Automatic transmission apparatus
Abstract
Abstract A VALVE IS PROVIDED TO CONTROL THE SELECTIVE SUPPLY OF AN OPERATING PRESSURE FLUID TO FIRST AND SECOND FRICTION CLUTCHES WHICH RESPECTIVELY CONTROL THE OPERATION OF LOW SPEED AND A HIGH SPEED TRANSMISSION SYSTEM OF A SPEED CHANGE MECHANISM. THE VALVE IS DISPLACEABLE BETWEEN FIRST AND SECOND POSITIONS AND IS SUBJECT TO PRESSURE FLUID AT ITS OPPOSITE ENDS, THE PRESSURE OF THE FLUID AT ONE END BEING RELATED TO ENGINE OUTPUT POWER AND THE PRESSURE OF THE FLUID AT THE OTHER END BEING RELATED TO THE SPEED OF AN OUTPUT SHAFT OF THE TRANSMISSION SYSTEM. WHEN THE VALVE IS IN THE FIRST POSITION, ONE CLUTCH IS ACTIVATED WHEREAS WHEN THE VALVE IS IN ITS SECOND POSITION THE OTHER CLUTCH IS ACTIVATED.
Inventors
- 👤 Akira Akima
- 👤 Kazuyoshi Yoshida
- 👤 Tomio Oguma
Bibliographic Details
Claims Analysis
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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) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |