US3123167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
D lichti
Assignee: —
•
Filing: —
•
Granted: 1964-03-03
•
Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:32
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/30; B64F1/305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A SPEED CONTROL AND STEERING SYSTEM FOR A SELFPROPELLED STEERABLE VEHICLE WHICH INCLUDES A FRAME PIVOTABLE ABOUT A VERTICAL AXIS, TWO WHEELS ROTATABLY MOUNTED ON SAID FRAME ON OPPOSITE SIDES OF SAID VERTICAL AXIS, AND TWO REVERSIBLE MOTORS MOUNTED ON SAID FRAME AND RESPECTIVELY CONNECTED TO SAID WHEELS IN DRIVING RELATIONS THEREWITH, THE COMBINATION OF: TWO BRIDGE CIRCUITS RESPECTIVELY OPERATIVELY CONNECTED TO SAID MOTORS FOR CONTROLLING THE RESPECTIVE SPEEDS THEREOF; SPEED CONTROL MEANS COMMON TO AND FORMING PARTS OF SAID BRIDGE CIRCUITS FOR SIMULTANEOUSLY AND EQUALLY UNBALANCING SAID BRIDGE CIRCUITS IN THE SAME DIRECTIONS TO SIMULTANEOULSY AND EQUALLY VARY THE SPEEDS OF SAID MOTORS IN THE SAME DIRECTIONS; AND STEERING MEANS FOR RELATIVELY UNBALANCING SAID BRIDGE CIRCUITS IN OPPOSITE DIRECTIONS SO AS TO VARY THE RELATIVE SPEEDS OF SAID MOTORS.
Claim 2
Dependent Claim
131 words
IN A SPEED CONTROL AND STEERING SYSTEM FOR A SELFPROPELLED STEERABLE VEHICLE WHICH INCLUDES A FRAME PIVOTABLE ABOUT A VERTICAL AXIS, TWO WHEELS ROTATABLY MOUNTED ON SAID FRAME ON OPPOSITE SIDES OF SAID VERTICAL AXIS, AND TWO REVERSIBLE MOTORS MOUNTED ON SAID FRAME AND RESPECTIVELY CONNECTED TO SAID WHEELS IN DRIVING RELATIONS THEREWITH, THE COMBINATION OF: TWO BRIDGE CIRCUITS RESPECTIVELY OPERATIVELY CONNECTED TO SAID MOTORS FOR CONTROLLING THE RESPECTIVE SPEEDS THEREOF; SPEED CONTROL MEANS COMMON TO AND FORMING PARTS OF SAID BRIDGE CIRCUITS FOR SIMULTANEOUSLY AND EQUALLY UNBALANCING SAID BRIDGE CIRCUITS IN THE SAME DIRECTIONS TO SIMULTANEOULSY AND EQUALLY VARY THE SPEEDS OF SAID MOTORS IN THE SAME DIRECTIONS; AND STEERING MEANS FOR RELATIVELY UNBALANCING SAID BRIDGE CIRCUITS IN OPPOSITE DIRECTIONS SO AS TO VARY THE RELATIVE SPEEDS OF SAID MOTORS.
References Cited (Backward Citations)
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Cited
US803008A
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US1038615A
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US2362636A
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US2535108A
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US2528575A
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US2565293A
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US2798565A
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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) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |