US3710635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Harmonic differential sprocket
Assignee: Individual
•
Filing: 1971-01-15
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Granted: 1973-01-16
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Expires: 1991-01-15
Abstract
Abstract A reduction drive assembly for driving a chain or circular drum having a plurality of circular roller elements and including a shaft having first and second opposite disposed offset eccentrics with the first gear movably mounted on the first eccentric and a second gear movably mounted on the second eccentric with the gears having guide holes therein and guide pins extending between a pair of plates and through the guide holes for controlling the relative rotation between the gears. The novelty in the assembly resides in the configuration of the periphery of the gears, i.e., the tooth shape, as defined mathematically in terms of x and y coordinates with the x and y axes passing through the center of the gear. The gears are also novel in that the guide holes extending through the gears are disposed on centers located relative to the crown of a gear tooth and the adjacent root or throat.
Inventors
- 👤 R Whitehorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:54
CPC Classifications
F; F16; F16H; F16H7/00; F16H7/06; Y; Y10; Y10S; Y10S475/00; Y10S475/904
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
A gear of the type utilized in a drive assembly having at least two such gears disposed on offset eccentrics for engaging a member having circular elements to engage the gears, said gear having a peripheral contour defined from the center of the gear by the coordinates where: p0 is the pitch radius of the member to be engaged and driven by the teeth; q is the number of teeth in the driven member and is also the ratio of the gearing; M is the number of lengths into which the arc of movement of the circular elements is divided; and N is the number of the length.
Claim 2
Dependent Claim
108 words
A gear of the type utilized in a drive assembly having at least two such gears disposed on offset eccentrics for engaging a member having circular elements to engage the gears, said gear having a peripheral contour defined from the center of the gear by the coordinates where: p0 is the pitch radius of the member to be engaged and driven by the teeth; q is the number of teeth in the driven member and is also the ratio of the gearing; M is the number of lengths into which the arc of movement of the circular elements is divided; and N is the number of the length.
Claim 3
Dependent Claim
63 words
A gear as set forth in claim 1 including a plurality of guide holes extending through the gear about the center thereof, at least one guide hole having a center disposed on a bisector of two radials one of which extends through the center of a tooth and the other of which extends through the center of the root adjacent to said tooth.
Claim 4
Dependent Claim
153 words
In a drive assembly of the type for driving a driven member with a plurality of circular elements and including a shaft having first and second eccentrics with a first gear movably disposed on said first eccentric and a second gear movably disposed on said second eccentric adjacent said first gear and control means outwardly of said gears and guide means supported by said control means and extending through said gears for controlling the relative rotation between said gears, the improvement comprising said first and second gears having peripheral contours defined from the respective centers thereof by the coordinates where: p0 is the pitch radius of the driven member, q is the number of teeth on the driven member and is also the ratio of the gearing, M is the number of lengths into which the arc of movement of the circular elements is divided, and N is the number of the length.
Claim 5
Dependent Claim
153 words
In a drive assembly of the type for driving a driven member with a plurality of circular elements and including a shaft having first and second eccentrics with a first gear movably disposed on said first eccentric and a second gear movably disposed on said second eccentric adjacent said first gear and control means outwardly of said gears and guide means supported by said control means and extending through said gears for controlling the relative rotation between said gears, the improvement comprising said first and second gears having peripheral contours defined from the respective centers thereof by the coordinates where: p0 is the pitch radius of the driven member, q is the number of teeth on the driven member and is also the ratio of the gearing, M is the number of lengths into which the arc of movement of the circular elements is divided, and N is the number of the length.
Claim 6
Dependent Claim
71 words
In an assembly as set forth in claim 3 wherein each gear includes a plurality of guide holes extending therethrough about the center thereof through which said guide means extend, at least one guide hole having a center disposed on a bisector of two radials one of which extends through the center of a tooth and the other of which extends through the center of the root adjacent to said tooth.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |