Patent US4294137A successfully refreshed from Google Patents.
US4294137A
Expired / Lapsed
US
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Transmission with variator
Assignee: Renault SA
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Filing: 1979-03-16
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Granted: 1981-10-13
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Expires: 1999-03-16
Abstract
Abstract A transmission with a variator, notably for automotive vehicles, is disclosed. The transmission is constituted by a variator which can be disconnected by engaging a constant-ratio direct drive. The engagement system is an either-or device.
Inventors
- 👤 Jean Piret
- 👤 Michel Jallas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:08
CPC Classifications
F; F16; F16H; F16H37/00; F16H37/02; F16H37/021; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19074; Y10T74/19079; Y10T74/19102
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
131 words
An automotive vehicle transmission having both variable transmission ratios and constant transmission ratios, said transmission being coupled to an automobile engine and comprising: a variator providing a predetermined range of variable transmission ratios and including a primary shaft driven by said engine, a plurality of driving sheaves carried by said primary shaft, a plurality of driven sheaves, and a secondary shaft supporting said driven sheaves; and a constant ratio direct drive located between said engine and said variator and providing a constant transmission ratio different from said predetermined range of variable transmission ratios; wherein the engagement of said constant ratio direct drive releases said variator and the engagement of said variator releases said constant ratio direct drive, whereby said transmission provides an increased range of ratios for a given size variator.
Claim 2
Dependent Claim
131 words
An automotive vehicle transmission having both variable transmission ratios and constant transmission ratios, said transmission being coupled to an automobile engine and comprising: a variator providing a predetermined range of variable transmission ratios and including a primary shaft driven by said engine, a plurality of driving sheaves carried by said primary shaft, a plurality of driven sheaves, and a secondary shaft supporting said driven sheaves; and a constant ratio direct drive located between said engine and said variator and providing a constant transmission ratio different from said predetermined range of variable transmission ratios; wherein the engagement of said constant ratio direct drive releases said variator and the engagement of said variator releases said constant ratio direct drive, whereby said transmission provides an increased range of ratios for a given size variator.
Claim 3
Dependent Claim
133 words
An automotive vehicle transmission having both variable transmission ratios and constant transmission ratios, said transmission being coupled to an automobile engine and comprising: a variator providing a predetermined range of variable transmission ratios and including a primary shaft driven by said engine, a plurality of driving sheaves carried by said primary shaft, a plurality of driven sheaves, and a secondary shaft supporting said driven sheaves; and a constant ratio direct drive having said variator located between it and said engine and providing a constant transmission ratio different from said predetermined range of variable transmission ratios; wherein the engagement of said constant ratio direct drive releases said variator and the engagement of said variator releases said constant ratio direct drive, whereby said transmission provides an increased range of ratios for a given size variator.
Claim 4
Dependent Claim
133 words
An automotive vehicle transmission having both variable transmission ratios and constant transmission ratios, said transmission being coupled to an automobile engine and comprising: a variator providing a predetermined range of variable transmission ratios and including a primary shaft driven by said engine, a plurality of driving sheaves carried by said primary shaft, a plurality of driven sheaves, and a secondary shaft supporting said driven sheaves; and a constant ratio direct drive having said variator located between it and said engine and providing a constant transmission ratio different from said predetermined range of variable transmission ratios; wherein the engagement of said constant ratio direct drive releases said variator and the engagement of said variator releases said constant ratio direct drive, whereby said transmission provides an increased range of ratios for a given size variator.
Claim 5
Dependent Claim
40 words
A transmission in accordance with claim 1 or 2 wherein said engagement is provided by an engagement system comprising a double clutch with two coaxial driven shafts, said driven shafts permitting the passage of a central coaxial pump driving shaft.
Claim 6
Dependent Claim
28 words
A transmission in accordance with claim 1 or 2 wherein said constant-ratio direct drive is constituted by two gear wheels and a chain connecting said two gear wheels.
Claim 7
Dependent Claim
23 words
A transmission in accordance with claim 1 or 2 wherein said constant-ratio direct drive comprises a receiving gear wheel including a free wheel.
Claim 8
Dependent Claim
14 words
A transmission in accordance with claim 5, wherein said free wheel includes a clutch.
Claim 9
Dependent Claim
25 words
A transmission in accordance with claim 3 wherein said variator includes on its secondary shaft a clutch connecting said driven sheave to said secondary shaft.
References Cited (Backward Citations)
FR1173510A
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FR1219000A
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FR1268226A
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US3257867A
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FR1432631A
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US3686967A
Cited
US3968704A
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GB2025545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |