US4485687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary transmission
Assignee: Whitnash PLC
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Filing: 1982-06-08
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Granted: 1984-12-04
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Expires: 2002-06-08
Abstract
Abstract A rotary transmission is of the dual clutch kind and includes three gear trains through which the clutches providing alternative drive paths between a common input shaft and a common output shaft. One clutch drives the output shaft either through a two-wheel gear train or through a three-wheel train of which the first wheel is a gear wheel driven directly from the input shaft, the second wheel is a gear wheel interengaged with the first wheel and journalled on the output shaft and the third wheel is a sleeve wheel journalled on and engageable with the output shaft so that the second wheel drives the output shaft through the sleeve wheel. The other clutch is arranged to drive the output shaft either through a two-wheel gear train of which the second gear wheel is provided by the sleeve wheel or through a six-wheel gear train of which all the gear wheels are members of the first, second and third mentioned trains. In another embodiment said one clutch drives the output shaft through a second two wheel gear train which forms part of the six wheel gear train.
Inventors
- 👤 John P. Burke
- 👤 Alastair J. Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:24
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/006; F16H3/02; F16H3/08; F16H3/087; F16H3/089; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19228; Y10T74/19242; Y10T74/19377; Y10T74/19386; Y10T74/19391; Y10T74/19395; Y10T74/19405
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
217 words
A rotary transmission comprising first, second and third gear trains each being one of a set providing a series of increasing speed ratios two clutches independently operable and providing alternative drive paths through the first, second and third gear trains, a common input shaft for the clutches and a common output shaft to which drive from the input shaft is transmitted by the transmission, the gear trains of alternative ratios in the set being driven respectively through one and the other clutch, one said clutch being arranged to drive the output shaft either through a two-wheel gear train or through a three-wheel train of which the first wheel is a gear wheel driven directly from the input shaft, the second wheel is a gear wheel interengaged with the first wheel and journalled on the output shaft and the third wheel is a sleeve wheel journalled on and engageable with the output shaft so that the second wheel drives the output shaft through the sleeve wheel, and the said other clutch being arranged to drive the output shaft either through a two-wheel gear train of which the second gear wheel is provided by the sleeve wheel or through a six-wheel gear train of which all the gear wheels are members of the first, second and third mentioned trains.
Claim 2
Dependent Claim
217 words
A rotary transmission comprising first, second and third gear trains each being one of a set providing a series of increasing speed ratios two clutches independently operable and providing alternative drive paths through the first, second and third gear trains, a common input shaft for the clutches and a common output shaft to which drive from the input shaft is transmitted by the transmission, the gear trains of alternative ratios in the set being driven respectively through one and the other clutch, one said clutch being arranged to drive the output shaft either through a two-wheel gear train or through a three-wheel train of which the first wheel is a gear wheel driven directly from the input shaft, the second wheel is a gear wheel interengaged with the first wheel and journalled on the output shaft and the third wheel is a sleeve wheel journalled on and engageable with the output shaft so that the second wheel drives the output shaft through the sleeve wheel, and the said other clutch being arranged to drive the output shaft either through a two-wheel gear train of which the second gear wheel is provided by the sleeve wheel or through a six-wheel gear train of which all the gear wheels are members of the first, second and third mentioned trains.
Claim 3
Dependent Claim
24 words
A rotary transmission according to claim 1, in which the said clutches are arranged one at each side of the set of gear trains.
Claim 4
Dependent Claim
34 words
A rotary transmission according to claim 2, in which driving gears are provided for said first, second and third mentioned trains, said driving gears being journalled on a common driving shaft for said clutches.
Claim 5
Dependent Claim
33 words
A rotary transmission according to claim 3, in which the two wheel gear train and three wheel train driven through said one clutch have respective driving gear wheels fast for rotation in common.
Claim 6
Dependent Claim
45 words
A rotary transmission according to claim 1 in which the two wheel gear train which is driven through the said one clutch includes a driven gear journalled on the output shaft, selector means being provided for drivably connecting the driven gear to the output shaft.
Claim 7
Dependent Claim
55 words
A rotary transmission according to claim 5 in which the said second wheel of the said three wheel train is journalled on the output shaft between the sleeve wheel and the selector means for drivably connecting to the output shaft the driven gear of the two-wheel gear train which is driven through said one clutch.
Claim 8
Dependent Claim
37 words
A rotary transmission according to claim 1 in which the sleeve wheel is arranged between the second wheel of the said three wheel train and selector means for drivably connecting the sleeve wheel to the output shaft.
Claim 9
Dependent Claim
169 words
A rotary transmission having first, second and third gear trains each being one of a set providing a series of increasing speed ratios and two clutches independently operable and providing alternative drive paths through the first, second and third gear trains between a common input shaft and a common output shaft, the gear trains of alternative ratios in the set being driven respectively through one and the other clutch, characterized in that one clutch is arranged to drive the output shaft through a first two-wheel gear train or through a second two-wheel train, and the other clutch is arranged to drive the output shaft either through a two-wheel gear train of which the second gear wheel is provided by a sleeve wheel journalled on the output shaft and engageable either with the output shaft or with the second gear wheel of said second two wheel gear train, or through a six-wheel gear train of which all the gear wheels are members of the first, second and third mentioned trains.
Claim 10
Dependent Claim
169 words
A rotary transmission having first, second and third gear trains each being one of a set providing a series of increasing speed ratios and two clutches independently operable and providing alternative drive paths through the first, second and third gear trains between a common input shaft and a common output shaft, the gear trains of alternative ratios in the set being driven respectively through one and the other clutch, characterized in that one clutch is arranged to drive the output shaft through a first two-wheel gear train or through a second two-wheel train, and the other clutch is arranged to drive the output shaft either through a two-wheel gear train of which the second gear wheel is provided by a sleeve wheel journalled on the output shaft and engageable either with the output shaft or with the second gear wheel of said second two wheel gear train, or through a six-wheel gear train of which all the gear wheels are members of the first, second and third mentioned trains.
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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) | 1987-12-04 | 1988-06-04 | 1988-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-04 | 1992-06-04 | 1992-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-04 | 1996-06-04 | 1996-12-04 | $7700.00 | Window Closed / Lapsed |