said disc, and an eccentric inwardly of said annular flange, a floating disc having a central spring in which said eccentric is rotatable and carrying a second gear with external teeth disposed inside said first gear, said second gear being smaller than said first gear and having fewer teeth, and means on said stationary support for restraining rotation of said floating disc while permitting its orbital movement by said eccentric, the eccentricity of said eccentric being such as to bring said second gear into mesh with said first gear at one location in its periphery, whereby orbital movement is imparted to said floating disc by rotation of said driving element to bring teeth of said second gear into mesh with teeth of said first gear progressively around the peripheries of said gears to drive said first gear and said driven element at a reduced speed.
Claim 2
Dependent Claim
225 words
A speed reducer comprising: a stationary support having a central bore and a flange-like disc surrounding said central bore, a driven element rotatably supported in said central bore of said stationary support and comprising a shaft, an annular flange projecting from said shaft and an annular first gear with internal teeth on said flange, a driving element surrounding said driven element and rotatably supported coaxially with said driven element, said driving element comprising a disc, an annular flange supported by said disc, and an eccentric inwardly of said annular flange, a floating disc having a central spring in which said eccentric is rotatable and carrying a second gear with external teeth disposed inside said first gear, said second gear being smaller than said first gear and having fewer teeth, and means on said stationary support for restraining rotation of said floating disc while permitting its orbital movement by said eccentric, the eccentricity of said eccentric being such as to bring said second gear into mesh with said first gear at one location in its periphery, whereby orbital movement is imparted to said floating disc by rotation of said driving element to bring teeth of said second gear into mesh with teeth of said first gear progressively around the peripheries of said gears to drive said first gear and said driven element at a reduced speed.
Claim 3
Dependent Claim
24 words
A speed reducer according to claim 1, in which said driving element is a pulley, said flange providing a belt-receiving circumference of said pulley.
Claim 4
Dependent Claim
25 words
A speed reducer according to claim 1, in which said floating disc is disposed in space surrounded by said annular flange of said driving element.
Claim 5
Dependent Claim
32 words
A speed reducer according to claim 1, in which said means for restraining rotation of said floating disc comprises pins on said stationary support received loosely in openings in said floating disc.
Claim 6
Dependent Claim
21 words
A speed reducer according to claim 1, in which said floating disc is mounted on said eccentric with an anti-friction bearing.
Claim 7
Dependent Claim
25 words
A speed reducer according to claim 1, in which said drawing element is rotatably supported by anti-friction bearings on said shaft of said driven element.
Claim 8
Dependent Claim
30 words
A speed reducer according to claim 1, in which the overall length of said speed reducer is about twice the axial extent of said driving element including said annular flange.
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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) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |