US3570227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-propelled random motion lawnmower
Assignee: Mowbot Inc
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Filing: 1969-01-16
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Granted: 1971-03-16
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Expires: 1989-01-16
Abstract
Abstract DISCLOSED IS A SELF-PROPELLED LAWNMOWER FOR CUTTING GRASS IN A COMPLETELY RANDOM AND UNATTENDED MANNER. THE UNIT IS PREFERABLY PROPELLED BY A BATTERY AND COMPRISES A FRAME SUPPORTED ON A PAIR OF FRONT CASTER WHEELS AND A PAIR OF REAR DRIVE WHEELS. THE DRIVE WHEELS ARE COUPLED TO A CONTINUOUSLY ROTATING DRIVE SHAFT BY INDIVIDUAL CLUTCH-BRAKE MECHANISMS. WHEN A BOUNDARY WIRE IS SENSED BY COILS ON THE FRAME, THE DRIVE WHEEL FURTHEST AWAY FROM THE BORDER IS UNCLUTCHED AND BRAKED TO PIVOT OR TURN THE MOWER. NO BACKUP MOTOR OR COMPLEX STEERING CONTROL IS REQUIRED. A PAIR OF ADJUSTABLE ROTARY CUTTER BLADE ASSEMBLIES ARE CARRIED ON THE FRAME.
Inventors
- 👤 S Lawrence Bellinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:54
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/006; A01D34/008; G; G05; G05D; G05D1/00; G05D1/02; G05D1/021; G05D1/0259; G05D1/0265; A01D2101/00; Y; Y10; Y10S; Y10S56/00; Y10S56/15
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |