Patent US3335830A successfully refreshed from Google Patents.
US3335830A
Expired / Lapsed
US
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Methods and devices for automatic transmissions for vehicles
Assignee: Renault SA
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Filing: 1965-03-08
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Granted: 1967-08-15
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Expires: 1985-03-08
Abstract
No abstract record available.
Inventors
- 👤 Castelet Gaetan De Coye De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:19
CPC Classifications
B; B60; B60W; B60W10/00; B60W10/04; B60W10/06; B60W10/10; B60W10/11; B60W30/00; B60W30/18; B60W30/1819; B60W30/19; F; F16; F16H; F16H61/00; F16H61/02; F16H61/0202; F16H61/0204; F16H61/0206; F16H61/68; F16H61/682; F16H63/00; F16H63/40; F16H63/50; F16H63/502; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19377; Y10T74/19414; Y10T74/19419; Y10T74/19423; Y10T74/19428; Y10T74/19437
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A VEHICLE COMPRISING AN ENGINE HAVING A DRIVE SHAFT; A MECHANICAL GEAR BOX HAVING AN INPUT SHAFT, AND OUTPUT SHAFTS, A PLURALITY OF PAIRS OF PINIONS MOUNTED ON SAID SHAFTS AND A SLIDING FORK ADAPTED TO SELECTIVELY OPERATIVELY ENGAGE SAID PINIONS TO DRIVINGLY ENGAGE SAID INPUT SHAFT AND OUTPUT SHAFT AT DIFFERENT SPEED RATIOS; AND ELECTRIC CLUTCH ADAPTED TO DRIVINGLY ENGAGE SAID DRIVE SHAFT AND SAID INPUT SHAFT; AND WHEELS MOUNTED ON SAID OUTPUT SHAFT; WHEREIN THE IMPROVEMENT COMPRISES A TACHOMETRIC MEMBER ARRANGED ON SAID DRIVE SHAFT AND SAID OUTPUT SHAFT AND ADAPTED TO EMIT A SIGNAL IN ACCORDANCE WITH THEIR RESPECTIVE SPEEDS; A SPEED COMPARISON DEVICE RESPONSIVE TO THE SIGNALS RECEIVED FROM SAID TACHOMETRIC DEVICE AND ADAPTED TO EMIT CORRESPONDING OUTPUT SIGNALS; SPEED CONTROL MEANS RESPONSIVE TO SAID OUTPUT SIGNALS FOR CONTROLLING THE SPEED OF SAID ENGINE; AND CLUTCH CONTROL MEANS RESPONSIVE TO SAID OUTPUT SIGNALS FOR CONTROLLING SAID CLUTCH.
Claim 2
Dependent Claim
151 words
A VEHICLE COMPRISING AN ENGINE HAVING A DRIVE SHAFT; A MECHANICAL GEAR BOX HAVING AN INPUT SHAFT, AND OUTPUT SHAFTS, A PLURALITY OF PAIRS OF PINIONS MOUNTED ON SAID SHAFTS AND A SLIDING FORK ADAPTED TO SELECTIVELY OPERATIVELY ENGAGE SAID PINIONS TO DRIVINGLY ENGAGE SAID INPUT SHAFT AND OUTPUT SHAFT AT DIFFERENT SPEED RATIOS; AND ELECTRIC CLUTCH ADAPTED TO DRIVINGLY ENGAGE SAID DRIVE SHAFT AND SAID INPUT SHAFT; AND WHEELS MOUNTED ON SAID OUTPUT SHAFT; WHEREIN THE IMPROVEMENT COMPRISES A TACHOMETRIC MEMBER ARRANGED ON SAID DRIVE SHAFT AND SAID OUTPUT SHAFT AND ADAPTED TO EMIT A SIGNAL IN ACCORDANCE WITH THEIR RESPECTIVE SPEEDS; A SPEED COMPARISON DEVICE RESPONSIVE TO THE SIGNALS RECEIVED FROM SAID TACHOMETRIC DEVICE AND ADAPTED TO EMIT CORRESPONDING OUTPUT SIGNALS; SPEED CONTROL MEANS RESPONSIVE TO SAID OUTPUT SIGNALS FOR CONTROLLING THE SPEED OF SAID ENGINE; AND CLUTCH CONTROL MEANS RESPONSIVE TO SAID OUTPUT SIGNALS FOR CONTROLLING SAID CLUTCH.
References Cited (Backward Citations)
DE1096319B
Cited
US3182778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |