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US3552227A
Expired / Lapsed
US
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Shift control mechanism for dual rail transmission
Assignee: Navistar International Corp
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Filing: 1968-10-07
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Granted: 1971-01-05
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Expires: 1988-10-07
Abstract
Abstract A SINGLE LEVER ACTUATED SHIFT CONTROL MECHANISM FOR SELECTIVELY EFFECTING THE ENGAGEMENT AND DISENGAGEMENT OF A TRANSMISSION FOR A FOUR WHEEL DRIVE VEHICLE. THE MECHANISM INCLUDES A PAIR OF GEAR CONTROLLING RAILS WHICH ARE MOVED LONGITUDINALLY EITHER INDIVUALLY OR TOGETHER TO ESTABLISH A NEUTRAL CONDITION, A LOW SPEED FORWARD DRIVE TO ALL FOUR WHEELS AND A HIGH SPEED FORWARD DRIVE TO ALL FOUR WHEELS OR TO ONLY TWO OF THE WHEELS. THE VARIOUS RATIOS ARE SELECTED PURELY BY THE FORE AND AFT MOVEMENT OF THE SHIFT LEVER.
Inventors
- 👤 Ronald C Schroeder
- 👤 Robert L Dowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:47
CPC Classifications
B; B60; B60K; B60K17/00; B60K17/34; B60K17/344; B60K17/348; B60K17/35; B60K17/352; G; G05; G05G; G05G9/00; G05G9/08; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20012; Y10T74/20018; Y10T74/20085; Y10T74/20104
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |