Patent US3572213A successfully refreshed from Google Patents.
US3572213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic control system
Assignee: Eaton Corp
•
Filing: 1969-05-12
•
Granted: 1971-03-23
•
Expires: 1989-05-12
Abstract
Abstract A HYDRAULIC CONTROL SYSTEM FOR A VEHICLE INCLUDES A MASTER CONTROL VALVE WHICH IS OPERATED BY A MANUAL CONTROL TO CONTROL THE FLOW OF HYDRAULIC FLUID TO A FLUID PRESSURE CYLINDER WHICH OPERATES TO CONTROL THE SWASH OF THE HYDROSTATIC TRANSMISSION. AN ANTI-STALL CONTROL IS INCLUDED IN THE SYSTEM AND OPERATES TO REDUCE THE PRESSURE IN THE PRESSURE CYLINDER AND THEREBY EFFECT A DE-SWASH OF THE HYDROSTATIC TRANSMISSION WHEN THE VEHICLE IN WHICH THE SYSTEM IS INCORPORATED ENCOUNTERS A STALL CONDITION. THE SYSTEM FURTHER INCLUDES A CONTROL FOR SLOWING THE INCREASE IN PRESSURE IN THE PRESSURE CYLINDER AFTER THE STALL CONDITION HAS BEEN ALLEVIATED.
Inventors
- 👤 Robert B Lauck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:02
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/46; F16H61/472
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-03-22 | 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 |