Patent US3564848A successfully refreshed from Google Patents.
US3564848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steering equipment particularly for heavy vehicles
Assignee: Danfoss AS
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Filing: 1969-05-08
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Granted: 1971-02-23
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Expires: 1989-05-08
Abstract
Abstract THE INVENTION RELATES TO A HYDROSTATIC STEERING SYSTEM FOR HEAVY VEHICLES. THE SYSTEM COMPRISES DUAL UNITS IN SERIES WITH ONE UNIT BEING A WORKING UNIT AND THE OTHER UNIT BEING A CONTROL UNIT. EACH UNIT INCORPORATES CHANGEOVER AND SHUT-OFF VALVE MEANS AND METERING MEANS. A STEERING WHEEL ACTUATES THE CONTROL UNIT AND THE METERING MEANS OF THE CONTROL UNIT ACTUATES A CONTROL MOTOR WHICH IN TURN ACTUATES THE METERING MEANS OF THE WORKING UNIT. THE METERING MEANS OF THE WORKING UNIT ACTUATES A WORKING MOTOR CONNECTED TO THE STEERING LINKAGE OF THE VEHICLE.
Inventors
- 👤 Johannes Vagn Baatrup
- 👤 Vagn S L Bender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:45
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/06; B62D5/09; B62D5/093; B62D5/097
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |